Flooding is one of the most devastating natural
disasters in Nigeria. The impact of flooding on human activities
cannot be overemphasized. It can threaten human lives, their
property, environment and the economy. Different techniques
exist to manage and analyze the impact of flooding. Some of these
techniques have not been effective in management of flood
disaster. Remote sensing technique presents itself as an effective
and efficient means of managing flood disaster. In this study,
SPOT-10 image was used to perform land cover/ land use
classification of the study area. Advanced Space borne Thermal
Emission and Reflection Radiometer (ASTER) image of 2010 was
used to generate the Digital Elevation Model (DEM). The image
focal statistics were generated using the Spatial Analyst/
Neighborhood/Focal Statistics Tool in ArcMap. The contour map
was produced using the Spatial Analyst/ Surface/ Contour Tools.
The DEM generated from the focal statistics was reclassified into
different risk levels based on variation of elevation values. The
depression in the DEM was filled and used to create the flow
direction map. The flow accumulation map was produced using
the flow direction data as input image. The stream network and
watershed were equally generated and the stream vectorized. The
reclassified DEM, stream network and vectorized land cover
classes were integrated and used to analyze the impact of flood on
the classes. The result shows that 27.86% of the area studied will
be affected at very high risk flood level, 35.63% at high risk,
17.90% at moderate risk, 10.72% at low risk, and 7.89% at no
risk flood level. Built up area class will be mostly affected at very
high risk flood level while farmland will be affected at high risk
flood level. Oshoro, Imhekpeme, and Weppa communities will be
affected at very high risk flood inundation while Ivighe, Uneme,
Igoide and Iviari communities will be at risk at high risk flood
inundation level. It is recommended among others that buildings
that fall within the “Very High Risk” area should be identified
and occupants possibly relocated to other areas such as the “No
Risk” area.
APPLICATIONS OF REMOTE SENSING AND GIS TECHNOLOGIES IN FLOOD RISK MANAGEMENTrsmahabir
Flooding is the most common of all major disasters that regularly affect populations and results in extensive damage to property, infrastructure, natural resources, and even to loss of life. To ensure better outcomes, planning and execution of flood management projects must utilize knowledge on a wide range of factors, most of which are of a spatial nature. Advances in geospatial technologies, specifically remote sensing and Geographic Information Systems (GIS), have enabled the acquisition and analysis of data about the Earth's surface for flood mitigation projects in a faster, more efficient and more accurate manner.
Remote sensing and GIS have emerged as powerful tools to deal with various aspects of flood management in prevention, preparedness and relief management of flood disaster. GIS facilitates integration of spatial and non-spatial data such as rainfall and stream flows, river cross sections and profiles, and river basin characteristics, as well as other information such as historical flood maps, infrastructures, land use, and social and economic data. Such data sets are critical for the in-depth analysis and management of floods.
Remote sensing technologies have great potential in overcoming the information void in the Caribbean region. The observation, mapping, and representation of Earth’s surface have provided effective and timely information for monitoring floods and their effect. The potential of new air- and space-borne imaging technologies for improving hazard evaluation and risk reduction is continually being explored. They are relatively inexpensive and have the ability to provide information on several parameters that are crucial to flood mapping and monitoring.
Remote Sensing Method for Flood Management SystemIJMREMJournal
Flood occurred when heavy and continuous rainfall exceeding the absorptive capacity of soil and the flow
capacity of rivers, streams, and coastal areas. Land areas that are most subjected to floods are areas situated
adjacent to rivers and streams, that are known as floodplain and therefore considered as “flood-prone”. These
areas are hazardous to development activities if the vulnerability of those activities exceeds an acceptable level.
The main objectives of this study are; to identify floodplains and other susceptible areas, and to assess the
extent of disaster impact in the study area which is located at Kota Tinggi, Johor, Malaysia. This area
experienced an unprecedented flood during December of 2006 to January of 2007.Questions such as how often
and how long the floodplain will be covered by water, and at what time of year flooding can be expected need to
be answered. Thus, an understanding of the dynamic nature of floodplains is greatly required. Multi-temporal
Radarsat-1images, Landsat ETM+ image, topographical maps and land use maps were used in this study for
the purpose of delineating the flood extend before, during and after the flood event. DEM acquired from
topographic map is used to derive flood depth. The final outputs of this study are flood extent and flood depth
maps where both of these maps show the impact of the flood to environment, lives and properties. This map is
also important and can be applied to develop a comprehensive relief effort immediately after flooding.
APPLICATIONS OF REMOTE SENSING AND GIS TECHNOLOGIES IN FLOOD RISK MANAGEMENTrsmahabir
Flooding is the most common of all major disasters that regularly affect populations and results in extensive damage to property, infrastructure, natural resources, and even to loss of life. To ensure better outcomes, planning and execution of flood management projects must utilize knowledge on a wide range of factors, most of which are of a spatial nature. Advances in geospatial technologies, specifically remote sensing and Geographic Information Systems (GIS), have enabled the acquisition and analysis of data about the Earth's surface for flood mitigation projects in a faster, more efficient and more accurate manner.
Remote sensing and GIS have emerged as powerful tools to deal with various aspects of flood management in prevention, preparedness and relief management of flood disaster. GIS facilitates integration of spatial and non-spatial data such as rainfall and stream flows, river cross sections and profiles, and river basin characteristics, as well as other information such as historical flood maps, infrastructures, land use, and social and economic data. Such data sets are critical for the in-depth analysis and management of floods.
Remote sensing technologies have great potential in overcoming the information void in the Caribbean region. The observation, mapping, and representation of Earth’s surface have provided effective and timely information for monitoring floods and their effect. The potential of new air- and space-borne imaging technologies for improving hazard evaluation and risk reduction is continually being explored. They are relatively inexpensive and have the ability to provide information on several parameters that are crucial to flood mapping and monitoring.
Remote Sensing Method for Flood Management SystemIJMREMJournal
Flood occurred when heavy and continuous rainfall exceeding the absorptive capacity of soil and the flow
capacity of rivers, streams, and coastal areas. Land areas that are most subjected to floods are areas situated
adjacent to rivers and streams, that are known as floodplain and therefore considered as “flood-prone”. These
areas are hazardous to development activities if the vulnerability of those activities exceeds an acceptable level.
The main objectives of this study are; to identify floodplains and other susceptible areas, and to assess the
extent of disaster impact in the study area which is located at Kota Tinggi, Johor, Malaysia. This area
experienced an unprecedented flood during December of 2006 to January of 2007.Questions such as how often
and how long the floodplain will be covered by water, and at what time of year flooding can be expected need to
be answered. Thus, an understanding of the dynamic nature of floodplains is greatly required. Multi-temporal
Radarsat-1images, Landsat ETM+ image, topographical maps and land use maps were used in this study for
the purpose of delineating the flood extend before, during and after the flood event. DEM acquired from
topographic map is used to derive flood depth. The final outputs of this study are flood extent and flood depth
maps where both of these maps show the impact of the flood to environment, lives and properties. This map is
also important and can be applied to develop a comprehensive relief effort immediately after flooding.
GIS is an essential technology for all phases of emergency management preparation, mitigation, response, and recovery. Find out how GIS provides a foundation for comprehensive emergency management .
To prepare for and mitigate emergencies, GIS can map and model potential disasters to help visualize critical vulnerabilities and damage consequences. As rebuilding begins, GIS aids local, state, and federal agencies with technology that supports collaboration between multiple agencies.
Field data captured with mobile GIS provides the ability to add updates from remote locations for more efficient incident management. It also supplies rapid damage assessment and more accurate recovery operations.
GWP - Flood Hazard Mapping for Small Island Developing States using GIS and L...Esri UK
Due to accelerating climatic and environmental changes, flood hazard modelling and mapping is an increasingly important issue. Flood hazard mapping in developing nations is often restricted to few areas and rarely available for national-scale infrastructure risk analysis and spatial planning, as traditional modelling approaches are inherently affected by increasing uncertainties and require a large number of datasets. In this session, learn how GWP Consultants overcame this difficulty using a simple GIS-based geomorphological approach, using Samoa as a case study. LiDAR-derived high-resolution Digital Elevation Models and ArcGIS analysis techniques were used to model and map flood hazards. Hear how Collector was used to assist with field activities (validating GIS-based flood hazard products and producing a drainage infrastructure database), significantly reducing time inputs. ArcGIS Online platform capabilities were used to deliver flood hazard products and improve risk communication to relevant stakeholders, including the Government of Samoa, World Bank, and United Nations Development Programme.
Disaster Management in Taiwan by using GIS technology.Pankaj Saini
Due to the particular geographical location and geological conditions, Taiwan suffers from many natural hazards, such as typhoons, flooding, landslides, land debris, and earthquakes.
which often cause series property damages and even life losses.
The sufferings and risks can be minimized by developing suitable strategies for disaster management.
Floods refer to huge amount of water reaching land in a short span of time, causing land surface to be submerged under water – at places, where, land surface is usually not covered with water.
Floods could be caused due to natural causes, or, human activities, or, a combination of both. Floods are caused by discharge of huge volume of water in a short span of time, at a rate, such that the water can not be carried away from the scene of discharge.
Flood Risk Assessment Using GIS Tools, By Dr. Omar Elbadawy, CEDARE, Land and Water Days in Near East & North Africa, 15-18 December 2013, Amman, Jordan
GIS is an essential technology for all phases of emergency management preparation, mitigation, response, and recovery. Find out how GIS provides a foundation for comprehensive emergency management .
To prepare for and mitigate emergencies, GIS can map and model potential disasters to help visualize critical vulnerabilities and damage consequences. As rebuilding begins, GIS aids local, state, and federal agencies with technology that supports collaboration between multiple agencies.
Field data captured with mobile GIS provides the ability to add updates from remote locations for more efficient incident management. It also supplies rapid damage assessment and more accurate recovery operations.
GWP - Flood Hazard Mapping for Small Island Developing States using GIS and L...Esri UK
Due to accelerating climatic and environmental changes, flood hazard modelling and mapping is an increasingly important issue. Flood hazard mapping in developing nations is often restricted to few areas and rarely available for national-scale infrastructure risk analysis and spatial planning, as traditional modelling approaches are inherently affected by increasing uncertainties and require a large number of datasets. In this session, learn how GWP Consultants overcame this difficulty using a simple GIS-based geomorphological approach, using Samoa as a case study. LiDAR-derived high-resolution Digital Elevation Models and ArcGIS analysis techniques were used to model and map flood hazards. Hear how Collector was used to assist with field activities (validating GIS-based flood hazard products and producing a drainage infrastructure database), significantly reducing time inputs. ArcGIS Online platform capabilities were used to deliver flood hazard products and improve risk communication to relevant stakeholders, including the Government of Samoa, World Bank, and United Nations Development Programme.
Disaster Management in Taiwan by using GIS technology.Pankaj Saini
Due to the particular geographical location and geological conditions, Taiwan suffers from many natural hazards, such as typhoons, flooding, landslides, land debris, and earthquakes.
which often cause series property damages and even life losses.
The sufferings and risks can be minimized by developing suitable strategies for disaster management.
Floods refer to huge amount of water reaching land in a short span of time, causing land surface to be submerged under water – at places, where, land surface is usually not covered with water.
Floods could be caused due to natural causes, or, human activities, or, a combination of both. Floods are caused by discharge of huge volume of water in a short span of time, at a rate, such that the water can not be carried away from the scene of discharge.
Flood Risk Assessment Using GIS Tools, By Dr. Omar Elbadawy, CEDARE, Land and Water Days in Near East & North Africa, 15-18 December 2013, Amman, Jordan
Attitudes toward suicide may influence the
treatment content and outcomes. Hence, this study aimed to
investigate how public attitudes toward suicide were influenced
by (1) their degree of idealism; and (2) their degree of
relativism. A questionnaire survey with Suicide Perception
Scale and Ethic Position Questionnaire was carried out on 50
male and 50 female participants (aged 21 and above) from
Klang Valley, Malaysia to obtain answer. The findings
supported both hypotheses, indicated that (1) higher idealism is
associated with lower level of acceptance toward suicide; and
(2) higher relativism is associated with higher level of
acceptance toward suicide. In sum, variations in public’s
attitude toward suicide were related to individual differences in
personal ethical ideologies and moral philosophies.
M-Commerce is the latest initiative by the mobile
internet technology. The movement of new technology has
become a trend in the market. The brand leaders in the market
always try several initiatives to capture the market as well as new
customers and m-commerce is the new way to the industry to link
with their customers easily. The need of mobile commerce to
businessman is very vital. The role of new technology was moving
very prompt in the market. The role of technology helps the
industry to promote their products for each mobile internet user
customer with the help of mobile applications and software. MCommerce
has an option to the mobile internet users to purchase
or order their products anytime with the help of mobile web. This
paper explores the role of mobile commerce in the new era of
technology. The role of mobile technology has already changed
the nature of customer vastly and e-commerce also provides the
root to m-commerce in its success.
Tonsillitis is a disease that can be found in every
part of the world. Moreover, it is one of the main causes
intervening for heart attack and pneumonia. It has been reported
that there are a large number of people having died because of
heart attack and pneumonia. To improve data transfer rates, this
paper proposes Gabor filter design with efficient noise reduction
and less power consumption usage is proposed in this paper.
Using textural properties of anatomical structures the filter
design is suitable for detecting the early stages of disease. The
code for Gabor filter will be developed in MATLAB
The present study was conducted at Lucknow
District in Uttar Pradesh. The purpose of this study is to
document how being perform in extra-curricular activities can
influence development in academics, social skills, and high school
completion. In this paper we study the possible influence of
extracurricular activities on student’s performance of eighth-and
ninth graders. 120 students of age group between 13 to 16 years
comprised the sample of the study. Self-made questionnaire for
school students were administered. Data was analyzed in term of
percentage and t-test analysis. The statistical analysis revealed
that all the 6 types of extracurricular activities, viz. Yoga, Horse
riding, Sport activities, Dance, Music and Indoor and outdoor
activities together showed significant role in some extracurricular
activities and Student’s performance of Government and Private
School. Students who participate in extracurricular activities
generally benefit from the many opportunities afforded them.
Benefits of participating in extracurricular activities included
having better grades, having higher standardized test scores and
higher educational attainment, attending school more regularly,
and having higher a higher self-concept. Those who participate in
out-of-school activities often have higher grade point averages, a
decrease in absenteeism, and an increased connectedness to the
school. Finally, we discuss the possible influence of
extracurricular activities on student’s performance and whether
such participation is advisable
A Broadband Wireless Access technology known as
Worldwide Interoperability for Microwave Access (WiMAX) is
based on IEEE 802.16 standards. It uses orthogonal frequency
division multiple accesses (OFDMA) as one of its multiple access
technique. Major design factors of OFDMA resource allocation are
scheduling and burst allocation. To calculate the appropriate
dimensions and location of each user’s data so as to construct the
bursts in the downlink subframe, is the responsibility of burst
allocation algorithm. Bursts are calculated in terms of number of
slots for each user. Burst Allocation Algorithm is used to overcome
the resource wastage in the form of unused and unallocated slots per
frame. It affects the Base station performance in mobile WiMAX
systems. In this Paper, HOCSA (Hybrid One Column Striping with
Non Increasing Area) algorithm is proposed to overcome frame
wastage. HOCSA is implemented by improving eOCSA algorithm
and is evaluated using MATLAB. HOCSA achieves significant
reduction of resource wastage per frame, leading to more
exploitation of the WiMAX frame.
Background: Because of its wonderful taste, as well as
numerous nutritional and medicinal qualities valued especially
in the 20th century apple fruit is preferred worldwide.
Objective: The current work presents the antioxidant
specifications of several varieties of apples distributed in
Republic of Bulgaria and also methodology/equipment and
method for the preparation of the apples for the experiment/
used to determine the antioxidant characteristics.
Methods: We use the following methods:
spectrophotometric method; systematic approach and a critical
analysis of the accessible Research Periodicals
Results: We obtain nectar from apples by their
immediate squeezing prior the experiment using a juicer. (1)
Mix the three tubes with electromagnetic stirrer VORTEX 2
GENIE for 10 seconds. (2) Place the tubes in a water bath for
10-15 minutes at 380C. (3) Put the tubes in cold water for 5
seconds to stop the reaction. (4.) Identification of the activity of
the samples with a UV-VIS spectrophotometer; ThermoScientific;
Used length λ = 560 nm.
CONCLUSION:
1. Choose fully ripe fruits to generate the highest
amount of antioxidants.
2. The studied varieties of apples can be arranged
according to their antioxidant activity as follows: Grey smith,
Aidere, Golden Delicious, Jonah Gold, Golden Delicious, Red
Delicious, Chadeo, Mutsu, and Florina
Data mining , knowledge discovery is the process
of analyzing data from different perspectives and summarizing it
into useful information - information that can be used to increase
revenue, cuts costs, or both. Data mining software is one of a
number of analytical tools for analyzing data. It allows users to
analyze data from many different dimensions or angles, categorize
it, and summarize the relationships identified. Technically, data
mining is the process of finding correlations or patterns among
dozens of fields in large relational databases. The goal of
clustering is to determine the intrinsic grouping in a set of
unlabeled data. But how to decide what constitutes a good
clustering? It can be shown that there is no absolute “best”
criterion which would be independent of the final aim of the
clustering. Consequently, it is the user which must supply this
criterion, in such a way that the result of the clustering will suit
their needs.
For instance, we could be interested in finding
representatives for homogeneous groups (data reduction), in
finding “natural clusters” and describe their unknown properties
(“natural” data types), in finding useful and suitable groupings
(“useful” data classes) or in finding unusual data objects (outlier
detection).Of late, clustering techniques have been applied in the
areas which involve browsing the gathered data or in categorizing
the outcome provided by the search engines for the reply to the
query raised by the users. In this paper, we are providing a
comprehensive survey over the document clustering.
We present a case of murder with a blunt object.
On the body of the deceased were identified specific traces in
the form of suffusions. Four people were suspected for the
murder. During the investigative four pairs of sneakers were
obtained. A full forensic examination was performed which
excluded three of the four pairs of suspected shoes. The forth
pair was a match. This kind of research is extremely important
in forensic practice and theory, as they allow forensic experts
to identify the objects that left specific traces on the body of a
victim or deceased. They are also extremely important during
investigation of criminal offenses, especially when there is more
than one suspect.
Flood is one of the natural disaster known to be part of the earth biophysical processes, which its occurrence can be devastating; due to mostly anthropogenic activities and climatological factors. The aim of the research is to identify and map the extent at which the impact of flood due to intense rainfall and rise in water in the study area using geospatial techniques and the specific objectives are to carry out terrain analysis of the study area and to generate flood indicator maps of the study area. The study analyzed rain fall data;, the drainage system and Shuttle Radar Topographic Mission (SRTM 30m) of the area. ArcGIS 10.8 was to modelled and to generate the contributing factors map of the study area. The drainage system was generated through on-screen digitization of topographic map of scale 1:50,000 of Ondo South-West. The mean annual rainfall of Lagos State was generated in the ArcGIS environment from the rainfall data through spatial analysis tool. The SRTM was used in terrain analysis of the study area. The results generated showed the lowest mean annual rain fall of the area 1,700mm and the highest mean annual rain fall was 2,440mm. Digital elevation model (DEM), slope, flow direction were generated from the SRTM. Drainage density of the area was generated using the drainage system. The slope map of the entire area which are classified into five slope classes of very high (14%-48.5%) to high (7.6%-13.9%) to moderately high (4.2%-7.6%) to low (1.5%-4.2%) and very low (0. % - 1.2%).
Development of a Modified Rational Model for Flood Risk Assessment of Imo Sta...theijes
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.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Flood Monitoring and Flood Risk Assessment in Agenebode, Edo State, NigeriaIJERA Editor
Flooding is a serious natural disaster that has become a recurrent event in many parts of the world causing huge loss of lives and properties. This study analyses flood risk potential in Agenebode, Edo state, Nigeria. Flood frequency analysis was carried out on discharge data from the River Niger at Onitsha from 1960-2006 as the discharge from this river is the primary cause of flooding of the study area. Log-Normal, Log-Pearson Type III and Gumbel probability distribution models were used to test for the most appropriate projection for discharge for different return periods.From the analysis, Log-normal distribution was selected as the most appropriate probability distribution for the series in order to determine projected flows for the river for different return periods. The rainfall pattern for the study area was analysed using gauge values for the period 1983-2010. Flood hazard assessment was carried out with the aid of ArcMap using the topographical feature data of the area, Digital Elevation Model obtained from Shuttle Radar Topographical Mission (SRTM) hole-filled seamless data and historical records of the previous flood occurrence. A flood hazard map produced indicated that about 1.8 km2 (72% of the total built-up area) of the area is at risk of flooding putting approximately 481 people at direct risk of flooding. This information is useful for providing ameliorative resources for the inhabitants in the event of a flood occurrence.
Remote sensing and Geographical Information System using for Water Resources ...AI Publications
Nowadays, studies on water resources management are quite important. This study on a subwatershed of the Bandama River in Côte d’Ivoire got a better understanding of the geomorphological characteristics of the study area. The use of satellite images and geographic information systems tools allowed to respond appropriately the management of water resources. The Digital Elevation Model (DEM) of the Farandougou subwatershed, the Bandama river hydrographic network and the geostatistical analysis of this subwatershed have been shown and interpreted in this study. The area’s elevation is between 0 and 700 meters approximatively. The value of river length minimum is around 11273.091 meters and the value of river length maximum is around 44415.180 meters, the coefficient of variation is around 0.462 for example. The geostatistic of Kohoua at Farandougou has given also mean of 449.621 meters, mediane of 441 meters, variance of 3040.996 meters and standard deviation of 55.145 meters. The majority of the Kohoua subwatershed area has an elevation around 410 meters versus the minority around 715 meters.
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology
Recent joint surgery studies reveal increased
revisions and resurfacing of the metal on metal hip joints. Metal
on metal hip implants were developed more than thirty years ago
and their application has been refined because of availability of
advanced manufacturing techniques and partly by advancements
in material science and engineering. Development of composite
materials may provide greater durability to metal-on-metal hip
implants .This review article is a study of the latest literature of
metal-on-metal hip implants and its various modeling techniques.
Numbers of methods are used for convergence and numerical
solution to investigate the performance of metal-on-metal hip
implant for accurate stable solution. This paper presents analysis
done by various researchers on metal-on-metal hip implants for
wear, lubrication, fatigue, bio-tribo-corrosion, design, toxicity
and resurfacing. After in vivo and in vitro studies, it is found that
all these methods have limitations. There is a need of more
insight for lubrication analysis, geometry of bearings, materials
and input parameters. The information provided in this work is
intended as an aid in the assessment of metal-on-metal hip joints.
Background Hospital contributes significantly tangible and intangible resources on a concurred plan by the scheduling of surgery on the OT list. Postponement decreases efficiency by declining throughput leads to wastage of resources hence burden to the nation. Patients and their family face economic and emotional implication due to the postponement. Postponement rate being a quality indicator controls check mechanism could be developed from the results. Postponement of elective scheduled operations results in inefficient use of the operating room (OR) time on the day of surgery. Inconvenience to patients and families are also caused by postponements. Moreover, the day of surgery (DOS) postponement creates logistic and financial burden associated with extended hospital stay and repetitions of pre-operative preparations to an extent of repetition of investigations in some cases causing escalated costs, wastage of time and reduced income. Methodology A cross-sectional study was done in the operation theaters of a tertiary care hospital in which total ten operation theaters of General Surgery Data of scheduled, performed and postponed surgeries was collected from all the operation theater with effect from March 1st to September 30th, 2018. A questionnaire was developed to find out the reasons for the postponement for all hospital’s stakeholders (surgeons, Anesthetist, Nursing Officer) and they were further evaluated time series analysis of scheduling of Operation Theater for moving average technique. Results Total 958 surgeries were scheduled and 772 surgeries performed were and 186 surgeries were postponed with a postponement rate of 19.42% in the cardiac surgery department during the study period. Month-wise postponement Rate exponential smoothing of time series data shows the dynamic of operating suits. To test throughput Postponement rate was plotted the postponed surgeries and on regression analysis is in a perfect linear relationship.
Introduction: Postponement of elective scheduled operations results in inefficient use of operating room (OR) time on the day of surgery. Inconvenience to patients and families also caused by postponements. Moreover, day of surgery (DOS) postponement creates logistic and financial burden associated with extended hospital stay and repetitions of pre-operative preparations to an extend of repetition of investigations in some cases causing escalated costs, wastage of time and reduced income. Methodology: A cross sectional study was done in the operation theaters of a tertiary care hospital in which total ten operation theaters of General Surgery Data of scheduled, performed and postponed surgeries was collected from all the operation theater with effect from march 1st to September 30th 2018. A questionnaire was developed to find out the reasons for the postponement for all hospital’s stakeholders (Surgeons, Anesthetist, Nursing officer) and they were further evaluated Time series analysis of scheduling of Operation Theater for Moving average Technique. Results: total 2,466 surgeries were scheduled and 1,980 surgeries were performed and 486 surgeries were postponed in the general surgery department during the study period. Month wise postponement forecast was in accordance with the performed surgeries and on regression analysis postponed surgeries were in perfect linear relationship with the postponement Rate.
In the present paper the experimental study of
Nanotechnology involves high cost for Lab set-up and the
experimentation processes were also slow. Attempt has also
been made to discuss the contributions towards the societal
change in the present convergence of Nano-systems and
information technologies. one cannot rely on experimental
nanotechnology alone. As such, the Computer- simulations and
modeling are one of the foundations of computational
nanotechnology. The computer modeling and simulations
were also referred as computational experimentations. The
accuracy of such Computational nano-technology based
experiment generally depends on the accuracy of the following
things: Intermolecular interaction, Numerical models and
Simulation schemes used. The essence of nanotechnology is
therefore size and control because of the diversity of
applications the plural term nanotechnology is preferred by
some nevertheless they all share the common feature of control
at the nanometer scale the latter focusing on the observation
and study of phenomena at the nanometer scale. In this paper,
a brief study of Computer-Simulation techniques as well as
some Experimental result
Solar cell absorber Kesterite- type Cu2ZnSnS4 (CZTS) thin films have been prepared by Chemical Bath Deposition (CBD). UV–vis absorption spectra measurement indicated that the band gap of as-synthesized CZTS was about1.68 eV, which was near the optimum value for photovoltaic solar conversion in a single-band-gap device. The polycrystalline CZTS thin films with kieserite crystal structure have been obtained by XRD. The average of crystalline size of CZTS is 27 nm
Multilevel inverters play a crucial part in the
areas of high and medium voltage applications. Among the three
main multilevel inverters used, the capacitor clamped multilevel
inverter(CCMLI) has advantage with respect to voltage
redundancies. This work proposes a switching pattern to improve
the performance of chosen H-bridge type CCMLI over
conventional CCMLI. The PWM technique used in this work is
Phase Opposition Disposition PWM(PODPWM). The
performance of proposed H-bridge type CCMLI is verified
through MATLAB-Simulink based simulation. It has been
observed that the THD is low in chosen CCMLI compared to
conventional CCMLI.
- In this paper, we introduce a practical mechanism of
compressing a binary phase code modulation (BPCM) signal
according to Barker code with 13 chips in presence of additive
white Gaussian noise (AWGN) by using a digital matched filter
(DMF) corresponding to time domain convolution algorithm of
input and reference signals using Cyclone II EP2C70F896C6
FPGA from ALTERA placed on education and development
board DE2-70 with the following parameters: frequency of
BPCM signal fIF=2 MHz, sampling frequency
f MHz SAM 50
,pulse period
T 200s
, pulse width
S 13sc
, chip width
CH 1sc
, compressing factor
KCOM 13
, SNRinp=1/1, 1/2, 1/3, 1/4, 1/5 and processing
gain factor SNRout/SNRinp=11.14 dB.
The results of filter operation are evaluated using a digital
oscilloscope GDS-1052U to display the input and output signals
for different SNRinp.
Without water, humans cannot live. Since time began,
we have lived by the water and vast tracts of waterless land have
been abandoned as it is too difficult to inhabit. At any given
moment, the earth’s atmosphere contains 4,000 cubic miles of
water, which is just 0.000012% of the 344 million cubic miles of
water on earth. Nature maintains this ratio via evaporation and
condensation, irrespective of the activities of man.
There is a certain need for an alternative to solve the water
scarcity. Obtaining water from the atmosphere is nothing new -
since the beginning of time, nature’s continuous hydrologic cycle
of evaporation and condensation in the form of rain or snow has
been the sole source and means of regenerating wholesome water
for all forms of life on earth.
An effective method to generate water is by the separation of
moisture present in air by condensation. In this study, the water
present in air is condensed on the surface of a container and then
collected in an external jacket provided on the container.
Insulations are provided to optimize the inner temperature of the
container.
The method is although uncommon but has certain advantages
which make it a success. The process is economical and does not
require a lot of utilities. It also helps in further reducing the
carbon footprint.
In every moment of functioning the Li-Ion
battery must provide the power required by the user, to have a
long operating life and to and to provide high reliability in
operation. The methods for analysis and testing batteries are
ensuring that all these conditions imposed to the batteries are
met by being tested depending on their intended use.
The success rate of real estate project is
decreasing as there is large scale of project and participation of
entities. It is necessary to study the risk factors involved in the
project. This paper focused on types of risks involved in the
project, risk factors, risk management tools & techniques.
Identification of risk of the project in terms of the total cost of the
project has been divided under Technical, Financial, Sociopolitical
and Statutory cost centers. Large real estate projects
have to tackle the following issues: land acquisition, skilledlabour
shortage, non-availability of skilled project managers, and
mechanization of the construction process to cater to the growing
demands. Non- availability of supporting infrastructure, political
issues like instability of the government leading to regulatory
issues, social issues, marketing forms an important part in these
projects as this is a onetime investment and the purchase cycle is
long , long development period makes the same project be at
different points in the real estate value cycle.
- In the present scenario carbon emission and sand
mining are major concern due to its hazardous effect to
environment and making serious imbalance to the ecosystem.
Various studies have been conducted to reduce severe effect on
environment, using byproducts like copper slag as partial
replacement of fine aggregate. Different researchers have also
revealed numerous uses of copper slag as a replacing agent in
determining the strength of concrete. A comprehensive review of
studies has been presented in this paper for scope of replacement
of fine aggregate from copper slag in concrete
- Security is a concept similar to being cautious
or alert against any danger. Network security is the condition of
being protected against any danger or loss. Thus safety plays a
important role in bank transactions where disclosure of any data
results in big loss. We can define networking as the combination
of two or more computers for the purpose of resource sharing.
Resources here include files, database, emails etc. It is the
protection of these resources from unauthorized users that
brought the development of network security. It is a measure
incorporated to protect data during their transmission and also
to ensure the transmitted is protected and authentic.
Security of online bank transactions here has been
improved by increasing the number of bits while establishing the
SSL connection as well as in RSA asymmetric key encryption
along with SHA1 used for digital signature to authenticate the
user
Background: Septoplasty is a common surgical
procedure performed by otolaryngologists for the correction of
deviated nasal septum. This surgery may be associated with
numerous complications. To minimize these complications,
otolaryngologists frequently pack both nasal cavities with
different types of nasal packing. Despite all its advantages,
nasal packing is also associated with some disadvantages. To
avoid these issues, many surgeons use suturing techniques to
obviate the need for packing after surgery.
Objective: To determine the efficacy and safety of trans-septal
suture technique in preventing complications and decreasing
morbidity after septoplasty in comparison with nasal packing.
Patients and methods: Prospective comparative study. This
study was conducted in the department of Otolaryngology -
Head and Neck Surgery, Rizgary Teaching Hospital - Erbil,
from the 6th of May 2014 to the 30th of November 2014.
A total of 60 patients aged 18-45 years, undergoing septoplasty,
were included in the study. Before surgery, patients were
randomly divided into two equal groups. Group (A) with transseptal
suture technique was compared with group (B) in which
nasal packing with Merocel was done. Postoperative morbidity
in terms of pain, bleeding, postnasal drip, sleep disturbance,
dysphagia, headache and epiphora along with postoperative
complications including septal hematoma, septal perforation,
crustation and synechiae formation were assessed over a follow
up period of four weeks.
Results: Out of 60 patients, 37 patients were males (61.7%)
and 23 patients were females (38.3%). Patients with nasal
packing had significantly more postoperative pain (P<0.05)><0.05). There was no significant difference between
the two groups with respect to nasal bleeding, septal
hematoma, septal perforation, crustation and synechiae
formation.
Conclusion: Septoplasty can be safely performed using transseptal
suturing technique without nasal packing.
The basic reason behind the need to
monitor water quality is to verify whether the examined
water quality is suitable for intended usage or not. This
study is conducted on Al -Shamiya al- sharqi drain in
Diwaniya city in Iraq to make valid assessment for the
level of parameters measured and to realize their effects
on irrigation. In order to assess the drainage water
quality for irrigation purposes with a high accuracy, the
Irrigation Water Quality Index (IWQI) will be examined
and upgraded (integrated with GIS) to make a
classification for drainage water. For this purpose, ten
samples of drainage water were taken from different ten
location of the stuay area. The collected samples were
analyzed chemically for different elements which affect
water quality for irrigation.These elements are :
Calcium(Ca+2), Sodium(Na+
), Magnesium(Mg+2),
Chloride( ), Potassium(K+
), Bicarbonate(HCO3),
Nitrate(NO3), Sulfate( , Phosphate( , Electrical
Conductivity(EC), Total Dissolved Solids (TDS), Total
Suspended Solids (TSS) and pH-values (PH). Sodium
Adsorption Ratio (SAR) and Sodium Content (Na%)
have been also calculated. Results suggest that, the use of
GIS and Water Quality Index (WQI) methods could
provide an extremely interesting as well as efficient tool
to water resource management. The results analysis of
(IWQI) maps confirms that: 52% of the drainage water
in study area falls within the "Low restriction" (LR) and
47%of study area has water with (Moderate
restriction)(MR),While 1% of drainage water in the
study area classified as (Sever restriction) (SR). So, the
drainage water should be used with the soil having high
permeability with some constraints imposed on types of
plant for specified tolerance of salts
The cable-hoisting method and rail cable-lifting
method are widely used in the construction of suspension bridge.
This paper takes a suspension bridge in Hunan as an example,
and expounds the two construction methods, and analyzes their
respective merits and disadvantages.
Baylis-Hillman reaction has been achieved on
different organic motifs but with completion times of three to
six days. Micellar medium of CTAB in water along with the
organic base DABCO has been used to effect the BaylisHillman
reaction on a steroidal nucleus of Withaferin-A for the
first time with different aromatic aldehydes within a day to
synthesize a library of BH adducts (W1a –W14a) and (W1bW14b)
as a mixture of two isomers and W15 as a single
compound. The isomers were separated on column and the
major components were chosen for bio-evaluation. Cytotoxic
activity of the synthesized compounds was screened against a
panel of four cancer cell lines Lung A-549, Breast MCF-7,
Colon HCT-116 and Leukemia THP-1 along with 5-florouracil
and Mitomycin-C as references. All the compounds exhibited
promising activity against screened cell lines and were found to
possess enhaunced activity than parent compound. BH adducts
with aromatic systems having methoxy and nitro groups were
found to be more active.
This paper presents the details on the
experimental investigation carried out to get the desired fresh
properties of the SCC. Tests were performed on various mixtures
to obtain the required SCC. In the present research work we
have replaced 15% of cement with class F fly ash. By varying the
quantity of water and sand the mortar mix was prepared. Later
varying percentage of coarse aggregate was added to the mortar
to obtain the desired SCC.
The batteries used in electric and hybrid vehicles
consists of several cells with voltages between 3.6V battery and
4.2 V in series or parallel combinations of configurations for
obtaining the necessary available voltages in the operation of a
hybrid electric vehicle. How malfunction of a single cell affects
the behavior of the entire battery pack, BMS main function is to
protect individual cells against over-discharge, overload or
overheating. This is done by correct balancing of the cells. In
addition BMS estimates the battery charge status
This project aims at using (PD-MCPWM) Phase
disposition multi carrier pulse width modulation technique to
reduce leakage current in a transformerless cascaded multilevel
inverter for PV systems. Advantages of transformerless PV
inverter topology is as follows, simple structure, low weight and
provides higher efficiency , but however this topology provides a
path for the leakage current to flow through the parasitic
capacitance formed between the PV module and the ground.
Modulation technique reduces leakage current with an added
advantage without adding any extra components.
Many people in Africa depend on water from
rivers and borehole, but purity of the drinking water from these
sources remains questionable. Mudzira River being the longest
River in a village called Vimtim located in Mubi North Local
government area in Adamawa State was studied in the months of
September to December, 2012 to ascertain the suitability of the
water for human consumption and other related uses. Five study
point: inlet (A, B), middle (C) and out let (D, E) were adopted for
monitoring the physico-chemical parameters using standard
procedures. The mean total temperature values were A (25.000C),
B (24.500C), C (25.500C), D (24.000C) and E (24.000C. Average P
H
values were A (8.00), B (7.87), C (8.20) D (8.37) and E (8.13). The
average conductivity values were A (73.90
1 cms
), B
(73.11
1 cms
), D (74.00
1 cms
) and E (73. 80
1 cms
). The
average total dissolves solid value of each sample were A (17.10),
B (17.10), C (20.00) D (21.64) and E (21.60.). The average
turbidity value of sample were A (47.00), B (47.00), C (50.00) D
(53.00) and E (50.00). Average total hardness value are A
(20.00mg/l), B (20.00mg/L) C (24.00mg/L), D (20.00mg/L) and E
(20.00mg/L). The average chloride content were A (12mg/L), B
(16mg/L), C (12 mg/L) D (16mg/L) and E (16mg/L). The average
calcium content were A (0.3mg/L) B (0.4mg/L), C (0.3mg/L), D
(0.3mg/L) and E (0.2mg/L). The average content of magnesium
were A (12mg/L), B (16mg/L), C (16Mg/L), D (12mg/L), E
(12mg/L). The lead content of River Mudzira water was
negligible. The mean coliform count were A (4), B (3), C (6), D
(7), and E (4).The values of the parameters studied were within
the WHO/NAFDAC recommended standards, excepts for total
coliform levels. In conclusion Vimtim residents consuming
untreated water from River Mudzira are potentially exposed to
possible acute, sub chronic or even chronic water borne diseases
like typhoid fever, dysentery, diarrhea etc.
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MODELLING THE IMPACT OF FLOODING USING GEOGRAPHIC INFORMATION SYSTEM AND REMOTE SENSING
1. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 3, Issue 4 (July-August 2015), PP. 67-72
67 | P a g e
MODELLING THE IMPACT OF FLOODING USING
GEOGRAPHIC INFORMATION SYSTEM AND
REMOTE SENSING
Ejikeme, J.O1; Igbokwe, J.I1; Ojiako, J.C1; Emengini, E.J1 and Aweh, D.S2
1
Department of Surveying and Geoinformatics, Nnamdi Azikiwe University, P.M.B 5025, Awka, Anambra State, Nigeria
2
Department of Surveying and Geoinformatics, Auchi Polytechnic, Auchi, Edo State, Nigeria
Email:ejikemejoseph2@yahoo.com
Abstract- Flooding is one of the most devastating natural
disasters in Nigeria. The impact of flooding on human activities
cannot be overemphasized. It can threaten human lives, their
property, environment and the economy. Different techniques
exist to manage and analyze the impact of flooding. Some of these
techniques have not been effective in management of flood
disaster. Remote sensing technique presents itself as an effective
and efficient means of managing flood disaster. In this study,
SPOT-10 image was used to perform land cover/ land use
classification of the study area. Advanced Space borne Thermal
Emission and Reflection Radiometer (ASTER) image of 2010 was
used to generate the Digital Elevation Model (DEM). The image
focal statistics were generated using the Spatial Analyst/
Neighborhood/Focal Statistics Tool in ArcMap. The contour map
was produced using the Spatial Analyst/ Surface/ Contour Tools.
The DEM generated from the focal statistics was reclassified into
different risk levels based on variation of elevation values. The
depression in the DEM was filled and used to create the flow
direction map. The flow accumulation map was produced using
the flow direction data as input image. The stream network and
watershed were equally generated and the stream vectorized. The
reclassified DEM, stream network and vectorized land cover
classes were integrated and used to analyze the impact of flood on
the classes. The result shows that 27.86% of the area studied will
be affected at very high risk flood level, 35.63% at high risk,
17.90% at moderate risk, 10.72% at low risk, and 7.89% at no
risk flood level. Built up area class will be mostly affected at very
high risk flood level while farmland will be affected at high risk
flood level. Oshoro, Imhekpeme, and Weppa communities will be
affected at very high risk flood inundation while Ivighe, Uneme,
Igoide and Iviari communities will be at risk at high risk flood
inundation level. It is recommended among others that buildings
that fall within the “Very High Risk” area should be identified
and occupants possibly relocated to other areas such as the “No
Risk” area.
Keyword- Flooding, Remote sensing, GIS, Risk
I. INTRODUCTION
Over the past decades, the pattern of floods across all
continents has been changing, becoming more frequent,
intense and unpredictable for local communities, particularly
as issues of development and poverty have led more people to
live in areas vulnerable to flooding [1]. Flood by nature are
complex events caused by a range of human vulnerabilities,
inappropriate development planning and climate variability
[2]. A UN HABITAT Report in 2010 predicted that “more
than 25% of Africa’s population living within 100km from the
coast will be at risk from sea level rise and coastal flooding
within the next decade 2010-2020” and recommended
immediate adoption of mitigation measures to reduce
vulnerability [3]. It has been reported that developing
countries like Nigeria will be more vulnerable to climate
change due to its economic, climatic and geographic setting
[4].
In 2012, Nigeria witnessed the most devastating effect of
flooding. The flood event affected about 13 States: Niger,
Benue, Edo, Kogi, Anambra, Ebonyi, Ondo, Imo, Bayelsa,
Delta, Rivers, Adamawa etc. The flooding was triggered by
intentional opening of the Lagdo Dam in Cameroon to release
excess rain water caused by climate change from the Dam.
This action caused huge socio-economic loss to Nigeria
especially residents of Edo State.
Several techniques have been used to map flood hazard
and risks. The conventional technique is mostly through the
use of information on historical floods, soil maps, aerial
photographs, hydrological modeling of the major rivers, use of
National Digital Terrain Model (DTM) and water levels [5].
These techniques have not been able to provide sufficient
information needed for management of flood disasters.
There is therefore need to develop a more effective and
efficient approach of monitoring, mapping and modeling of
flood risk and hazards. Remote sensing and GIS provides a
useful means of modeling flood disaster. It provides a rapid
response data source for mapping of flood disaster. GIS is a
powerful tool that enables the integration of spatial data such
as land use and land cover, topography, soil, hydrography,
geology, utility e.t.c on a common platform. GIS also enables
photographs of flood disaster areas to be hyperlinked with
spatial database for a more visual understanding and
documentation of the disaster area. This potential of GIS,
when combined with Remote sensing satellite image provides
a very flexible platform for modeling and analysis of any
environmental phenomenon and for providing sustainable and
profitable solutions to environmental management.
This research seeks to model and analyze the risk and
impact of flooding using GIS and satellite remote sensing
images.
A. The Study Area
The area selected for this study is located in Edo state,
South-south Nigeria. The geographic location is
approximately between latitudes 6o
34’N and 6o
43’N and
longitudes 7o
04’E and 7o
13’E (see fig. 1). Early rainfall occurs
usually in January/February with full commencement of rainy
season in March and stopping in November of each year. The
dry season commences from November and ends in February.
Edo state has 8.01% of its terrain covered by upland; 85.74%
lowlands and 6.25% as wetlands [2].
2. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 3, Issue 4 (July-August 2015), PP. 67-72
68 | P a g e
Fig. 1a: Map of Africa Showing Nigeria; Fig1b: Map of Nigeria Showing Edo State and Fig.1c: Image window of the Study
Area.
1a
1b
1c
3. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 3, Issue 4 (July-August 2015), PP. 67-72
69 | P a g e
II. MATERIALS AND METHODS
The method employed for the study is illustrated in figure 2.
Fig. 2: Work Flow Diagram of the Methodology adopted
The SPOT-10 image which was in geographic coordinate
system was exported to ERDAS Imagine 9.2 software. The
image which has been processed was checked for line dropout,
line banding effect and noise to ensure its usage.
A pre- classification visits to the site was carried out and the
following classes were adopted; Water body, Farmland, Built-
up Area, Vegetation, Wetland and Open space. To begin the
classification proper in ERDAS Imagine, sample set was
selected using the Area of Interest (AOI) tool. The signature
editor table was opened to add the AOI as a signature. Name
and colour were assigned to the AOI class. Feature space layer
was created from the signature editor menu bar. Other AOI
classes were created and added as signatures. The feature
space was masked to image space. Supervised classification
method was used to classify the image. The feature space and
maximum likelihood were selected as the non-parametric rule
and parametric rule respectively.
The classified image was exported to ArcGIS 10 software.
The accuracy of the classified image was checked by plotting
the coordinates of the remaining ground truth data not used in
the classification process into the classified image. The result
4. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 3, Issue 4 (July-August 2015), PP. 67-72
70 | P a g e
shows a high correlation and the classes vectorized into
polygons.
The ASTER image was exported to ArcGIS 10 environment
and the depression in the sink filled. The image focal statistics
were generated using the Spatial Analyst/ Neighborhood/Focal
Statistics Tool in ArcMap. The contour map was produced
using the Spatial Analyst/ Surface/ Contour Tools. The DEM
generated from the focal statistics was reclassified into
different risk levels based on variation of elevation values.
The depression in the DEM was filled and used to create the
flow direction map. The flow accumulation map was produced
using the flow direction data as input image. The stream
network and catchment area were delineated.
The reclassified DEM, stream network and vectorized land
cover classes were integrated and used to analyze the impact
of flood on the classes.
A. Discussions of results
The classified map was exported to ArcGIS 10 where
they were vectorized as polygon. The vectorized feature
classes of the study area is shown in figure 3.0
Fig. 3.0: Vectorized feature classes of the study area.
The result shows that most of the study area is occupied by
farmland; followed by built-up area. The built up area
comprises of buildings and road networks. A high
concentration of human activities is represented by built-up
areas class in the study area. The implication of this is that if
more runoff is generated than the drainage or river channel
can accommodate as a result of increased paved surfaces, the
water will overtop the drainage channel or river and flows into
buildings or floodplain.
The DEM of the study area was reclassified and the result is
shown in fig. 3.1
Fig. 3.1: Reclassified DEM of the study area.
The result shows that topography of the area reclassified as
‘very high risk’ falls mostly on the right hand side of the map
and the risk level decreases as we move towards the left hand
side of the study area.
The result shows that topography of the area reclassified as
‘very high risk’ falls mostly on the right hand side of the map
and the risk level decreases as we move towards the left hand
side of the study area.
The DEM was used to generate the flow direction map. The
flow accumulation map derived from the flow direction data is
shown in fig. 3.2
Fig. 3.2: Flow accumulation map of the study area.
Cells having flow accumulation values of zero generally
correspond to areas with high elevation values whereas cells
with high flow accumulation values shown white in the map
correspond to stream courses. The stream courses were
extracted from the flow accumulation data and the result is
shown in figure 3.3
5. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 3, Issue 4 (July-August 2015), PP. 67-72
71 | P a g e
Fig. 3.3: Stream courses within the Study Area
To further appreciate the effectiveness of GIS and remote
sensing, the DEM was converted to point feature and the
coordinates of the point files generated. The generated
coordinates was exported to Surfer 8 software and used to
generate the 3D surface model and flow direction map of the
study area. This is shown in fig. 3.4 and 3.5 respectively.
Fig. 3.4: 3D Surface Model of the Study Area
Fig. 3.5: Flow Direction Map of the Study Area
Table 1.0 shows the different risk levels derived from the
DEM and their percentage of coverage.
Table 1.0: Flood Risk Level and percentage coverage of
the study area.
S/No Risk Area
(Km2
)
% of the
Area
1 Very High Risk 91118 27.86
2 High Risk 116531 35.63
3 Moderate Risk 58539 17.90
4 Low Risk 35078 10.72
5 No Risk 25837 7.89
Total 327103 100
The reclassified DEM was vectorized into polygon. The
different flood risk levels were integrated with the land cover
classes through the intersect tool of the overlay analysis. The
essence of this analysis was to know the land cover types that
will be affected at different level of flood risk. For example,
fig. 3.6 and 3.7 shows the result of intersect analysis between
“Very High Risk” and “Built_Up_Area” and “High Risk” and
“Farmland” respectively.
Fig. 3.6: Overlay analysis of “Very High Risk” flood level
and “Built_Up_Area” land cover class
Fig. 3.7: Overlay analysis of “High Risk” flood level and
“Farmland” land cover class.
6. International Journal of Technical Research and Applications e-ISSN: 2320-8163,
www.ijtra.com Volume 3, Issue 4 (July-August 2015), PP. 67-72
72 | P a g e
III. CONCLUSION
Satellite images have shown the capabilities to extract
relevant information needed to model and manage the impact
of flood. ASTER image was used to extract the elevation
information while SPOT-10 image was used to generate the
land use/ land cover classes. The derived data were integrated
through series of analysis in order to determine the land cover
classes that will be at risk at varied degree of flood level.
The result revealed the various land cover classes that will be
at risk at various categories of flood level. Oshoro,
Imhekpeme and Weppa communities will be at risk at very
high risk flood inundation while Ivighe, Uneme, Igoide and
Iviari will be at risk at high risk flood inundation. Also, the
stream network generated shows the location of the stream
channels and the classes that may be affected as a result of
overflow of water at the stream channels.
IV. RECOMMENDATIONS
Based on the results and analysis obtained, the following
recommendations were made:
i. It is recommended that occupiers of buildings that
fall within the very high risk flood inundation areas
should be identified and possibly relocates the
occupants to a higher ground elevation to avoid
severe flood disaster.
ii. Presence of high concentration of stream channel in
the area makes the area suitable for rice farming and
other irrigation farming.
iii. Further research should be carried out in this area
using radar satellite and very high resolution
imagery such as Terra-SAR and Quickbird image
respectively.
REFERENCES
[1]. Alam, K; Herson, M and Donnel, I (2008). Flood Disasters:
Learning from previous Relief and Recovery Operations.
Prevention Consortium and ALNAP. Pp.3
[2]. Fabiyi, O.O., Adagbasa, G.E., Efosa, O and Enaruvbe, G.O
(2012). Flood Risk and Vulnerability Analysis in Ibadan
and Environs. In: B, Ayeni and O, Fabiyi (Eds): Geospatial
Technologies & Digital Cartography for National Security,
Tourism and Disaster Management. Proceedings of joint
Conference of Geoinformation Society of Nigeria &
Nigerian Cartographic Association.
[3]. Nwilo. P.C (2012). Survey Practice in the Nigerian
Contemporary Society. Paper Presented on the Occasion of
the Opening and Dedication of ‘Surveyors House’ of
Nigerian Institution of Surveyors (NIS), Enugu State
Branch.
[4]. IPCC (Intergovernmental Panel on Climate Change)
(2007). Climate Change 2007: Impacts, Adaptation and
Vulnerability Contribution of Working Group II to the
Third Assessment Report of the Intergovernmental Panel
on Climate Change. Edited by M.L Parry et al, Cambridge
Univ. Press, Cambridge, UK.
[5]. Ojigi, L.M and Shaba, H.A (2012). Integration of Synthetic
Aperture Radar (SAR) Imagery and Digital Terrain Model
for Determining Flood Water Threshold in Sokoto and
Environs, Nigeria (2012). In: B, Ayeni and O, Fabiyi (Eds):
Geospatial Technologies & Digital Cartography for
National Security, Tourism and Disaster Management.
Proceedings of joint Conference of Geoinformation Society
of Nigeria & Nigerian Cartographic Association.