Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Integrated Geophysical Approach for Rapid & Cost Effective Site Investigation...IEI GSC
Dr. Sanjay Rana, Director, PARSAN Overseas (P) Limited
With inputs & examples from Dr Gopal Dhawan & Dr S L Kapil
at 31st National Convention of Civil Engineers
organised by
Gujarat State Center, The Institution of Engineers (India) at Ahmedabad
The study was carried out using the UAV for analyzing the characteristics of debris in order to present the methodology to estimate the quantitative amount of debris caught in small river facilities. A total of six small rivers that maintained the form of a natural river were selected for collecting UAV images, and the grouping of each target in the image was carried out using the object-based classification method, and based on the object-based classification result of the UAV images, the land cover classification for the status of factors causing the generation of debris for six target sections was carried out by applying the screen digitizing method. In addition, in order to verify the accuracy of the classification result, the error matrix was performed, securing the reliability of the result. The accuracy analysis result showed that for all six target sections, the overall accuracy was 93.95% and the Kappa coefficient was 0.93, showing an excellent result.
Spectral depth analysis of aeromagnetic data covering latitude 9.50 – 12.00 and longitude 9.50 – 12.00, which corresponds to parts of upper Benue Trough and southern Borno Basin, northeast, Nigeria, was carried out for the purpose of investigating the sedimentary thickness beneath the subsurface. The study area was covered by 25 aeromagnetic maps. The aeromagnetic maps were digitized on a 3 km by 3 km grid and later compiled to produce a combined aeromagnetic data file for the area. The 3 km spacing interval imposed a Nyquist frequency of 0.167 km-1 while the data file comprised 7921 data points. The polynomial fitting method was applied in the regional–residual separation. The residual map was later sub-divided into 41 spectral sections. The result of the study shows that the first layer depth was estimated to have ranged from 0.268 km to about 1.08 km while the second layer depth was estimated to have ranged from 2.06 km to about 3.35 km. The highest sedimentary thickness of 3.35 km was found at the northern part of the area and corresponds to areas around Damaturu and Bulkachuwa. These areas may be subjected for further geophysical method like seismic reflection/refraction, so as to ascertain its hydrocarbon potential.
Seagrass mapping and monitoring along the coast of Crete, Greece. Mid-Term Pr...Universität Salzburg
Research problem focuses on studying dynamics of spatial distribution of the seagrass meadows with a case study of P. oceanica, using aerial and satellite imagery over the 10-years period. Characteristics of the spectral reflectance of seagrass enables its discrimination from other seafloor types. Raster images processing using RS methods is suitable for seagrass mapping. Current MSc research is based on various sources of data: fieldwork in-situ measurements, satellite imagery, aerial imagery and GIS layers (maps of Crete). Technically, research is based on using GIS and RS methods: ENVI and ArcGIS software.
An Automated Approach of Shoreline Detection Applied to Digital Videos using ...Dwi Putra Asana
Abstract: This study aims to detect a shoreline location and its changes automatically in the temporal resolution.
This approach is implemented on the coastal video monitoring system applications. The proposed method applied
data mining by using two main systems-a training system using classification and shoreline detection systems with
Self-Organizing Map (SOM) and K-Nearest Neighbor (K-NN) algorithms. The training system performs feature
texture extraction using agray-level co-occurrence matrix and the results are stored to classification process. The
detection system has five processing stages: contrast stretching preprocessing and morphological contrast
enhancement, SOM clustering, morphological operations, feature extraction and K-NN classification and detection
shoreline. Preprocessing was used to improve the video image contrast and reliability. SOM algorithm in
segmenting objects in the onshore video images. Morphological operations were applied to eliminate noise on the
objects that were not needed in the spatial domain. The segmentation results of video frames classified by K-NN.
The aim is to provide the class labels on each region segmentation results, namely, sea label, land label and sky
label. The determination of the shoreline is done by scanning the neighboring pixels from the edge of land class
label after binary image transformation. The shoreline change detection was performed by comparing the position of
existing shoreline and shoreline position in the reference video frame. A Receiver Operating Characteristic (ROC)
curve was used to evaluate the performance of shoreline detection systems. The results showed that the combination
of SOM and K-NN was able to detect shoreline and its changes accurately
This was a presentation given to high school students and other adults in multiple 45 minute sessions. The aim was to educate students on a career in marketing and why you might choose the field as a career.
This is the presentation we gave at Spring 2GX Madrid. It shows how Grails helped us to improve our productivity and why Grails is not that bounded to Groovy and how it can be an outstanding alternative if you are a 100% Java company.
Integrated Geophysical Approach for Rapid & Cost Effective Site Investigation...IEI GSC
Dr. Sanjay Rana, Director, PARSAN Overseas (P) Limited
With inputs & examples from Dr Gopal Dhawan & Dr S L Kapil
at 31st National Convention of Civil Engineers
organised by
Gujarat State Center, The Institution of Engineers (India) at Ahmedabad
The study was carried out using the UAV for analyzing the characteristics of debris in order to present the methodology to estimate the quantitative amount of debris caught in small river facilities. A total of six small rivers that maintained the form of a natural river were selected for collecting UAV images, and the grouping of each target in the image was carried out using the object-based classification method, and based on the object-based classification result of the UAV images, the land cover classification for the status of factors causing the generation of debris for six target sections was carried out by applying the screen digitizing method. In addition, in order to verify the accuracy of the classification result, the error matrix was performed, securing the reliability of the result. The accuracy analysis result showed that for all six target sections, the overall accuracy was 93.95% and the Kappa coefficient was 0.93, showing an excellent result.
Spectral depth analysis of aeromagnetic data covering latitude 9.50 – 12.00 and longitude 9.50 – 12.00, which corresponds to parts of upper Benue Trough and southern Borno Basin, northeast, Nigeria, was carried out for the purpose of investigating the sedimentary thickness beneath the subsurface. The study area was covered by 25 aeromagnetic maps. The aeromagnetic maps were digitized on a 3 km by 3 km grid and later compiled to produce a combined aeromagnetic data file for the area. The 3 km spacing interval imposed a Nyquist frequency of 0.167 km-1 while the data file comprised 7921 data points. The polynomial fitting method was applied in the regional–residual separation. The residual map was later sub-divided into 41 spectral sections. The result of the study shows that the first layer depth was estimated to have ranged from 0.268 km to about 1.08 km while the second layer depth was estimated to have ranged from 2.06 km to about 3.35 km. The highest sedimentary thickness of 3.35 km was found at the northern part of the area and corresponds to areas around Damaturu and Bulkachuwa. These areas may be subjected for further geophysical method like seismic reflection/refraction, so as to ascertain its hydrocarbon potential.
Seagrass mapping and monitoring along the coast of Crete, Greece. Mid-Term Pr...Universität Salzburg
Research problem focuses on studying dynamics of spatial distribution of the seagrass meadows with a case study of P. oceanica, using aerial and satellite imagery over the 10-years period. Characteristics of the spectral reflectance of seagrass enables its discrimination from other seafloor types. Raster images processing using RS methods is suitable for seagrass mapping. Current MSc research is based on various sources of data: fieldwork in-situ measurements, satellite imagery, aerial imagery and GIS layers (maps of Crete). Technically, research is based on using GIS and RS methods: ENVI and ArcGIS software.
An Automated Approach of Shoreline Detection Applied to Digital Videos using ...Dwi Putra Asana
Abstract: This study aims to detect a shoreline location and its changes automatically in the temporal resolution.
This approach is implemented on the coastal video monitoring system applications. The proposed method applied
data mining by using two main systems-a training system using classification and shoreline detection systems with
Self-Organizing Map (SOM) and K-Nearest Neighbor (K-NN) algorithms. The training system performs feature
texture extraction using agray-level co-occurrence matrix and the results are stored to classification process. The
detection system has five processing stages: contrast stretching preprocessing and morphological contrast
enhancement, SOM clustering, morphological operations, feature extraction and K-NN classification and detection
shoreline. Preprocessing was used to improve the video image contrast and reliability. SOM algorithm in
segmenting objects in the onshore video images. Morphological operations were applied to eliminate noise on the
objects that were not needed in the spatial domain. The segmentation results of video frames classified by K-NN.
The aim is to provide the class labels on each region segmentation results, namely, sea label, land label and sky
label. The determination of the shoreline is done by scanning the neighboring pixels from the edge of land class
label after binary image transformation. The shoreline change detection was performed by comparing the position of
existing shoreline and shoreline position in the reference video frame. A Receiver Operating Characteristic (ROC)
curve was used to evaluate the performance of shoreline detection systems. The results showed that the combination
of SOM and K-NN was able to detect shoreline and its changes accurately
This was a presentation given to high school students and other adults in multiple 45 minute sessions. The aim was to educate students on a career in marketing and why you might choose the field as a career.
This is the presentation we gave at Spring 2GX Madrid. It shows how Grails helped us to improve our productivity and why Grails is not that bounded to Groovy and how it can be an outstanding alternative if you are a 100% Java company.
Transparencias de la charla con la que participamos en las III Jornadas de Java de Alicante.
En las transparencias se muestran algunas herramientas para implantar metodologías ágiles en Java y se comentan algunas anécdotas e historias de diferentes implantaciones.
Depth Estimation and Source Location of Magnetic Anomalies from a Basement Co...IOSR Journals
Source locations and depths to magnetic contacts were estimated from the total intensity magnetic
field of an area of 3,025.25 square kilometres on geographical latitude 7o00' N to N o ' 7 30 and longitude
E o ' 3 00 to E o ' 3 30 within Abeokuta area, using local wavenumber method. This study was carried out using
digitised airborne magnetic data of basement complex formation. Structural interpretation of the magnetic data
was achieved through applying advanced processing techniques that provide automatic delineation and depth
estimation of the magnetic structures. Local wavenumber method was used for locating and estimating depth to
magnetic contact. The magnetic contact depth ranges from 0.145km to 2.692km.
Airborne gravity anomaly over Delta State in the Niger delta basin of Nigeria has been interpreted to obtain the structural trends/types and depth to basement in the state. The residual gravity anomaly obtained from a second order polynomial operation on the observed field data was enhanced by a first order filtering operation based on the regional geology. This was converted to a gridded data and analyzed qualitatively to reveal NS and EW trending subsurface structures. Inverse and forward modeling using Oasis Montaj software were applied to selected portions using geological models of sphere and dyke to reveal syncline and anticline structures at depths of between 2005 m to 7372 m, with density contrast of between 1.12 gcm-3 and 2.70 gcm-3. The Euler deconvolution operation with a structural index of one, reveal depths between 124.2 to 16,000 m. The results show that the maximum depth to basement in the area occurs in the northern part of the state with maximum depth of 16,000 m.
Integrated ERT and Magnetic Surveys in a Mineralization Zone in Erkowit - Red...IJERA Editor
The present study focus on integrated geophysical surveys carried out in the mineralization zone in Erkowit region, Eastern Sudan to determine the extensions of the potential ore deposits on the topographically high hilly area and under the cover of alluvium along the nearby wadi and to locate other occurrences if any. The magnetic method (MAG) and the electrical resistivity tomography (ERT) were employed for the survey. Eleven traverses were aligned approximately at right angles to the general strike of the rock formations. The disseminated sulfides are located on the alteration shear zone which is composed of granitic and dioritic highly ferruginated rock occupying the southwestern and central parts of the area, this was confirmed using thin and polished sections mineralogical analysis. The magnetic data indicates low magnetic values for wadi sedimentary deposits in its southern part of the area, and high anomalies which are suspected as gossans due to magnetite formed during wall rock alteration consequent to mineralization. The significant ERT imagesdefinelow resistivity zone as traced as sheared zones which may associated with the main loci of ore deposition. The study designates that correlation of magnetic and ERT anomalies with lithology are extremely useful in mineral exploration due to variations in some specific physical properties of rocks.
Interpretation of Structural Terrace of Sheets: 303, 304 and 305 using Geophy...IIJSRJournal
The study on interpretation of aeromagnetic data of parts of Bamenda Massif (sheet 303, 304, and 305) South-eastern Nigeria has been evaluated. The data sets used are digitized maps of aeromagnetic data. The study area was characterized into four distinct zones such as A, B, C and D. Zone A occur in the northern portion and it is characterized by linear anomaly of amplitude 66.2 - 98.5nT. Zone B and C primarily share the same structural grain connecting the southwest and southern portions of the study area where they are characterised with large ''bull eye'' and narrow shaped anomalies. Zone D occupies the western and central portions of the study area showing features of magnetic highs and lows due to sporadic intrusions. The analysis review lineament structures aligned in a NE-SW and NW-SE trends which is in similar pattern to the initial rifting of the southern Nigerian margin system. Zone A, B and C are bound by intrusives of igneous origin. However, the interconnectivity of the structural lineaments makes them stand out as pathways for mineralization. Thus, most of the lineaments are believed to be located at a depth range of <246.5m to 258.2m, 258.2m to 437m, 212.9m to >626.1m and 769.2m to 1039.7m within the subsurface rocks.
International Refereed Journal of Engineering and Science (IRJES)irjes
a leading international journal for publication of new ideas, the state of the art research results and fundamental advances in all aspects of Engineering and Science. IRJES is a open access, peer reviewed international journal with a primary objective to provide the academic community and industry for the submission of half of original research and applications.
Geophysical techniques work through applying one of several types of force to the ground, to measure the
resulting energy with use of geophysical equipment and infer the geology from this. Geophysics is generally
much quicker than the aforementioned methods, however, requires more data processing (oìce-based work)
to develop the geological picture. A great advantage of these methods is that certain instruments can be
attached to small aircraft for covering large areas during regional airborne surveys. This provides sparser
geological information, but can highlight potential metal anomalies on a county-country scale, which can be
followed up by more detailed, ground-based geophysical surveys. However, as the material is being tested
indirectly, there is no 100% guarantee of its conclusions; in addition to being susceptible to contamination by
many man-made metallic structures e.g. power-lines. Therefore, should geophysical surveys prove suìciently
interesting, drilling will be required afterwards to conêrm the accuracy of the results.
Lithological Investigation at Tombia and Opolo Using Vertical Electrical Soun...IJLT EMAS
Vertical electrical soundings (VES) was carried out in Opolo and Tombia all in Yenagoa local government area, Bayelsa state, Nigeria to understand the resistivity distribution of its subsurface which serves as a tool in investigating subsurface lithology. All VES sounding were stacked together to generate 1D pseudo tomogram and was subsequently interpreted. The interpreted VES curve results shows that Opolo consists of three layers within the depth of investigation. Sandy clay with mixture of silt make up the first layer (Top layer) with resistance value ranging from 24-63Ωm. The second layer is made up of thick clay with very low resistivity values ranging from 3-19Ωm. The third layer is sandyclay with its resistance value ranging from 26-727Ωm.Tombia also reveals that the area is in three layers within the depth of investigation. Sandy clay with a mixture of fine sand made up the first layer (Top soil) with its resistance values ranging from 40-1194Ωm. The second layer is made up of fine sand with resistivity value ranging from 475-5285Ωm. The third layer is made up of sandy clay/sand with its resistance value ranging from 24-28943Ωm.The results of the 1D pseudo tomogram also reveals that Tombia and Opolo consists of three layers within the depth of investigation and pseudo tomograms serves as a basis tool for interpreting lithology and identifying lithological boundaries for the subsurface
Integrated Ocean Drilling Program (IODP) Expedition 324 had long transits from Yokohama, Japan, to Shatsky Rise; between the five sites; and from Shatsky Rise to Townsville, Australia. In all, transits took approximately one-third of the entire time allotted for the expedition. Underway geophysical data were collected in international
waters during transit and between drill sites. Bathymetry and magnetic data were collected using a 3.5 kHz CHIRP/echosounder and marine magnetometer, respectively (Fig. F1). A gyrocompass and a Global Positioning System (GPS) navigation system were used for positioning the bathymetric and magnetic data.
Experimental Investigation of a Household Refrigerator Using Evaporative-Cool...inventy
The objective of this paper was to investigate experimentally the effect of Evaporative-cooled condenser in a household refrigerator. The experiment was done using HCF134a as the refrigerant. The performance of the household refrigerator with air-cooled and Evaporative-cooled condenser was compared for different load conditions. The results indicate that the refrigerator performance had improved when evaporative-cooled condenser was used instead of air-cooled condenser on all load conditions. Evaporativecooled condenser reduced the energy consumption when compared with the air-cooled condenser. There was also an enhancement in coefficient of performance (COP) when evaporative-cooled condenser was used instead of air-cooled condenser. The Evaporative cooled heat exchanger was designed and the system was modified by retrofitting it, instead of the conventional air-cooled condenser by making drop wise condensation using water and forced circulation over the condenser. From the experimental analysis it is observed that the COP of evaporative cooled system increased by 13.44% compared to that of air cooled system. So the overall efficiency and refrigerating effect is increased. In minimum constructional, maintenance and running cost, the system is much useful for domestic purpose. This study also revealed that combining a evaporative cooled system along with conventional water cooled system under the condition that the defrost water obtained from the freezer is used for drop wise condensation over condenser and water cooled condensation of the condenser at the bottom using remaining defrost water would reduce the power consumption, work done and hence further increase in refrigerating effect of the system. The study has shown that such a system is technically feasible and economically viable
Copper Strip Corrossion Test in Various Aviation Fuelsinventy
This research work takes in to account of corrosiveness test on various aviation fuels in the state of Telengana (India). The purpose of this experiment is to determine the corrosiveness test of fuels. This determination will be accomplished by using copper strip corrosion test by using the copper strip experiment we can determine the corrosive property of the fuel and hence the efficiency of fuel. The research covers the importance of knowing the corrosive property of different petroleum fuels including aviation turbine fuel.
Additional Conservation Laws for Two-Velocity Hydrodynamics Equations with th...inventy
A series of the differential identities connecting velocities, pressure and body force in the twovelocity hydrodynamics equations with equilibrium of pressure phases in reversible hydrodynamic approximation is obtaned.
Comparative Study of the Quality of Life, Quality of Work Life and Organisati...inventy
People’s lives are increasingly centred on work; they spend at least one-third of their time within the organisations that employ them. Investigating the factors that interfere with employees’ well-being and the organisational environment is becoming an increasing concern in organisations. This article identifies the criteria of the quality of life (QoL), quality of working life (QWL) and organisational climate instruments to point out their similarities. For bibliographic construction and data research, articles were sought in national and international journals, books and dissertations/articles in SciELO, Science Direct, Medline and Pub Med databases. The results show direct relationships amongst QoL, QWL and organisational climate instruments. The relationship between QoL and QWL instruments is based on fair compensation, social interaction, organisational communication, working conditions and functional capacity. QWL and organisational climate instruments are related through social interaction and interfaces. QoL and organisational climate instruments are related based on social interaction, organisational communication, and work conditions.
A Study of Automated Decision Making Systemsinventy
The decision making process of many operations are dependent on analysing very large data sets, previous decisions and their results. The information generated from the large data sets are used as an input for making decisions. Since the decisions to be taken in day to day operations are expanding, the time taken for manual decision making is also expanding. In order to reduce the time, cost and to increase the efficiency and accuracy, which are the most important things for customer satisfaction, many organisations are adopting the automated decision making systems. This paper is about the technologies used for automated decision making systems and the areas in which automated decisions systems works more efficiently and accurately.
Crystallization of L-Glutamic Acid: Mechanism of Heterogeneous β -Form Nuclea...inventy
The mechanism of heterogeneous nucleation of β-form L-glutamic acid was deeply investigated in cooling crystallization. The present study found that the β-form crystals were epitaxially grown on the α-form crystals and they were preferably crystallized on the (011) and (001) surfaces instead of the (111) surfaces of α- form crystals. This result was explained via the molecular simulation. The molecular simulation indicated that the different surfaces of α-form crystals provided different functional groups, resulting in different sites for the heterogeneous nucleation of β-form crystals. Here, the functional group were COO- , C=O and O-H on the (011) and (001) surfaces of α-form crystals, respectively, while it was the NH3 + on the (111) surfaces of α-form crystals. As such, the degree of lattice matching (E) between the β-form crystals and the various surfaces of α- form crystal was distinguished, where the degree of lattice matching (E) between the β-form crystals and the (011), (001) and (111) surfaces of α-form crystal were estimated as 5.30, 5.25 and 2.39, respectively, implying that the (011) and (001) surfaces of α-form crystal were more favorable to generate the heterogeneous nucleation of β-form crystals than the (111) surfaces of α-form crystal
Evaluation of Damage by the Reliability of the Traction Test on Polymer Test ...inventy
In recent decades, polymers have undergone a remarkable historical development and their use has been greatly imposed by gradually dethroning most of the secular materials. These polymer materials have always distinguished themselves by their simple shaping and inexpensive price, their versatility, lightness, and chemical stability but despite their massive use in everyday life as well as in advanced technologies. Generally, these materials still not understood which requires a thorough knowledge of their chemical, physical, rheological and mechanical properties. This paper, we study the mechanical behavior of an amorphous polymer: Acrylonitrile Butadiene Styrene “ABS” by means of uniaxial tensile testing on pierced test pieces with different notch lengths ranging between 1 to 14mm.The proposed approach consists in analyzing the evolution of the global geometry of the obtained strain curves by taking into account the zones and characteristic points of these curves as well as the effect of the damage on the mechanical behavior of the polymer ABS, in order to visualize the evolution of the damage by a static model
Application of Kennelly’model of Running Performances to Elite Endurance Runn...inventy
: The model of Kennelly between distance (Dlim) and exhaustion time (tlim) has been applied to the individual performances of 19 elite endurance runners (World-record holders and Olympic winners) from P. Nurmi (1920-1924) to M. Farah (2012) whose individual best performances on several different distances are known. Kennelly’s model (Dlim = k tlim ) can describe the individual performances of elite runners with a high accuracy (errors lower than 2 %). There is a linear relationship between parameters k and exponents of the elite runners and the extreme values correspond to S. Coe (k = 15.8; = 0.851) and E. Zatopek (k = 6.57; = 0.984). Exponent can be considered as a dimensionless index of aerobic endurance which is close to 1 in the best endurance runners. If it is assumed than maximal aerobic speed can be maintained 7 min in elite endurance runners, exponent is equal to the normalized critical speed (critical speed/maximal aerobic speed) computed from exhaustion times equal to 3 and 12.5 min in these runners.
Development and Application of a Failure Monitoring System by Using the Vibra...inventy
In this project, a failure monitoring system is developed by using the vibration and location information of balises in railway signaling. A lot of field equipment in railway are loosening and broken in time period so that they need maintenance due to the vibrations that occur due to high speed trains traffic and railway vehicles impact. Among the field equipment, balises have very important role of communication in terms of transmitting information to trains. In this scope, it is aimed to make maintenance works more efficient, have no delayed trains, detect previously failure location and intervene in failure timely, by detecting and controlling balise cases such as loosening, out of place and the data consistency error that happens because of balise physical state. In this project, the communication is provided with I2C, Modbus RTU (Remote Terminal Unit) and RS485 standards by using Arduino Uno cards and MPU6050 IMU (Inertial Measurement Unit) sensors in laboratory. Each used sensors are in slave mode and computer interface designed with C# is in master mode. Fault situations in the system are checked instant by the interface. (it is assumed to mount the IMU sensor and the Arduino circuit on the balise) it is seen that the interface responds to the sensor movements instant and the system works well in the end of test processes.
The Management of Protected Areas in Serengeti Ecosystem: A Case Study of Iko...inventy
The study assessed the management of protected areas in Serengeti ecosystem using the case of IGGRs. Specifically, the study aimed at identifying the strategies used for natural resources management; examining the impacts of those strategies; examining the hindrances of the identified strategies; and lastly, examining the methods for scaling up the performance of strategies used for natural resources in the study area. The study involved two villages among 31 villages bordering IGGRs where in each village; at least 5% of the households were sampled. Both Primary data and secondary data were collected and analyzed both manually and computer by using SPSS software. The study revealed that, study population ranked IGGRs performance on protection of natural resources, especially on conserving wildlife for future generation and in reducing poaching to be good(53.3%). In addition, the relationship with IGGRs was said to be considerable good (46.7%). In the aspect of reducing poaching, the findings show that poaching has been reduced by 96.2% from 2009 to 2012. Furthermore, 81.4% of respondents said they use different strategies to control loss of natural resources which in turn has considerably improved the relationship between protected areas and the surrounding communities in some of the aspects. Despite of above successes, the study findings has revealed a number of challenges that hinders the full attainment of conservation objectives. Among the challenges are loss of life and properties (86.4%), shortage of water for livestock (68.9%) since water sources such as Grumeti and Rubana rivers are within protected area while the adjacent local communities do not have a free access to those water sources. Other challenges especially on the IGGRs management include insufficient fund base, working facilities and inadequate staffs. Based on the above findings, the study concluded that the strategies used for natural resources management of protected areas in Serengeti ecosystem is fairly sustainable and need functional participatory approaches of local people and other stakeholders in order to bring about a collaborative natural resources management network in the ecosystem. Furthermore, based on the findings above, equity in benefit sharing accrued from natural resource management in protected areas, more financial support to IGGRs and local community, the use of non-lethal deterrents for crop protection, integration of croplivestock production systems, adoption of land use plans as a solution to land conflicts, strengthens of community based conservation (CBC), adoption of modern information technology such as geographical information system (GIS) and remote sensing are recommended.
Size distribution and biometric relationships of little tunny Euthynnus allet...inventy
This study is taken from data of commercial fishing of the little tunny, Euthynnus alletteratus (Rafinesque, 1810) caught in the Algerian coast, sampled between november 2011 and april 2016. Data were collected in order to determine size distributions of the population and biometric relationships of species including the size - weight relationships. A total of 601 fish ranged from 30.9 and 103 cm fork length (FL) were observed. The size distribution of Euthynnus alletteratus shows multiple modal values witch the most important cohort corresponds to the age class 2 (42-46 cm). The value of the allometric coefficient (b) of the FL/TW relationship is lower than 3, indicating a negative allometric growth.
Removal of Chromium (VI) From Aqueous Solutions Using Discarded Solanum Tuber...inventy
Industrial polluting effluents containing heavy metals are of serious environmental concern in India. Chromium is frequently used in industries like electroplating, metal finishing, cooling towers, dyes, paints, anodizing and leather tanning and is found as traces in effluents finding their way to natural water bodies causing hazardous toxicity to the health of humans, animals and aquatic lives directly or indirectly. Many methods for the removal of Chromium such as chemical reduction, precipitation, ion exchange, electrochemical reduction, evaporation, reverse osmosis and adsorption using activated carbon etc. have been reported but all being expensive and complicated to operate. Experimental practices reveal that adsorption by agricultural and horticultural wastes are quite simple, inexpensive and efficient method. Agra is famous for Potato farming, a lot of discarded potato waste from cold storages is thrown along road side drains causing solid waste generated which either creates solid waste disposal problem or otherwise it finds way to Yamuna river resulting high BOD and posing a serious threat to the aquatic environment. For developing countries like India adsorption studies using discarded potato (Solanum tuberosum) waste from cold storages (DPWC) a solid waste as low cost adsorbent for Chromium removal was dual beneficial i.e., an ideal solution to these solid wastes disposal problem of Agra and removal of Chromium from tannery effluents and thereby saving aquatic life from Chromium contamination in Yamuna river. Keeping this in view batch experiments were designed to study the feasibility of discarded potato waste from cold storages to remove chromium (VI) from the aqueous solutions. During the study various affecting parameters, such as pH, adsorbent does, initial concentration, temperature, contact time, adsorbent grain size and start up agitation speed were optimized as 5.0, 10-20 g/l, 50 mg/l, 250C, 135 minutes, average size and 80 rpm respectively on chromium removal efficiency. Various Isotherms such as Langmuir, Freundlich, Tempkin also fitted suitably and various corresponding constants determined from these Isotherms favor and support the adsorption. Thermodynamic constants ∆G, ∆H and ∆S were found to be 0.267 KJ/mole, 0.288 KJ/mole and 0.0013 KJ/mole respectively.
Effect of Various External and Internal Factors on the Carrier Mobility in n-...inventy
The effect of various external (temperature, electric field, light) and intracrystalline (doping, initial resistivity) factors on the mobility of carriers in layered n-InSe semiconductor experimentally have been investigated. Scientific explanations of the results are proposed
Transient flow analysis for horizontal axial upper-wind turbineinventy
This study is to carry out a transient flow field analysis on the condition that the wind turbine is working to generate turbine, the wind turbine operating conditions change over time, Purpose of this study is try to find out the rule from the wind turbine changing over time . In transient analysis, the wind velocity on inlet boundary and rotation speed in the rotor field will change over time, and an analytical process is provided that can be used for future reference. At present, the wind turbine model is designed on the concept of upwind horizontal axis type. The computer engineering software GH Bladed is used to obtain the relationship between the rotor velocity and the wind turbine. Then the ANSYS engineering software is used to calculate the stress and strain distribution in the blades over time. From the analytical result, the relationship between the stress distribution in the blades and the rotor velocity is got to be used as a reference for future wind turbine structural optimization.
Choice of Numerical Integration Method for Wind Time History Analysis of Tall...inventy
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Electricity demand in Saudi Arabia is steadily increasing as electrical loads grows at a rate of about 7% per year, this represents a high rate by all standards, and largely due to population growth, as well as due to government subsidies which may lead to prices much lower than actual production cost. This growth represents a challenge that requires Saudi Electricity Company (SEC) to invest huge amounts of money every year, for the construction of additional generation capacity along with the reinforcement of transmission network to meet the consumption growth.Also the demand varies frequently throughout the day, causing a waste of a large part of the energy. SEC believes the optimum solution lies in altering the load shape in order to have a better balance between customer’s consumption and SEC’s generation, This paper describes the method for improving the power system reliability by shifting the portion of peak load to off-peak periods This load management scheme can be achieved by lifting the generation during off peak periods and utilizing the stored energy during peak periods. A hybrid set up involving solar and wind energy along with batteries can also be used to store energy and utilize it during peak periods.
Reliability Evaluation of Riyadh System Incorporating Renewable Generationinventy
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The capacitors are increasingly being used as energy storage devicesin various power systems. The scientists of the world are tryingto maximize the electrical capacity of the supercapacitors. To achieve this purpose, numerous method sare used: the surface activation of electrodes, the surface etching using the electronbeam, the electrode etching with variousgasplasma, etc. The purpose of this work is toresearch how the properties of carbon electrodes depend on the plasma parameters at whichtheywere formed. The largest surface area ofcarbonelectrodeof47.25m2 /gis obtainedat 15 ofAr/C2H2gasratio. Meanwhile, theSEMimages show that the disruption of structures with low bond energies and the formation of new onesare taking place when the carbon electrodes are etched at acetylene plasma and placed on carbon electrode. The measurements of capacitance showthat capacitors with affectedelectrodes have about10-15% highercapacity than those not treated with acetyleneplasma.
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D41037045
1. Research Inventy: International Journal Of Engineering And Science
Vol.4, Issue 1 (January 2014), PP 37-45
Issn(e): 2278-4721, Issn(p):2319-6483, Www.Researchinventy.Com
Delineation of Magnetic Zones of Sokoto Basin, in Northwestern
Nigeria, Using Aeromagnetic Data.
Bonde,D. S.*1; Udensi E.E2; Momoh M1.
1
Department of physics, Kebbi State University of Science and Technology, Aliero.
2
Department of physics, Federal University Technology, Minna.
ABSTRACT:The Sokoto Sedimentary Basin in northwestern Nigeria, is situated between latitudes 10 o 30″ N to
14o 00″ N and longitude 3o30″ E to 7o 00″ E with an estimated area of 59,570 km 2.We used visual interpolation
method to digitized twenty nine aeromagnetic maps of the Basin, the data obtained was used to produce the
Total Magnetic Intensity and the Residual Maps. The Residual Magnetic Map was subjected to Upward
continuation techniques; applied at 2km, 3km, 5km, 7km, 10km and 15km. The results of the studies delineated
areas of higher sedimentations such as Isah, Rabah, Talata/Mafara and Gandi in the northeastern part of the
area. These areas of relatively thicker sediments, identified in this study, are therefore the most probable sites
for prospect of hydrocarbon accumulation in the area.
KEYWORDS:Magnetic Anomaly,Total magnetic Intensity Map, Residual map.
I.
INTRODUCTION
The earth and its contents have long been of concern to mankind. Man has tried to unravel its
complexity and delve into its origin via various geophysical methods. The subsurface has been of particular
concern to geoscientists, who seek to investigate it using diverse means, some for the purpose of having
knowledge, while others do it for exploration of economic resources such as minerals and hydrocarbons. With
the advances in technology and the need to have a clearer picture of the earth subsurface and its contents, the
earth
scientists
have deemed it necessary to utilize the properties associated with earth’s interior.
Geophysics involves the application of physical principles and quantitative physical measurements in order to
study the earth’s interior. The analysis of these measurements can reveal how the earth interior varies both
vertically and laterally, and the interpretation of which can reveal meaningful information on the geological
structures beneath Dobrin (1976).By working at different scales, geophysical methods may be applied to a wide
range of investigations from studies of the entire earth to exploration of a localized region of the upper crust for
engineering or other purposes (Kearey et al., 2004). A wide range of geophysical methods exist for each of
which there is an operative physical property to which the method is sensitive. The type of physical property to
which a method responds clearly determines its range of application.
Thus, for instance, magnetic method is very suitable for locating buried magnetic ore bodies because of
their magnetic susceptibility. Similarly, seismic and electrical methods are suitable for locating water table,
because saturated rock may be distinguished from dry rock by its higher seismic velocity and higher electrical
conductivity (Kearey et al., 2004). In exploration for subsurface resources, the geophysical methods are capable
of detecting and delineating local features of potential interest. Geophysical methods for detecting
discontinuities, faults, joints and other basement structures, include the following: magnetics, seismic,
resistivity, electrical, potential field, well logging, gravity, radiometric, thermal etc (Corell andGrauch,1985) .
Some geophysical methods such as gamma- ray spectrometry and remote sensing measure surface
attributes; others, such as thermal and some electrical methods are limited to detecting relatively shallow
subsurface geological features. Geophysical modeling provides generalized and no-unique solution to questions
concerning the concerning the geometry of the subsurface geologic structures (Reeves, 2005).Most economic
minerals, oil, gas, and groundwater lie concealed beneath the earth surface, thus hidden from direct view. The
presence and magnitude of these resources can only be ascertained by geophysical investigations of the
subsurface geologic structures in the area.In study of sedimentary basins for hydrocarbon potentials; depth
estimation of the sediments is very crucial because all other necessary conditions for hydrocarbon maturation
depend on the thickness of the basin. Therefore If the area under investigation has no previous
geological information and the primary aim of the study is to search for hydrocarbon deposits; the first question
that must be answered, is whether the sedimentary basin is large enough and thick enough to justify any further
investigations ( Reynolds,1990).Other criteria for assessing a basin for possible hydrocarbon accumulation are
as follows:
37
2. Delineation Of Magnetic Zones Of Sokoto Basin…
Source rock: The presence of a source rock with adequate organic materials of various types determines
whether oil or gas will be sourced in the process of hydrocarbon generation.
Reservoir rock: Reservoir rock ensures that hydrocarbon generated are accommodated in pore spaces that
exists between the grains in the subsurface.
Seal: seals are normally without pore spaces ensures that hydrocarbon generated in the reservoir rocks are
kept in place and prevented from migrating to the surface and subsequent loss.
Paleotemperatures: Paleotemperatures or ancient Paleotemperatures are responsible for generation of
hydrocarbon from organic matter.
Trap:The trap ensures that oil sealed in place does not migrate and be lost.
In this study, aeromagnetic data of Sokoto Basin was used to produce total magnetic intensity and residual
magnetic maps of the basin. The residual map was subjected to Upward continuation techniques; applied at
2km, 3km, 5km, 7km, 10km and 15km to delineate areas of higher sedimentation which might favor
accumulation of hydrocarbon..
1.1 The study area
The study area is the Sokoto Sedimentary Basin, in northwestern Nigeria (Figure1.1).The Sokoto Basin lies
between longitudes 3030″E and 6o58″E and latitudes 10o 20″N and 14o 00″N with an estimated area of 59,570
km2.The Basin is covered by twenty- nine half-degree aeromagnetic maps (8-13; 26-32; 48-54; 71-74; 94-97;
and 116-119) of the Geology Survey of Nigeria, now renamed the Nigerian Geological Survey Agency (NGSA).
The Sokoto Sedimentary Basin forms the southeastern segment of a large synclinal basin, the Iullemmeden
basin. The Iullemmeden basin (Figure 1.2) lies entirely with the Pan African province of West Africa; which
encompasses parts of Algeria, Mali, and republics of Benin and Niger. The Basin is bounded to the north by the
massifs of the Adrar des Iforas, Hoggar and Air regions. To the west, it is connected to the Taoudeni Basin by
the Gao trough. To the east the Iullemmeden Basin is contiguous with the Chad Basin, through the Damergou
area. In the south, the basement rocks of northern Nigeria delimit the Iullemmeden basin. The center of the
Iullemmeden basin is located north of Niamey in the republic of Niger.
38
3. Delineation Of Magnetic Zones Of Sokoto Basin…
1.2
Aim and objectives of the study
The aim of the present study is to apply upward continuation techniques on the residual magnetic intensity map
of Sokoto sedimentary basin with a view of delineating magnetic zones
The objectives of the study include the following:
To delineate magnetic zones in sokoto basin using upward continuation techniques.
To determine the economic potentials of the basin in terms of hydrocarbon prospects.
The study would generate and upgrade the existing geophysical database of the study area.
II.
MATERIALS AND METHODS
The study area is covered by twenty nine aeromagnetic maps of total field intensity in half –degree
sheets. These maps are obtained from the Nigerian Geological Survey Agency (NGSA), now renamed the
Nigerian Geological Survey Agency (NGSA)).The Agency carried out an airborne magnetic survey of
substantial part of Nigeria between 1974 and 1980. The magnetic information consists of flight lines plotted on
a continuous strip chart or tape records. The data were collected at a nominal flight altitude of 152.4m along N-S
flight lines spaced approximately 2 km apart. The magnetic data collected were published in the form ½ degree
aeromagnetic maps on a scale of 1:100,000. The magnetic values were plotted at 10nT (nano Tesla) interval.
The maps are numbered, and names of places and coordinates (longitude and latitudes) written for easy
reference and identification. The actual magnetic values were reduced by 25,000gamma before plotting the
contour map. This implies that the value 25,000 gamma is to be added to the contour values so as to obtain the
actual magnetic field at a given point. A correction based on the International Geomagnetic Reference Field,
(IGRF,) and epoch date January 1, 1974 was included in all the maps.
The visual interpolation method,that is the method of digitizing on Grid Layout was used to obtain the
data
from field intensity aeromagnetic maps covering the study area. The data from each digitized map is
recorded in a 19 by 19 coding sheet which contains the longitude, latitude and the name of the town flown and
the sheet number. The unified composite dataset for the study area was produced after removing the edge effect.
Surfer 8 Geosoftware was used to import the data set. The dataset consists of three columns (longitude,latitude
and magnetic values). The composite map was produced using Oasis Montaj..
2.1 Production of Regional and Residual Maps
The residual magnetic field of the study area was produced by subtracting the regional field from the
total magnetic field using the Polynomial fitting method. The computer program Aerosupermap was used to
generate the coordinates of the total intensity field data values. This super data file, for all the magnetic values
was used for production of composite aeromagnetic map of the study area using Oasis Montaj software version
7.2 A program was used to derive the residual magnetic values by subtracting values of regional field from the
total magnetic field values to produce the residual magnetic map and the regional map.
2.2Upward Continuation
Upward continuation is used in order to simplify the appearance of regional magnetic maps by
suppressing the effects due to local features. The proliferation of local magnetic anomalies often obscures the
regional features with an overabundance of detail. Upward continuation thus smoothed out these disturbances
without impairing the main regional features.The main purpose of upward continuation is to view the magnetic
field intensity at a height above flight level so as to eliminate short wavelength anomalies by emphasizing
longer ones reflecting regional features. The total magnetic field of the earth obeys coulomb’s inverse square
law
(TMI a 1/r2)
2.1
it falls off rapidly with height i r.
A potential field measured on a given observation plane at a constant height can be calculated as though the
observations were made on different plane, either higher (upward continuation) or lower (downward
continuation).
The equation of the wave number domain filter to produce upward continuation is simply:
F = e- hw
Where (h) is the continuation height.
2.2
39
4. Delineation Of Magnetic Zones Of Sokoto Basin…
This function decays steadily with increasing wave number, attenuating the height wavenumbers more severely,
thus producing a map in which more regional features predominate.
Similarly the equation of the wave number domain filter to produce downward continuation is:
F = ehw
2.3
This is a curve, which is zero at wave number and increases exponentially at higher wavenumber,
thus emphasizing the effect of shallow sources and noise. Noise removal is therefore an essential first step
before downward continuation is applied,and continuation depths should not exceed real source depths.
Some careful experimentation is usually necessary to obtain acceptable result (Reeves, 2005).
III.
RESULTS AND ANALYSIS
The total magnetic intensity map ﴾TMI﴿ of the Sokoto sedimentary basin produced from this study using Oasis
Montaj is as shown in Figure 3.1.
Figure 3.1 The total magnetic intensity map ﴾TMI﴿
The TMI map of Sokoto sedimentary basin can be divided into main three sections, though minor
depressions exist scattered all over area. The northern part of the Sokoto basin is characterized by low magnetic
intensity values represented by dark-green-blue color. Whereas the southern part is dominated by high magnetic
intensity values indicated by red color. The two sections are separated by a zone characterized by medium
magnetic intensity values area depicted by yellow-orange color. These high magnetic intensity values, which
dominate the southern part of the Sedimentary basin are caused probably by near surface igneous rocks of
high values of magnetic susceptibilities. The low amplitudes are most likely due to sedimentary rocks and other
non-magnetic sources. In general, high magnetic values arise from igneous and crystalline basement rocks.
Whereas low magnetic values are usually from sedimentary rocks or altered basement rocks. The sedimentary
thickness of the Sokoto basin in general, appears to increases from south to north. This collaborates well with
earlier findings of 2D Seismic surveys conducted by ELF and Mobil Companies carried out in 1979.Inspection
of the total magnetic intensity map (TMI) of the study area( Figure 3.1)does not show any general or particular
trend. However, northeast- southwest trend is observed in the north central part of the total magnetic intensity
map of the study area. Ananaba and Ajakaiye﴾1989﴿based on lineament of LANDSAT images, identified
predominate tectonic trends in the NE –SW, NW-SE directions over the entire basin and in particular over parts
of the country rejuvenated during tectonic phase of the pan Africa Oregency.Umego, ﴾1990﴿, in a study of
aeromagnetic field over the Sokoto basin, identified the existence of NE-SW trending anomalies as the
predominant magnetic features in the area. He observed that the sediments in the basin were not subjected to a
40
5. Delineation Of Magnetic Zones Of Sokoto Basin…
remarkable degree of faulting as only NW-SE trending faults have been observed in the vicinity of Dange( sheet
No.29) and Gilbedi villages within the study.
3.1 Regional Magnetic Intensity Map
The regional magnetic intensity map of the study area (Figure 3.2) produced using Oasis Montaj.
Figure 3.2 The regional magnetic intensity map of the study area.
The regional magnetic values ranges from 7830nano tesla to 7870nano tesla and the values decreases
from south to north indicating there is a fill of sediments more in the northern part of the basin than in the
southern part of the study areaThe trend of the regional map of the study areas is in the east-west direction. The
regional trend is attributed to effects of deeper heterogeneity of the earth crust.
The regional map (Figure 3.2) agrees well with the total magnetic intensity map obtained from the study.
3.2 Residual Magnetic Intensity Map
Figure 3.3 is the residual magnetic intensity maps of the study area obtained from the total magnetic intensity
map produced using Surfer 8, while Figure 3.4 the residual magnetic intensity maps of the study area obtained
from the total magnetic intensity map produced using a Oasis Montaj.
41
6. Delineation Of Magnetic Zones Of Sokoto Basin…
13
120
100
12.5
latitude
80
60
40
12
20
0
-20
11.5
-40
-60
-80
11
-100
-120
-140
10.5
3.5
-160
4
4.5
5
5.5
6
6.5
Figure 3.3 the residual magnetic intensity maps of the study area(Surfer8)
longitude
Figure 4.6: The residual magnetic map of the study area
Figure 3.4 the residual magnetic intensity maps of the study area(Oasis Montaj)
42
7. Delineation Of Magnetic Zones Of Sokoto Basin…
The magnetic intensity values ranges from -10 nano tesla to 40 nano tesla. Negative magnetic intensity values
are more predominant in the northern section of the study area while the southwest has more of positive
magnetic intensity values. Northeast –Southwest trends are observed in the north central part of the TMI map.
3.3 TMI Upward continued at 2km
The total magnetic intensity map of the study area was upward continued at 2 km to produce Figure
3.6 At the height of 2 km, the shorter wavelength anomalies are visible, though slightly refined than the total
magnetic intensity map. Four sections can be observed.At the bottom side of the map (latitude 11 o 00″N to 12o
00″N and longitude 3o 30″E to 5o 00″E), is predominantly pink color with few traces of green and blue colors. A
light pink color is observed in the middle of this portion. Within the range of longitude 3o 30″E to 5o 00″E and
latitude 12o 00″N to 13 o 00″N is a section characterized by yellow color with few traces of green and blue
pigments.The third section is the area defined by latitude 12 o00″N to 13 o30″N and longitude 3o 30″E to 6o
00″E. Green color dominates this portion of the map.At the extreme northern part of the map, approximately the
ranges of longitude 4 o 30″E to 6 o 30″E and latitude 12 o.00″N to 13 o30″N, blue and dark- blue colors are
prevalent in this area. This is the section of the study area having the highest sedimentary thickness.
Figure 3.6
Figure 3.7
Figure 3.9
Figure 3.8
Figure 3.10
Figure 3.11
TMI Upward continued at 3km
The map of upward continuation to 3 km is shown in Figure 4.7 This figure shows that there is a net
difference between the TMI maps at this flight level. Here, the short wavelength anomalies have begun
disappearing thereby consolidating longer wavelength, anomaly units are getting enhanced. Concrete links
between same anomaly types are clearly visible and distinct. We can see that yellow to velvet color shaded
anomalies are on the other hand maturing by enhancing blue color shaded anomalies. The map can be divided
into four sections. At the bottom side of the map (latitude 11 o 00″N to 12o 00″N and longitude 3o 30″E to 5o
00″E), is predominantly pink color with few traces of green and blue colors. A light pink color is observed in
the middle of this portion.Within the range of longitude 3 o 30″E to 5o 00″E and latitude 12o 00″N to 13 o 00″N is
43
8. Delineation Of Magnetic Zones Of Sokoto Basin…
a section characterized by yellow color with few traces of green and blue pigments.Green color dominates the
portion of the map defined by latitude 12 o00″N to 13 o30″N and longitude 3o 30″E to 6o 00″E.
At approximately the ranges of longitude 4 o 30″E to 6 o 30″E and latitude 12 o.00″N to 13 o30″N,(at the extreme
northern part of the map) blue and dark- blue colors are prevalent in this area which indicates areas of highest
sedimentary thicknesses
TMI Upward continued at 5km
The upward continuation of the total magnetic field map at 5 km is shown in Figure 4.8 The map
shows that basement features are standing out at the detriment of shallow sedimentary features. Basement
structures and the lineaments in the study area are here well defined because erratic signals are filtered. Fault
boundaries between basement and sedimentary areas can be clearly seen. At the bottom side of the map (latitude
11o 00″N to 12o 00″N and longitude 3o 30″E to 5o 00″E), is predominantly pink color with few traces of green
and blue colors. A light pink color is observed in the middle of this portion. Within the range of longitude 3o
30″E to 5o 00″E and latitude 12o 00″N to 13 o 00″N is a section characterized by yellow color with few traces of
green and blue pigments. The third section is the area defined by latitude 12 o00″N to 13 o30″N and longitude
3o 30″E to 6o 00″E. Green color dominates this portion of the map. Areas around bounded by longitude 4 o 30″E
to 6 o 30″E and latitude 12 o.00″N to 13 o30″N, blue and dark- blue colors are prevalent in this area. This is the
section having the highest sedimentary thickness in the study area.
TMI Upward continued at 7km
The map of the upward continuation 7 km height above flight level is shown in Figure 4.9 At this
height, basement structures occupy much more portion of the study area. Low magnetic areas are found to be
northern part. At 7 km depth, the erratic signals are very minimal , hence basement structures and lineaments in
the study area are here well defined at this depth. Around the areas bounded by latitude 11o 00″N to 12o 00″N
and longitude 3o 30″E to 5o 00″E, is predominantly pink color with few traces of green and blue colors. A light
pink color is noticeable in the middle of this portion. Within the range of longitude 3o 30″E to 5o 00″E and
latitude 12o 00″N to 13 o 00″N is a section characterized by yellow color with few traces of green and blue
pigments. The third section is the area defined by latitude 12 o00″N to 13 o30″N and longitude 3o 30″E to 6o
00″E. Green color dominates this portion of the map. At the extreme northern part of the map, approximately
the ranges of longitude 4 o 30″E to 6 o 30″E and latitude 12 o.00″N to 13 o30″N, blue and dark- blue colors are
common in the area . This particular section of the study area shows the highest sediments.
TMI Upward continued at 10 km
The map of the upward continuation at 10 km height above flight level is sho 4.10. At this height,
basement structures appeared quite distinct from the sedimentary areas. Areas of lowest magnetic values, (i.e
areas of thicker deposits of sediments) found to be at northeast part of the study area. The forth section of this
map, particularly the area defined by longitude 5 o30″E to 6o 30″E and latitude12o 00″N to13o 00″N is large a
portion of dark blue color ; clearly an indication of the area having the highest sedimentary thickness in the
study area.At the bottom side of the map (latitude 11 o 00″N to 12o 00″N and longitude 3o 30″E to 5o 00″E), is
predominantly pink color with few traces of green and blue colors. A light pink color is observed in the middle
of this portion.The area bounded by longitude 3 o 30″E to 5o 00″E and latitude 12o 00″N to 13 o 00″N is a section
characterized by yellow color with few traces of green and blue pigments. The third section is the area defined
by latitude 12 o00″N to 13 o30″N and longitude 3o 30″E to 6o 00″E. Green color dominates this portion of the
map.At the extreme northern part of the map, approximately the ranges of longitude 4 o 30″E to 6 o 30″E and
latitude 12 o.00″N to 13 o30″N, blue and dark- blue colors are prevalent in this area. This is the section having
the highest sedimentary thickness in the study area.
TMI Upward continued at 15km
The map of the upward continuation at 15 km height above flight level is shown in Figure 4.11. At this
height, basement structures appeared quite distinct from the sedimentary areas. Areas of lowest magnetic
values, (i.e areas of thicker deposits of sediments) found to be at northeast part of the study area. The forth
section of this map, particularly the area defined by longitude 5 o30″E to 6o 30″E and latitude12o 00″N to13o
00″N is large portion of dark blue color ; clearly and indication of the area having the highest sedimentary
thickness in the study area. This area is found to be in sheets numbers 11 (Rabah) and 12 (Isah) of the index
map of Nigeria .comparison and close observation of the maps of downward continuation at depths of 2 km, 3
km, 5 km, 7 km and 10 km clearly show progressive disappearance of disturbances (noises) due to the shallow
effect of the magnetic anomalies, thereby enhancing the regional effects distinctively. The northern part of the
study area is generally characterized with low magnetic values, an indication of either thicker sediments in the
44
9. Delineation Of Magnetic Zones Of Sokoto Basin…
region, or deep seated anomalies. Figures 3.10 and 3.11clearly show the regional effects and the maps trend
wise resembles the total magnetic intensity map as well as the regional map of the study area.
IV.
CONCLUSION AND RECOMMENDATIONS
The analysis of the total magnetic intensity map (TMI), the regional map, the residual map, the the
upward continuation maps at 2km, 3km, 5km, 7km, 10km and 15km of Sokoto basin, all indicate that the basin
is shallower in the south and thicker in the north which borders with Niger Republic Upward continuation
results delineated Rabah , Isah, Gandi and Mafara areas having highest sedimentation in the study area. The
result collaborates with those obtained by other researchers that conducted studies in some sections of the basin;
notably are results of studies by Umego (1990), Adetonaet al.,( 2007),Uwah. (1984) and Udensi (2013).
Exploration of the Nigerian inland basins is worth given a push. Hydrocarbons if discovered and harnessed
findings will increase the country’s reserve and boost productivity. All these will have economic and strategic
benefits for the country. There is therefore the need to take advantage of modern geophysical methods in the
exploration of Nigerian inland basins.
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