Analysis of Annual Rainfall Climate Variability in Saudi Arabia by Using Spectral Density Function. The 5th International Conference on Water Resources and Arid Environments, January 6-9, 2013.
Modelling monthly rainfall time series using Markov ChainsAmro Elfeki
Modeling Monthly Rainfall Records in Arid Zones Using Markov Chains: Saudi Arabia Case Study, the 4th International Conference on Water Resources and Arid Environments, December, 2010, pp.141-146.
Modeling Monthly Rainfall Records in Arid Zones Using Markov Chains: Saudi Ar...Amro Elfeki
Modeling Monthly Rainfall Records in Arid Zones Using Markov Chains: Saudi Arabia Case Study, the 4th International Conference on Water Resources and Arid Environments, December, 2010, pp.141-146.
Water Resources in Urban Setting: The Case of the City of JeddahAmro Elfeki
Presentation at the workshop on Soil, Water and Coastal Resources, 16-17 Oct., 2008, organized by KUAST (King Abdullal University of Science and Technology), held at Jeddah Hilton, Jeddah, KSA
FPGA Implementation of Mixed Radix CORDIC FFTIJSRD
In this Paper, the architecture and FPGA implementation of a Coordinate Rotation Digital Computer (CORDIC) pipeline Fast Fourier Transform (FFT) processor is presented. Fast Fourier Transforms (FFT) is highly efficient algorithm which uses Divide and Conquer approach for speedy calculation of Discrete Fourier transform (DFT) to obtain the frequency spectrum. CORDIC algorithm which is hardware efficient and avoids the use of conventional multiplication and accumulation (MAC) units but evaluates the trigonometric functions by the rotation of a complex vector by means of only add and shift operations. We have developed Fixed point FFT processors using VHDL language for implementation on Field Programmable Gate Array. A Mixed Radix 8 point DIF FFT/IFFT architecture with CORDIC Twiddle factor generation unit with use of pipeline implementation FFT processor has been developed using Xilinx XC3S500E Spartan-3E FPGA and simulated with maximum frequency of 157.359 MHz for 16 bit length 8 point FFT. Results show that the processor uses less number of LUTs and achieves Maximum Frequency.
Spektralanalyse am technologischen Limit: Anwendungen in der Radioastronomie
Wo Prozessoren in ihrer Leistungsfähigkeit nicht mehr ausreichen, wird programmierbare Logik in Form von FPGAs (Field Programmable Gate Arrays) eingesetzt. Hunderte von Rechenoperationen können damit innert Nanosekunden erledigt werden. Diese Technologie eignet sich vorzüglich für die Echtzeit-Spektralanalyse von Signalen.
Typische Anwendungen finden sich in der Radioastronomie oder der Atmosphärenphysik. Typisch sind die enormen Abtastraten von mehreren Giga-Samples pro Sekunde bei Wandler-Auflösungen von ³ 10 Bit, Signal-Bandbreiten von > 1 GHz, aufgelöst in ³ 16'384 Kanälen. Die Leistungsgrenze wird in diesen Bereichen stetig nach oben geschoben.
Mit dem präsentierten Projekt wurde ein neuer Meilenstein punkto Funktionalität und Verarbeitungsgeschwindigkeit gesetzt. So ist das realisierte Spektrometer 1- oder 2-kanalig konfigurierbar, in der 2-kanaligen Version können beispielsweise die Summen- und Differenzspektren gerechnet werden, oder das Kreuzleistungs-Spektrum. Anstelle der "normalen" Fast Fourier Transform (FFT) wurde eine digitale Filterbank implementiert.
Im Vortrag werden aktuelle und künftige Anwendungen im Bereich der Radioastronomie vorgestellt. Es sind Anlagen und Projekte, die weltweit in Betrieb sind oder in Planung stehen. Messresultate zeigen die enorme Leistungsfähigkeit, aber auch die Grenzen der digitalen Spektralanalyse.
Bruno Stuber, Hochschule für Technik FHNW und Christian Monstein, ETH Zürich
Implementation of Efficiency CORDIC Algorithmfor Sine & Cosine GenerationIOSR Journals
Abstract: This paper presents an area-time efficient coordinate rotation digital computer (CORDIC) algorithm that completely eliminates the scale-factor. A generalized micro-rotation selection technique based on high speed most-significant-1-detection obviates the complex search algorithms for identifying the micro-rotations. This algorithm is redefined as the elementary angles for reducing the number of CORDIC iterations. Compared to the existing re-cursive architectures the proposed one has 17% lower slice-delay product on Xilinx Spartan XC2S200E device. The CORDIC processor pro-vides the flexibility to manipulate the number of iterations depending on the accuracy, area and latency requirements. Index Terms—coordinate rotation digital computer (CORDIC), cosine/sine, field-programmable gate array(FPGA),most-significant-1, recursive architecture.
Contextualizing the Visualization of Climate DataRaquel Alegre
EGU 2014, 27th April - 2nd May 2014, Vienna (Austria)
Session: Techniques and tools for effective visualization and sonification in the geosciences
Category: Earth & Space Science Informatics (ESSI)
Modelling monthly rainfall time series using Markov ChainsAmro Elfeki
Modeling Monthly Rainfall Records in Arid Zones Using Markov Chains: Saudi Arabia Case Study, the 4th International Conference on Water Resources and Arid Environments, December, 2010, pp.141-146.
Modeling Monthly Rainfall Records in Arid Zones Using Markov Chains: Saudi Ar...Amro Elfeki
Modeling Monthly Rainfall Records in Arid Zones Using Markov Chains: Saudi Arabia Case Study, the 4th International Conference on Water Resources and Arid Environments, December, 2010, pp.141-146.
Water Resources in Urban Setting: The Case of the City of JeddahAmro Elfeki
Presentation at the workshop on Soil, Water and Coastal Resources, 16-17 Oct., 2008, organized by KUAST (King Abdullal University of Science and Technology), held at Jeddah Hilton, Jeddah, KSA
FPGA Implementation of Mixed Radix CORDIC FFTIJSRD
In this Paper, the architecture and FPGA implementation of a Coordinate Rotation Digital Computer (CORDIC) pipeline Fast Fourier Transform (FFT) processor is presented. Fast Fourier Transforms (FFT) is highly efficient algorithm which uses Divide and Conquer approach for speedy calculation of Discrete Fourier transform (DFT) to obtain the frequency spectrum. CORDIC algorithm which is hardware efficient and avoids the use of conventional multiplication and accumulation (MAC) units but evaluates the trigonometric functions by the rotation of a complex vector by means of only add and shift operations. We have developed Fixed point FFT processors using VHDL language for implementation on Field Programmable Gate Array. A Mixed Radix 8 point DIF FFT/IFFT architecture with CORDIC Twiddle factor generation unit with use of pipeline implementation FFT processor has been developed using Xilinx XC3S500E Spartan-3E FPGA and simulated with maximum frequency of 157.359 MHz for 16 bit length 8 point FFT. Results show that the processor uses less number of LUTs and achieves Maximum Frequency.
Spektralanalyse am technologischen Limit: Anwendungen in der Radioastronomie
Wo Prozessoren in ihrer Leistungsfähigkeit nicht mehr ausreichen, wird programmierbare Logik in Form von FPGAs (Field Programmable Gate Arrays) eingesetzt. Hunderte von Rechenoperationen können damit innert Nanosekunden erledigt werden. Diese Technologie eignet sich vorzüglich für die Echtzeit-Spektralanalyse von Signalen.
Typische Anwendungen finden sich in der Radioastronomie oder der Atmosphärenphysik. Typisch sind die enormen Abtastraten von mehreren Giga-Samples pro Sekunde bei Wandler-Auflösungen von ³ 10 Bit, Signal-Bandbreiten von > 1 GHz, aufgelöst in ³ 16'384 Kanälen. Die Leistungsgrenze wird in diesen Bereichen stetig nach oben geschoben.
Mit dem präsentierten Projekt wurde ein neuer Meilenstein punkto Funktionalität und Verarbeitungsgeschwindigkeit gesetzt. So ist das realisierte Spektrometer 1- oder 2-kanalig konfigurierbar, in der 2-kanaligen Version können beispielsweise die Summen- und Differenzspektren gerechnet werden, oder das Kreuzleistungs-Spektrum. Anstelle der "normalen" Fast Fourier Transform (FFT) wurde eine digitale Filterbank implementiert.
Im Vortrag werden aktuelle und künftige Anwendungen im Bereich der Radioastronomie vorgestellt. Es sind Anlagen und Projekte, die weltweit in Betrieb sind oder in Planung stehen. Messresultate zeigen die enorme Leistungsfähigkeit, aber auch die Grenzen der digitalen Spektralanalyse.
Bruno Stuber, Hochschule für Technik FHNW und Christian Monstein, ETH Zürich
Implementation of Efficiency CORDIC Algorithmfor Sine & Cosine GenerationIOSR Journals
Abstract: This paper presents an area-time efficient coordinate rotation digital computer (CORDIC) algorithm that completely eliminates the scale-factor. A generalized micro-rotation selection technique based on high speed most-significant-1-detection obviates the complex search algorithms for identifying the micro-rotations. This algorithm is redefined as the elementary angles for reducing the number of CORDIC iterations. Compared to the existing re-cursive architectures the proposed one has 17% lower slice-delay product on Xilinx Spartan XC2S200E device. The CORDIC processor pro-vides the flexibility to manipulate the number of iterations depending on the accuracy, area and latency requirements. Index Terms—coordinate rotation digital computer (CORDIC), cosine/sine, field-programmable gate array(FPGA),most-significant-1, recursive architecture.
Contextualizing the Visualization of Climate DataRaquel Alegre
EGU 2014, 27th April - 2nd May 2014, Vienna (Austria)
Session: Techniques and tools for effective visualization and sonification in the geosciences
Category: Earth & Space Science Informatics (ESSI)
Climate Data Sharing for Urban Resilience - OGC Testbed 11George Percivall
OGC Testbed 11:
Delivering on our commitment to the Climate Data Initiative
In December 2014 the US White House Office of Science and Technology (OSTP) released a Policy Fact Sheet titled "Harnessing Climate Data to Boost Ecosystem & Water Resilience." The Fact Sheet includes OGC’s commitment to increase open access to climate change information using open standards. Testbed 11 results are now available delivering on that commitment.
The results of this major interoperability testbed contribute to development and refinement of international standards that are critical for the communication and integration of geospatial information. http://www.opengeospatial.org/projects/initiatives/testbed11
• Nine sponsors provided requirements and funding for Testbed 11.
• Thirty organizations participated in Testbed 11 by contributing prototypes, engineering
reports and participating in a scenario driven demonstration of the technical advances Technical results of Testbed 11 relevant to the Climate Data Initiative include:
• Analysis and prediction based on open climate data accessed using open standards
• Making predictive models more accessible with OGC Web Processing Service (WPS)
• Verifying model predictions using mobile operations, in-situ gauges and social media.
Climate adaptation, resilience and security planning based on technology from OGC Testbed 11:
• Estimating geographic extend of coastal inundation in dynamic weather conditions
• Assessing social unrest with displaced population due to climate change
• Integrating spatial and non-spatial models of human geography and resilience
• Predictive models and verifications to support planning and response phases
Interpreting Climate Data - Analysing climate vulnerability- online training ...Vestlandsforsking WRNI
Interpreting Climate Data
This module provides an introduction to climate data and how to effectively use it. The following will be covered:
How regionalised climate data is produced
How to understand and interpret regionalised climate data
How to identify and communicate uncertainties
Presentation by Jacob van Etten.
CCAFS workshop titled "Using Climate Scenarios and Analogues for Designing Adaptation Strategies in Agriculture," 19-23 September in Kathmandu, Nepal.
Edwards climate data detectives - yale 2-2015Paul Edwards
Talk to the Yale History of Science/History of Medicine group on 9 Feb 2015. Discusses evolving knowledge infrastructures, the history of weather and climate data, and several recent controversies over climate data. "Data detectives" refers to the forensic work involved in adjusting data for changes in instrument characteristics, location, etc.
ICLR Friday Forum: Climate data in Ontario (November 13, 2015)glennmcgillivray
Preparing for the anticipated effects of climate change intuitively suggests that we need the best possible understanding and quantification of those effects. However, it can be challenging for practitioners to navigate the world of climate data. Not only can it be difficult to obtain information about our past and future climate and to discern which of the many sources should be used, but it is also a challenge to understand the limitations of the data and how it can be used appropriately and defensibly. The presentation described the current state and availability of climate data in Ontario, which is an illustrative case typical of most Canadian jurisdictions. The many sources of historic and future climate data were described, along with a discussion about the pitfalls of pursuing precision in climate data when its application is inherently uncertain.
Ryan Ness is Senior Manager of Research and Development at the Toronto and Region Conservation Authority. In this role, he is responsible for developing policy and technical solutions that allow the Authority to fulfill its water resources and ecological conservation mandate in the face of new and emerging challenges, including climate change. Ryan is a professional engineer with 16 years experience, 12 of which have been with the TRCA. He is currently pursuing a PhD in sustainability studies at the University of Waterloo.
ESRI User Conference 2014 - A Location Aware Mobile Tool for Direct and Indir...Francisco Ramos
Access to GIS data from mobile platforms continues to be a challenge and there is a wide range of fields where it is extremely useful. In this work, we combined three key aspects: climate data sensors, mobile platforms and spatial proximity operations. We published and made use of a web 2.0 network of climate data, where content is user-collected, by means of their meteorological stations, and exposed as available information for the virtual community. Moreover, we enriched this data by giving the users the opportu- nity to directly inform the system with different climate measures. In general, management of this type of information from a mobile application could result in an important decision tool, as it enables us to provide climate-related data according to a context and a geographical location. Therefore, we imple- mented a native mobile application for iPhone and iPad platforms by using ArcGIS SDK for iOS and by integrating a series of ArcGIS webmaps, which allows us to perform geospatial queries based on the user’s location, offering, at the same time, access to all the data provided by the climate data sensor network and from direct users.
Publication and long term archival of observational data in the field of environmental sciences is a challenging topic of today's eScience research. The amount of effort that goes into technical and scientific quality assurance prior to publication is considerable and might well turn out to be a barrier to data publication. Our project's goal is to lower the amount of manual effort and, at the same time, increase data quality in the process of submitting observational data for publication – in this case meteorological observational data. This goal is divided into the following subgoals:
Establish a standard procedure for the publication of observational data in the area of meteorology including quality information.
Develop a workflow system for the automatisation of the publication process.
Make the procedure usable for environmental sciences in general.
Integration of the procedure into an existing central data repository for meteorology (CERA data base at the World Data Center for Climate).
This talk is about the current state of the project from an eResearch and technical point of view.
Collaborate 2012: Environmental Accounting and ReportingAngela Miller
Presentation on the implementation of Oracle's Environmental Accounting and Reporting (EAR) module in JD Edwards. As more entities desire to self-report to The Climate Registry and the Global Reporting Initiative, tools like EAR will become imperative for their organizations to automate the data collection.
These visuals were prepared to support a string quartet performance and panel on climate change at Northwestern University in February 2106.
A well-designed graphic can help audiences to quickly understand the main message embedded within a complex set of climate data and to retain those ideas longer than they would have if they were conveyed by words alone. But the visual aids used regularly by climate scientists also have their limitations: they are most easily understood by people who are already fluent in technical illustrations; they're usually static and sometimes do not tell an obvious story; and for many, they don't elicit a strong emotional response.
Music, by contrast, is inherently narrative and is known to exert a powerful influence on human emotions. Because of this, sonification — the transformation of data into acoustic signals — may have considerable promise as a tool to enhance the communication of climate science.
Daniel Crawford and Scott St. George report on a collaboration between scientists and artists that uses music to transmit the evidence of climate change in an engaging and visceral way.
Big Data and the Climate/Environment domain (vis-a-vis the respective H2020 Societal Challenge) - Opportunities, Challenges and Requirements. As presented and discussed in the public launch of the BigDataEurope project.
Weekly Rainfall Analysis for Crop Planning Using Markov’s Chain Model for Kan...IJERA Editor
Weekly rainfall analysis of Kandhamal district during the period of 1965 to 2010 were taken for analysis purpose, the analysis is very much important for crop planning and analyzing the probability of occurrence of dry and wet periods. This will act as bench mark for crop planning as well as sustainable agricultural management of Kandhamal district which comes under the agro-climatic zone of East-coast hill region. Markov chain model has been utilized to derive the probability of dry or wet weeks and also forward and backward accumulation of rain water suitable for crop production. This analysis can be helpful to find out different cropping system including intercropping and sequence cropping suitable during that period.
Climate Data Sharing for Urban Resilience - OGC Testbed 11George Percivall
OGC Testbed 11:
Delivering on our commitment to the Climate Data Initiative
In December 2014 the US White House Office of Science and Technology (OSTP) released a Policy Fact Sheet titled "Harnessing Climate Data to Boost Ecosystem & Water Resilience." The Fact Sheet includes OGC’s commitment to increase open access to climate change information using open standards. Testbed 11 results are now available delivering on that commitment.
The results of this major interoperability testbed contribute to development and refinement of international standards that are critical for the communication and integration of geospatial information. http://www.opengeospatial.org/projects/initiatives/testbed11
• Nine sponsors provided requirements and funding for Testbed 11.
• Thirty organizations participated in Testbed 11 by contributing prototypes, engineering
reports and participating in a scenario driven demonstration of the technical advances Technical results of Testbed 11 relevant to the Climate Data Initiative include:
• Analysis and prediction based on open climate data accessed using open standards
• Making predictive models more accessible with OGC Web Processing Service (WPS)
• Verifying model predictions using mobile operations, in-situ gauges and social media.
Climate adaptation, resilience and security planning based on technology from OGC Testbed 11:
• Estimating geographic extend of coastal inundation in dynamic weather conditions
• Assessing social unrest with displaced population due to climate change
• Integrating spatial and non-spatial models of human geography and resilience
• Predictive models and verifications to support planning and response phases
Interpreting Climate Data - Analysing climate vulnerability- online training ...Vestlandsforsking WRNI
Interpreting Climate Data
This module provides an introduction to climate data and how to effectively use it. The following will be covered:
How regionalised climate data is produced
How to understand and interpret regionalised climate data
How to identify and communicate uncertainties
Presentation by Jacob van Etten.
CCAFS workshop titled "Using Climate Scenarios and Analogues for Designing Adaptation Strategies in Agriculture," 19-23 September in Kathmandu, Nepal.
Edwards climate data detectives - yale 2-2015Paul Edwards
Talk to the Yale History of Science/History of Medicine group on 9 Feb 2015. Discusses evolving knowledge infrastructures, the history of weather and climate data, and several recent controversies over climate data. "Data detectives" refers to the forensic work involved in adjusting data for changes in instrument characteristics, location, etc.
ICLR Friday Forum: Climate data in Ontario (November 13, 2015)glennmcgillivray
Preparing for the anticipated effects of climate change intuitively suggests that we need the best possible understanding and quantification of those effects. However, it can be challenging for practitioners to navigate the world of climate data. Not only can it be difficult to obtain information about our past and future climate and to discern which of the many sources should be used, but it is also a challenge to understand the limitations of the data and how it can be used appropriately and defensibly. The presentation described the current state and availability of climate data in Ontario, which is an illustrative case typical of most Canadian jurisdictions. The many sources of historic and future climate data were described, along with a discussion about the pitfalls of pursuing precision in climate data when its application is inherently uncertain.
Ryan Ness is Senior Manager of Research and Development at the Toronto and Region Conservation Authority. In this role, he is responsible for developing policy and technical solutions that allow the Authority to fulfill its water resources and ecological conservation mandate in the face of new and emerging challenges, including climate change. Ryan is a professional engineer with 16 years experience, 12 of which have been with the TRCA. He is currently pursuing a PhD in sustainability studies at the University of Waterloo.
ESRI User Conference 2014 - A Location Aware Mobile Tool for Direct and Indir...Francisco Ramos
Access to GIS data from mobile platforms continues to be a challenge and there is a wide range of fields where it is extremely useful. In this work, we combined three key aspects: climate data sensors, mobile platforms and spatial proximity operations. We published and made use of a web 2.0 network of climate data, where content is user-collected, by means of their meteorological stations, and exposed as available information for the virtual community. Moreover, we enriched this data by giving the users the opportu- nity to directly inform the system with different climate measures. In general, management of this type of information from a mobile application could result in an important decision tool, as it enables us to provide climate-related data according to a context and a geographical location. Therefore, we imple- mented a native mobile application for iPhone and iPad platforms by using ArcGIS SDK for iOS and by integrating a series of ArcGIS webmaps, which allows us to perform geospatial queries based on the user’s location, offering, at the same time, access to all the data provided by the climate data sensor network and from direct users.
Publication and long term archival of observational data in the field of environmental sciences is a challenging topic of today's eScience research. The amount of effort that goes into technical and scientific quality assurance prior to publication is considerable and might well turn out to be a barrier to data publication. Our project's goal is to lower the amount of manual effort and, at the same time, increase data quality in the process of submitting observational data for publication – in this case meteorological observational data. This goal is divided into the following subgoals:
Establish a standard procedure for the publication of observational data in the area of meteorology including quality information.
Develop a workflow system for the automatisation of the publication process.
Make the procedure usable for environmental sciences in general.
Integration of the procedure into an existing central data repository for meteorology (CERA data base at the World Data Center for Climate).
This talk is about the current state of the project from an eResearch and technical point of view.
Collaborate 2012: Environmental Accounting and ReportingAngela Miller
Presentation on the implementation of Oracle's Environmental Accounting and Reporting (EAR) module in JD Edwards. As more entities desire to self-report to The Climate Registry and the Global Reporting Initiative, tools like EAR will become imperative for their organizations to automate the data collection.
These visuals were prepared to support a string quartet performance and panel on climate change at Northwestern University in February 2106.
A well-designed graphic can help audiences to quickly understand the main message embedded within a complex set of climate data and to retain those ideas longer than they would have if they were conveyed by words alone. But the visual aids used regularly by climate scientists also have their limitations: they are most easily understood by people who are already fluent in technical illustrations; they're usually static and sometimes do not tell an obvious story; and for many, they don't elicit a strong emotional response.
Music, by contrast, is inherently narrative and is known to exert a powerful influence on human emotions. Because of this, sonification — the transformation of data into acoustic signals — may have considerable promise as a tool to enhance the communication of climate science.
Daniel Crawford and Scott St. George report on a collaboration between scientists and artists that uses music to transmit the evidence of climate change in an engaging and visceral way.
Big Data and the Climate/Environment domain (vis-a-vis the respective H2020 Societal Challenge) - Opportunities, Challenges and Requirements. As presented and discussed in the public launch of the BigDataEurope project.
Weekly Rainfall Analysis for Crop Planning Using Markov’s Chain Model for Kan...IJERA Editor
Weekly rainfall analysis of Kandhamal district during the period of 1965 to 2010 were taken for analysis purpose, the analysis is very much important for crop planning and analyzing the probability of occurrence of dry and wet periods. This will act as bench mark for crop planning as well as sustainable agricultural management of Kandhamal district which comes under the agro-climatic zone of East-coast hill region. Markov chain model has been utilized to derive the probability of dry or wet weeks and also forward and backward accumulation of rain water suitable for crop production. This analysis can be helpful to find out different cropping system including intercropping and sequence cropping suitable during that period.
Multi Objective Optimization of PMEDM Process Parameter by Topsis Methodijtsrd
In this study, MRR, SR, and HV in powder mixed electrical discharge machining PMEDM were multi criteria decision making MCDM by TOPSIS method. The process parameters used included work piece materials, electrode materials, electrode polarity, pulse on time, pulse off time, current, and titanium powder concentration. Some interaction pairs among the process parameters were also used to evaluate. The results showed that optimal process parameters, including ton = 20 µs, I= 6 A, tof = 57 µs, and 10 g l. The optimum characteristics were MRR = 38.79 mm3 min, SR = 2.71 m, and HV = 771.0 HV. Nguyen Duc Luan | Nguyen Duc Minh | Le Thi Phuong Thanh ""Multi-Objective Optimization of PMEDM Process Parameter by Topsis Method"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23169.pdf
Paper URL: https://www.ijtsrd.com/engineering/manufacturing-engineering/23169/multi-objective-optimization-of-pmedm-process-parameter-by-topsis-method/nguyen-duc-luan
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It is necessary for interactive digital signages to have attraction affordances. In this study, we develop a fluffy display and propose a method to detect human touch input. In the proposed method, we apply the Lucas-Kanade optical flow method to detect a touch, and a novel clustering method to recognize multiple touches. Based on the experimental results, we discuss ways to interact with the proposed screen.
Simulation of Tracer Injection from a Well in a Nearly Radial FlowAmro Elfeki
This is a result of Simulation of Tracer Injection from a well in a nearly radial flow using finite difference and particle tracking Radom walks.
To observe the animation of the plume progress in time, one has to download the file.
Aquifer recharge from flash floods in the arid environment: A mass balance ap...Amro Elfeki
Estimation of the infiltration/natural recharge to groundwater from rainfall is an important issue in hydrology, particularly in arid regions. This paper proposes the application of The Natural Resources Conservation Service (NRCS) mass balance model to develop infiltration (F)–rainfall (P) relationship from flash flood events. Moreover, the NRCS method is compared with the rational and the Ф-index methods to investigate the discrepancies between these methods. The methods have been applied to five gauged basins and their 19 sub-basins (representative basins with detailed measurements) in the southwestern part of Saudi Arabia with 161 storms recorded in 4 years. The F–P relationships developed in this study based on NRCS method are: F = 39% P with R2 = 0.932 for the initial abstraction factor, λ = 0.2. However, F = 77% P with R2 = 0.986 for λ = 0.01. The model at λ = 0.01 is the best to fit the data, therefore, it is recommended to use the formula at λ = 0.01. The results show that the NRCS model is appropriate for the estimation of the F–P relationships in arid regions when compared with the rational and the Ф index methods. The latter overestimates the infiltration because they do not take λ into account. There is no significant difference between F–P relationships at different time scales. This helps the prediction of infiltration rates for aquifer recharge at ungauged basins from monthly and annual rainfall data with a single formula.
Basics of Contaminant Transport in Aquifers (Lecture)Amro Elfeki
This is a basic lecture on contaminant transport in aquifers. It covers various aspects. Types of transport in aquifers. Reactive and non-reactive, governing equations of solute transport. Method of solutions and simulations.
This is a lecture on well hydraulics. The basics of flow towards the well in confined and unconfined aquifers. Well interactions. Method of images. Flow nets in case of multiple wells. Superposition theory for multiple wells.
This is a lecture on the hydraulics of gradually varied flow in open channels. It shows the profiles common in the open channels and some numerical examples using numerical integration.
Two Dimensional Flood Inundation Modelling In Urban Area Using WMS, HEC-RAS a...Amro Elfeki
This research presents a two-dimensional flood inundation modelling in urbanized areas when some features such as roads, buildings, and fences have great effect on flood propagation. Wadi Qows located in Jeddah City, Saudi Arabia was chosen as case study area because of the flood occurrence of 2009 causing lots of losses either economic or loss of life. The WMS and HEC-RAS program were used for a hydraulic simulation based on channel geometry built by incorporating urban features into DEM using GIS effectively. A resampling method of DEM 90 × 90 m become 10 × 10 m grid cell sizes was conducted to produce a higher resolution DEM suitable for urban flood inundation modelling. The results show that a higher resolution leads to increasing the average flood depth and decreasing the flood extent. Although the change of the grid cell sizes does not affect its elevation values, this approach is helpful to perform flood simulations in urban areas when high resolution DEM availability is limited. In addition, the integration of WMS, HEC-RAS and GIS are powerful tools for flood modelling in rural, mountainous and urban areas.
https://www.researchgate.net/publication/330004725_Two_Dimensional_Flood_Inundation_Modelling_in_Urban_Areas_Using_WMS_HEC-RAS_and_GIS_Case_Study_in_Jeddah_City_Saudi_Arabia_IEREK_Interdisciplinary_Series_for_Sustainable_Development
Representation of of Stochastic Processes in Stochastic Processes in Real and Spectral Domains Real and Spectral Domains and and Monte Monte-Carlo sampling
Development of Flash Flood Risk Assessment Matrix in Arid Environment: Case S...Amro Elfeki
Risk indices and risk matrix have been used among governmental agencies for assessing risks and ranking alternatives protection measures. The popularity of risk matrices can be associated with its characteristics to quick assessing risk and providing inexpensive solutions. The risk assessment is associated with flood protection as: economic, environmental, and life-safety. Economic risks are reasonably well dealt with by the well-known traditional cost-benefit analysis, insurance, and financial markets. Environmental risks are difficult to assess by traditional methods in flood project evaluation. Environmental consequences cannot be directly measured, while social risks represent the most challenge to quantify. It may be possible to estimate the number of fatalities, and cost of damaged infrastructures, while the social aspects cannot be measured. This paper is proposing a flood risk matrix technique for assessing risks in urban arid and extreme arid regions demonstrated through case-study application on the catchment of Taibah University (TU) and Islamic University (IU) in Medina, KSA. The study focused on assessing the geographical impacts of the flash flood inundated depths for different frequencies from 5 to 100 years return periods leading to identification of the flood channels, and its floodplains that may be vulnerable to different degrees of flood hazards.
Derivation of unit hydrograph of Al-Lith basin in the south west of saudi ar...Amro Elfeki
Mohammad Albishi, Jarbou Bahrawi and Amro Elfeki (2016). Derivation of the Unit Hydrograph of Allith Basin in the South West of Saudi Arabia. 7 International Conference on Water Resources and the Arid Environments (ICWRAE 7): 621-628 4-6 December 2016, Riyadh, Saudi Arabia.
Abstract:
Most studies on unit hydrograph theory is developed for temperate regions and to the best of the authors’ knowledge, there is no studies on this topic in arid regions because of the lack of runoff measurements. This paper presents the derivation of a unit hydrograph of a Allith basin and its S-curve in the south western part of Saudi Arabia to be used to predict flash flood more accurately in this region. The derivation is based on the method of stream flow data that has been collected from measured rainfall and runoff storms in the region. The study resulted in the unit hydrograph of 1 hr duration and the S-curve that is used to transfer the hydrograph to any other durations. This unit hydrograph can be used to predict flash floods in Allith basin and similar watersheds.
Empirical equations for flood analysis in arid zonesAmro Elfeki
Mohammad Albishi, Jarbou Bahrawi, and Amro Elfeki (2016). Empirical Equations for Flood Analysis in Arid Zones. Published in the book of abstracts at IWC 2016 International Water Conference 2016 on Water Resources in Arid Areas: the Way Forward.
Empirical equations for estimation of transmission lossesAmro Elfeki
Transmission losses is caused by infiltration into the streambed in ephemeral streams. The conventional methods for flood routing in wadis is impossible to achieve due to transmission losses. The Muskingum routing procedure in its basic form has two parameters, the channel time lag, Km, and the weighting parameter, x. However, both parameters do not consider transmission losses of floods in channels. O’Donnell 1985 introduced a third parameter, α, in the continuity equation to allow for the lateral movement of floodwater. Elfeki et. Al (2014) carry some modifications of the assumptions such that the negative sign of the parameter α represents transmission losses. In this research, the third-parameter α has been investigated as a tool for estimation of transmission losses using data from Yiba catchment in the Kingdom of Saudi Arabia. A spreadsheet model will be developed to deduce the equations.
Proceedings of the Second International Symposium on Flash Floods in Wadi Systems: Disaster Risk Reduction and Water Harvesting in the Arab Region (2016): 166-170
Representative elementary volume (rev) in porousAmro Elfeki
This presentation shows the concept of Representative elementary volume known in porous media. The presentation is the results of an excel spreadsheet prepared to generate hypothetical porous media in 2D. It calculates the porosity of the medium at different scales until it reaches the rev value.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Final project report on grocery store management system..pdf
Analysis of Annual Rainfall Climate Variability in Saudi Arabia by Using Spectral Density Function.
1. 7/6/2016
Dept. of Hydrology and Water Resources Management
,Faculty of Meteorology, Environment & Arid Land
Agriculture, King Abdulaziz University , P.O. Box
80208 Jeddah 21589 Saudi Arabia
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
Amro Elfeki, Nassir Al-Amri and Jarbou Bahrawi
2. Research Objectives
Typical Annual Rainfall Station Record
Methodology and Model Development
Results
Conclusions
Outlook
7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
3. Understanding the annual rainfall climate
variability in Saudi Arabia.
Extraction of the modes of variations in the
annual rainfall record.
Setting up an in-house tool (A spreadsheet
model) to perform analysis of the annual
rainfall variability and can be easily updated
once more data is available.
7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
4. 7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
-Investigated
the rainiest
part in the
Kingdom of
Saudi Arabia
(the south
western part).
-The stations
A121, B101
J102 , J113
SA104
SA110
SA111.
- Record
length (1960-
2011)= 51
years
6. 7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
- Maximum = 729 mm occurred
on 1972 (wet year)
- Minimum =16 mm occurred on
1984 (dry year).
- Average = 342 mm
-Stander deviation = 144 mm
CV = 0.42
7. Methodology: Use of the autocorrelation and the
spectral density functions to examine the
modes of variation in the annual rainfall data.
Model Development: Develop a spreadsheet
model to estimate both the autocorrelation and
the spectral density functions from the annual
data and extraction of the modes of variations.
7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
8. 7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
2
( ), ( )
( )ZZ
z
Cov Z t Z t
ZZ
(0) 1
( ) 0
( ) = (- )
ZZ
ZZ
ZZ
=
=
Properties of stationary stochastic process maybe represented in a time domain which is
represented by the autocorrelation function of the lag τ. The autocorrelation function, , is
expressed as,
( )Z t ( )Z t
2
z
( ), ( )Cov Z t Z t
is the variance of the stochastic process
are the stochastic process at two locations separated by a lag τ
is the covariance of the stochastic process at lag τ, which is given by,
( )
1
1
( ( ), ( )) ( ) - ( ) -
( )
n
j j
j
Cov Z t Z t Z Z Z Zt t
n
+ +
9. 7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
2*1 1
( ) lim ( ). ( ) lim | ( ) |zz
L L
f z f z f z fS
L L
where, L is the length of the signal in the
frequency domain,
the over bar means a sample time average, and
z(f) is Fourier transform of the process Z(t),
which is expressed as,
- 21
( ) ( )
2
i ft
z f Z t dte
and z*(f) is the conjugate of z(f) and f is the angular frequency.
Properties of the Auto-power spectrum are formulated as,
2
-
( ) 0
( )
( ) ( )
zz
zz z
zz zz
fS
f d fS
f fS S
10. 7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
- 2
-
2
-
2
-
1
( ) ( )
2
( ) ( )
(0) ( )
i f
zz zz
i f
zz zz
zz zz Z
f dS C e
f d fC S e
f d fC S
The covariance functions and spectral density functions are Fourier
transform pairs. This can be expressed in mathematical forms using
Wiener-Khinchin relationships
11. 7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
0
1
( ) ( )cos(2 )zz zzf C f dS
1
1
ˆ ( ) (0) 2 ( )cos(2 ) ( )cos(2 )
2
m
zz zz zzzz
k
t
f C C k fk t C m fm tS
,
max number of correlation lags=10%-25%(N)
/ ,
(Nyquist frequency) 1/ 2
0,1,2...,
n
n
where
m
f kf m
f t
k m
22. Multiple temporal scales were obtained with
relatively significant variance and it is therefore
difficult to identify the organized structures in
the spectra except the 26 and 2 years cycles are
common for all stations.
The significant cycles from all stations are 26,
13, 6.5, 3.5 and 2 years.
Continuous recoding is a must to enable
reliable analysis.
7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
23. One of the applications of this study is to build
time series models from the available data. The
models are based on reconstruction of the
significant ‘signals’ from the data.
Further analysis is needed to other stations in
the Kingdom.
7/6/2016
Elfeki, Al-Amri and Bahrawi (ICWRAE
2012)
