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Water Resource Management Commons™

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2014

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Articles 181 - 210 of 769

Full-Text Articles in Water Resource Management

Newly Automated System For Integrated Assessment Of The Conditions Of Underwater Gas Pipelines, Oleg Ilinich, Vadim Pryahin Aug 2014

Newly Automated System For Integrated Assessment Of The Conditions Of Underwater Gas Pipelines, Oleg Ilinich, Vadim Pryahin

International Conference on Hydroinformatics

An underwater gas pipeline is the portion of the pipeline that crosses a river beneath its bottom. Underwater gas pipelines are subject to increasing dangers as time goes by. An accident at an underwater gas pipeline can lead to technological and environmental disaster on the scale of an entire region. Therefore, timely troubleshooting of all underwater gas pipelines in order to prevent any potential accidents will remain a pressing task for the industry. The most important aspect of resolving this challenge is the quality of the automated system in question. Now the industry doesn't have any automated system that fully …

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Monitoring Snow Cover Area In Semiarid Regions Using Terrestrial Photography, Rafael Pimentel, María José Pérez-Palazón, Javier Herrero, María José Polo Aug 2014

Monitoring Snow Cover Area In Semiarid Regions Using Terrestrial Photography, Rafael Pimentel, María José Pérez-Palazón, Javier Herrero, María José Polo

International Conference on Hydroinformatics

The heterogeneous distribution of snow in mountain regions often constitutes a great problem for an adequate modeling of snow dynamics. Remote sensing is usually used for the detection of snow distribution, but the fixed spatiotemporal resolution of these sources greatly reduces their efficiency, especially when the significant scale of the process under study is smaller than the sensor resolution. This is the case of the snow in semiarid areas, where rapid snow melting on sunny and warm days may substantially change the snow cover within just a few days, or where small snow patches (O~1 m) usually persist during many …

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Differential Evolution Algorithm (De) To Estimate The Coefficients Of Uniformity Of Water Distribution In Sprinkler Irrigation, Ramin Mansouri, Hasan Torabi Aug 2014

Differential Evolution Algorithm (De) To Estimate The Coefficients Of Uniformity Of Water Distribution In Sprinkler Irrigation, Ramin Mansouri, Hasan Torabi

International Conference on Hydroinformatics

Iran, has caused most of the water used and as much as possible to avoid losses. One of the important parameters in agriculture is water distribution uniformity coefficient (CU) in sprinkler irrigation. CU amount of water sprinkler operating depends on different pressure heads (P), riser height (RH), distance between sprinklers on lateral pipes (Sl) and the distance between lateral pipes (Sm). The best combination of the above parameters for maximum CU, is still unknown for applicators. In this research, CU quantities of zb model sprinkler (made in Iran) were measured at Hashemabad cotton research station of Gorgan under 3 different …

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Numerical Modeling Of Flow In The Vertical Drop With Inverse Apron, Ramin Mansouri, Alinaghi Ziaei Aug 2014

Numerical Modeling Of Flow In The Vertical Drop With Inverse Apron, Ramin Mansouri, Alinaghi Ziaei

International Conference on Hydroinformatics

Drops are hydraulic structures that are commonly used in irrigation and waste water collection networks. A vertical drop balances the elevation difference between the channel slope and ground slope. Earlier investigations on this structure have mainly focused on experimental studies of the hydraulic characteristics. In this paper, the hydraulic characteristics of vertical drops with inverse apron have been studied numerically with used of Fluent software to solve the finite volume method. The volume of fluid (volume of fluid) was used for modeling the free surface. Flow characteristics such as downstream depth, pool depth and energy loss were calculated and compared …

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A Web Gis Based Simulation Tool For Coastal Urban Flood Prediction, T. Iype Eldho, A.T. Kulkarni, J. Mohanty, E.P. Rao, B.K. Mohan Aug 2014

A Web Gis Based Simulation Tool For Coastal Urban Flood Prediction, T. Iype Eldho, A.T. Kulkarni, J. Mohanty, E.P. Rao, B.K. Mohan

International Conference on Hydroinformatics

Flooding in urban areas due to heavy rainfall coupled with high tides is a major concern affecting development of coastal cities all over the world. There is a spectrum of models such as 2D distributed flood models to simplified storage cell models using analytical expressions. All such models demand a high level of skill to handle geospatial data making it difficult for decision makers. Thus development of web GIS based hydrological application becomes essential. Traditionally, most web GIS based applications have used conceptual model because of low data requirements and parameter calibrations. In this paper web GIS based integrated flood …

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Merging Quantitative And Qualitative Analyses For Flood Risk Assessment At Heritage Sites, The Case Of Ayutthaya, Thailand, Zoran Vojinović, Daria Golub, Sutat Weesakul, Weeraya Keerakamolchai, Sianee Hirunsalee, Vorawit Meesuk, Arlex Sanchez-Torres, Sisira Kumara Aug 2014

Merging Quantitative And Qualitative Analyses For Flood Risk Assessment At Heritage Sites, The Case Of Ayutthaya, Thailand, Zoran Vojinović, Daria Golub, Sutat Weesakul, Weeraya Keerakamolchai, Sianee Hirunsalee, Vorawit Meesuk, Arlex Sanchez-Torres, Sisira Kumara

International Conference on Hydroinformatics

The present paper presents a flood risk assessment approach for urban areas with mixed land-use including cultural sites. Destruction of heritage properties through disasters creates a serious loss for the national and local communities, not only because of the cultural importance of heritage assets but also for their socio-economic value. At the same time, studies have shown that protecting heritage promotes resilience since heritage contributes to social cohesion, sustainable development and psychological well-being (Jigyasu et. al [3]). Although disaster risk management activities have been developed intensively, a very few methodologies are developed specifically for preservation of heritage sites. Economic as …

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Wrap Your Model!, Hauke Sonnenberg, Michael Rustler, Victor Philippon, Nicolas Caradot, Andreas Matzinger Aug 2014

Wrap Your Model!, Hauke Sonnenberg, Michael Rustler, Victor Philippon, Nicolas Caradot, Andreas Matzinger

International Conference on Hydroinformatics

Introduction Environmental models are often provided in the form of software solutions, with different levels of complexity. The simplest form is an executable file reading the model setup and boundary conditions from input files, doing the calculations and generating output files with model results. Preparing input files and reading output files requires to know and respect model specifics such as file formats and calling conventions. This "user-unfriendliness" may discourage the usage of models in this simplest form. However, these models may offer great opportunities since they are often freely available and contain the pure model "core" being fast in execution. …

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Hydrodata.Info: A Web Service For Hydrological Time Series Visualization, Jiri Kadlec Aug 2014

Hydrodata.Info: A Web Service For Hydrological Time Series Visualization, Jiri Kadlec

International Conference on Hydroinformatics

Fast, attractive and efficient visualization in the form of time series charts is important for communicating the results of hydrologic research to the public. While there are many popular tools and application programming interfaces (API's) for creating time-series charts on the web (Google charts, HighCharts and others), none of these tools are specially tailored for hydrologic time-series observations and forecasts. This presentation introduces the concept of a free web service for generating hydrologic time-series charts from any combination of data sources available in the Consortium of Universities for Advancement of Hydrologic Science (CUAHSI)'s Hydrologic information System. This catalog of distributed …

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Trade-Offs Model Of Multi-Objective Reservoir Operation With Uncertainties, Meili Feng, Tao Sun, Guido Zolezzi Aug 2014

Trade-Offs Model Of Multi-Objective Reservoir Operation With Uncertainties, Meili Feng, Tao Sun, Guido Zolezzi

International Conference on Hydroinformatics

As the increase of water resources management and exploitation goals, it is gaining increasing weights for reservoir operation to seek optimal options for the balance between multiple and contradictory water resources use objectives. This study develops a trade-offs model to quantify the economic benefits of reservoir operation rules on the downstream water supply yield. Uncertainties of different water use benefits are considered by using a Monte Carlo method in the trade-offs model. The case study is analyzed to evaluate its performance in terms of water use benefits of agriculture, hydropower, flood control and environmental water requirements in the Yellow River, …

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Hydrogeological Modelling Of Contaminated Area In Tegal, Indonesia, Sapari Dwi Hadian, Syarif Ali, Rifky Meisa, Nursiyam Barkah Aug 2014

Hydrogeological Modelling Of Contaminated Area In Tegal, Indonesia, Sapari Dwi Hadian, Syarif Ali, Rifky Meisa, Nursiyam Barkah

International Conference on Hydroinformatics

Small and Medium Enterprises metal smelting in Tegal has been existed since more than 50 years ago. This metal smelting process produces heavy metal waste such as zinc, iron, aluminum and copper which exceed the limit and contaminate the water. These hazardous and toxic wastes are disposed directly into the environment without adequate treatment to remove harmful compounds, thus alleged to have a high level of pollution to groundwater and surface water. The aim of the study is to obtain geological and hydrogeological condition of the study area, so that would be obtained the groundwater impurity pattern in the study …

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Genetic Programming For Cellular Automata Urban Inundation Modelling, Mike J. Gibson, Edward C. Keedwell, Dragan A. Savić Aug 2014

Genetic Programming For Cellular Automata Urban Inundation Modelling, Mike J. Gibson, Edward C. Keedwell, Dragan A. Savić

International Conference on Hydroinformatics

Recent advances in Cellular Automata (CA) represent a new, computationally efficient method of simulating flooding in urban areas. A number of recent publications in this field have shown that CAs can be much more computationally efficient than methods than using standard shallow water equations (Saint Venant/Navier-Stokes equations). CAs operate using local state-transition rules that determine the progression of the flow from one cell in the grid to another cell, in many publications the Manning’s Formula is used as a simplified local state transition rule. Through the distributed interactions of the CA, computationally simplified urban flooding can be processed, although these …

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Model Validation Using Crowd-Sourced Data From A Large Pluvial Flood, Vedrana Kutija, Robert Bertsch, Vassilis Glenis, David Alderson, Geoff Parkin, Claire Walsh, John Robinson, Chris Kilsby Aug 2014

Model Validation Using Crowd-Sourced Data From A Large Pluvial Flood, Vedrana Kutija, Robert Bertsch, Vassilis Glenis, David Alderson, Geoff Parkin, Claire Walsh, John Robinson, Chris Kilsby

International Conference on Hydroinformatics

On 28 June 2012, Newcastle upon Tyne, UK, was hit by a large convective storm delivering 45 mm of rain in less than two hours. Although not large on a world scale, the event had a big local impact. Widespread areas of the city were inundated and traffic was blocked in and around the city for about 6 hours. The following morning there was very small amount of visible evidence that the event happened. To gather data about the event through crowd sourcing Newcastle University organised and publicised a web page inviting public to upload their flood photographs, pin them …

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Drihm - An Infrastructure To Advance Hydro-Meteorological Research, Bert Jagers, Antonio Parodi, Michael Schiffers, Nils Otto Vor Dem Gentschen Felde, Christian Straube, Andrea Clematis, Daniele D'Agostino, Quillon Harpham Aug 2014

Drihm - An Infrastructure To Advance Hydro-Meteorological Research, Bert Jagers, Antonio Parodi, Michael Schiffers, Nils Otto Vor Dem Gentschen Felde, Christian Straube, Andrea Clematis, Daniele D'Agostino, Quillon Harpham

International Conference on Hydroinformatics

One of the main challenges in hydro-meteorological research (HMR) is predicting the impact of weather and climate changes on the environment, society and economy, including local severe hazards such as floods and landslides. At the heart of this challenge lies the ability to have easy access to hydro-meteorological data and models, and facilitate the collaboration across discipline boundaries. Within the DRIHM project (Distributed Research Infrastructure for Hydro-Meteorology, www.drihm.eu, EC funded FP7 project 2011-2015) we develop a prototype e-Science environment to facilitate this collaboration and provide end-to-end HMR services (models, datasets, and post-processing tools) at the European level, with the ability …

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An Optimization And Decision Support Tool For Long-Term Strategies In The Transformation Of Urban Water Infrastructure, Theo G. Schmitt, Silja Worreschk, Inka Kaufmann Alves, Frank Herold, Clemens Thielen Aug 2014

An Optimization And Decision Support Tool For Long-Term Strategies In The Transformation Of Urban Water Infrastructure, Theo G. Schmitt, Silja Worreschk, Inka Kaufmann Alves, Frank Herold, Clemens Thielen

International Conference on Hydroinformatics

Predicted climatic, demographic and socio-economic developments cause major adaptions of urban water infrastructures. The central water supply and wastewater systems in Europe do not meet the increased requirements of resource efficiency and sustainability anymore. Especially in rural areas predicted demographic change and the particular differentiated settlement structure affect the functionality of present water infrastructures. These new challenges require extensive and flexible adaptions or even a long-term and dynamic system change of urban infrastructures. These long-term transformations of infrastructure systems require the design of innovative strategies. In the project presented, environmental engineers together with city planners, mathematicians and computer scientists develop …

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Development Of Climate Change Information Database And Its Use In Civic Consciousness Enlightenment, Motohiro Honma, Yuri Michihiro, Yasushi Suzuki, Yoshinobu Sato Aug 2014

Development Of Climate Change Information Database And Its Use In Civic Consciousness Enlightenment, Motohiro Honma, Yuri Michihiro, Yasushi Suzuki, Yoshinobu Sato

International Conference on Hydroinformatics

GCM outputs such as CMIP3 are available via network access to PCMDI web site. Meteorological researchers are familiar with the usage of the GCM data, but the most of researchers other than meteorology such as agriculture, civil engineering, etc., and general people are not familiar with the GCM. There are some difficulties to use GCM; 1) to download the enormous quantity of data, 2) to understand the GCM methodology, parameters and grids. In order to provide a quick access way to GCM, Climate Change Information Database has been developed. The purpose of the database is to bridge the users and …

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Study On Optimization Of The Integrated Operation Of Dams Using Ensemble Prediction, Satoru Oishi, Hiroko Masuda Aug 2014

Study On Optimization Of The Integrated Operation Of Dams Using Ensemble Prediction, Satoru Oishi, Hiroko Masuda

International Conference on Hydroinformatics

Flood control is one of the most important issues of reservoir operation. Rivers in island countries like Japan, Philippines and Indonesia that have smaller reservoirs than continental countries needs short term reservoir operation for flood control. In Japan, typhoons give dominant amount of water to reservoirs. Pre-release of water which makes effective use of the capacity of a reservoir requires the rainfall amount forecast (hyetograph). Therefore, weather forecast of typhoons is indispensable for flood control. Masuda and Oishi (2013) developed the reservoir control operation model using stochastic dynamic programming with one week ensemble weather forecast. One week ensemble forecast consists …

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An Application Of Services Based Modelling Paradigm To The Hydrologic Domain Using Ewater Source, Matthew Paul Stenson, Dave Penton, Ben Leighton, Nicholas J. Car, Qifeng Bai, Ramneek Singh, Jean-Michel Perraud, Robert Bridgart Aug 2014

An Application Of Services Based Modelling Paradigm To The Hydrologic Domain Using Ewater Source, Matthew Paul Stenson, Dave Penton, Ben Leighton, Nicholas J. Car, Qifeng Bai, Ramneek Singh, Jean-Michel Perraud, Robert Bridgart

International Conference on Hydroinformatics

The traditional paradigm for the deployment of hydrological models involves the capturing and testing of model concepts and numerical consistency for robustness and accuracy, which is then distributed as binary files with or without source code. The model software is then populated with data and parameters and run locally within the modeller’s organisation, often on their own desktop. This modelling workflow is used by many organisations; however, there are several limitations and potential issues. Once the software is outside the developer’s organisation they rely on the modeller to apply updates and bug fixes in a timely manner, and to correctly …

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Comparison Of Various Phased Approaches For The Constrained Minimum-Cost Design Of Water Distribution Networks, Enrico Creaco, Marco Franchini, Tom Walski Aug 2014

Comparison Of Various Phased Approaches For The Constrained Minimum-Cost Design Of Water Distribution Networks, Enrico Creaco, Marco Franchini, Tom Walski

International Conference on Hydroinformatics

This work is aimed at analyzing and comparing three different phased approaches for constrained minimum-cost design of water distribution networks: the single-step design with demand feedback, the multi-step design without demand feedback and the multi-step design with demand feedback. The difference between the single-step design and the multi-step design lies in the fact that whereas the former entails optimizing a single construction step at a time, i.e. the current construction phase, the latter is based on the phasing of construction and then is aimed at optimizing the current construction phase and all the subsequent phases, included inside a certain temporal …

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Uncertainty Assessment Of The Integrated Hydrological Ensemble Prediction System Designed For The Nattai River Catchment, Agnes Sakal, James E. Ball, Douglas Graham, Alan Seed Aug 2014

Uncertainty Assessment Of The Integrated Hydrological Ensemble Prediction System Designed For The Nattai River Catchment, Agnes Sakal, James E. Ball, Douglas Graham, Alan Seed

International Conference on Hydroinformatics

An integrated hydrological ensemble prediction system (IHEPS) is providing a probabilistic assessment of future stream flow predicitons replacing the traditional forecasting method of a single deterministic flow forecast. The ensemble forecasting system includes multi model approaches where the hydrological forecasts model is driven by weather prediction model outputs to generate an ensemble stream flow forecast predictions. The performance of the IHEP systems intent to increase the credibility of the stream flow forecast predictions at the point of interest. However, quality of the stream flow forecast predictions are influenced by uncertainties originated from various sources in the forecasting chain. This paper …

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Assessment Of The Sensitivity Of Gompitz, Marius Møller Rokstad, Yves Le Gat, Rita Maria Ugarelli Aug 2014

Assessment Of The Sensitivity Of Gompitz, Marius Møller Rokstad, Yves Le Gat, Rita Maria Ugarelli

International Conference on Hydroinformatics

Decision support for sewer rehabilitation programs is dependent on reliable information about the asset conditions. Inference about the condition development can be made by combining condition observations with deterioration forecasting models. GompitZ is a Non-Homogenous Markov Chain model, which enables waste water utilities to predict the sewer deterioration at a network segment level, based on closed-circuit TV (CCTV) inspection and normalized condition grading. The predictions can be used to assess investment needs for the sewer systems. Successful calibration and prediction is however dependent on the validity of the model assumptions, sufficient amounts of CCTV observations, and that the condition grading …

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Flow Analysis And Leak Detection With The Cfpd Method In The Paris Drinking Water Distribution System, Peter Van Thienen, Frank Montiel Aug 2014

Flow Analysis And Leak Detection With The Cfpd Method In The Paris Drinking Water Distribution System, Peter Van Thienen, Frank Montiel

International Conference on Hydroinformatics

With significant drinking water loss rates >10% during distribution at many drinking water utilities worldwide, the detection of new leaks, especially small and slowly growing leaks, remains an important challenge for the water sector. Time series of flow rates into isolated or completely metered distribution areas (e.g. District Metered Areas) contain signals of all existing and new leaks in that area, and also of all other processes taking place, e.g. changes in demand, operations, etc. Therefore, in principle these data can provide valuable information about new leaks, unregistered changes in valve status, etc. However, distinguishing one from the others is …

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Alternative Strategies For Optimal Water Quality Sensor Placement In Drinking Water Distribution Networks, Peter Van Thienen Aug 2014

Alternative Strategies For Optimal Water Quality Sensor Placement In Drinking Water Distribution Networks, Peter Van Thienen

International Conference on Hydroinformatics

The most commonly applied strategies for optimal water quality sensor placement in drinking water distribution systems are aimed at contamination early warning systems. These strategies aim to minimize the number of people affected in case of a deliberate contamination of drinking water in the distribution system, and provide a valuable tool. A number of factors which are usually not taken into account, including the response strategy to the identification of a contamination event, the fallibility of sensors and changes in network configuration (valve manipulation) and operation, may affect the results of these strategies. Since the quickness and effectiveness of a …

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Evaluation Of Decision Making Methods For Integrated Water Resource Management Under Uncertainty, Thomas Peter Roach, Zoran Kapelan, Michelle Ledbetter, Ben Gouldby, Steven Wade, Ralph Ledbetter Aug 2014

Evaluation Of Decision Making Methods For Integrated Water Resource Management Under Uncertainty, Thomas Peter Roach, Zoran Kapelan, Michelle Ledbetter, Ben Gouldby, Steven Wade, Ralph Ledbetter

International Conference on Hydroinformatics

Water companies and utilities in the UK are required to produce Water Resource Management Plans (WRMPs) every five years that outline their future strategies for maintaining a secure water supply to meet anticipated demand levels. Regulatory frameworks differ around the world but in most countries similar plans are developed under the auspices of Integrated Water Resources Management (IWRM) programmes. The plans justify new demand management and water supply infrastructure needed and validate management decisions. One of the greatest problems now facing decision makers in the water industry are the increasing uncertainties in the variables used in estimating the supply and …

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From Smart Meters To Smart Decisions: Web-Based Support For The Water Efficient Household, Christos Makropoulos, Panagiotis Kossieris, Stefanos Kozanis, Eli Katsiri, Lydia Vamvakeridou-Lyroudia Aug 2014

From Smart Meters To Smart Decisions: Web-Based Support For The Water Efficient Household, Christos Makropoulos, Panagiotis Kossieris, Stefanos Kozanis, Eli Katsiri, Lydia Vamvakeridou-Lyroudia

International Conference on Hydroinformatics

Smart water metering technologies for residential buildings offer, in principle, great opportunities for sustainable urban water management. However, much of this potential is as yet unrealized. Despite that several ICT solutions have already been deployed aiming at optimum operations on the water utilities side (e.g. real time control for water networks, dynamic pump scheduling etc.), little work has been done to date on the consumer side. This paper presents a web-based platform targeting primarily the household end user. The platform enables consumers to monitor, on a real-time basis, the water demand of their household, providing feedback not only on the …

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Sustainable Urban Water Management: A Simulation Optimization Approach, Saeed Nazari, S. Jamshid Mousavi, Kourosh Behzadian, Zoran Kapelan Aug 2014

Sustainable Urban Water Management: A Simulation Optimization Approach, Saeed Nazari, S. Jamshid Mousavi, Kourosh Behzadian, Zoran Kapelan

International Conference on Hydroinformatics

Sustainable water supply for an urban water system (UWS) is a challenge especially when the system is subject to both climate change and increasing water demand. This paper presents a simulation-optimization approach for determining an optimal strategy for long term operation of UWSs. The simulation module is the conceptual WaterMet2 model which can quantify and evaluate the values of some pre-defined performance indicators through simulating the UWS operation. The optimization module is the genetic algorithm (GA) minimizing water abstraction from groundwater wells and total costs while maximizing the system reliability. The decision variables are the amounts of water allocated to …

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Effective Data Management Enables Intelligent Utility Management, Gary L.S. Wong Aug 2014

Effective Data Management Enables Intelligent Utility Management, Gary L.S. Wong

International Conference on Hydroinformatics

Instrumentation and automation plays a vital role to managing the water industry. These systems generate vast amounts of data that must be effectively managed in order to enable intelligent decision making. Time series data management software, commonly known as data historians are used for collecting and managing real-time (time series) information. More advanced software solutions provide a data infrastructure or utility wide Operations Data Management System (ODMS) that stores, manages, calculates, displays, shares, and integrates data from multiple disparate automation and business systems that are used daily in water utilities. These ODMS solutions are proven and have the ability to …

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Induction Of Governing Differential Equations From Hydrologic Time Series Data Using Genetic Programming, Jayashree Chadalawada, Vladan Babovic Aug 2014

Induction Of Governing Differential Equations From Hydrologic Time Series Data Using Genetic Programming, Jayashree Chadalawada, Vladan Babovic

International Conference on Hydroinformatics

Induction of Governing Differential Equations from Hydrologic Time Series Data using Genetic Programming Jayashree Chadalawada and Vladan Babovic This contribution describes an evolutionary method for identifying causal model from the observed time-series data. In the present case, we use a system of ordinary differential equations (ODEs) as the causal model. Usefulness of the approach is demonstrated on real-world time series of hydrologic processes and the unknown function of governing factors are determined. To explore the evolutionary search space more effectively, the right hand sides of ODEs are inferred by genetic programming (GP). The importance of different fitness criteria, as well …

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Decision-Making Frameworks For Using Sensor Data And Evolutionary Algorithms To Flush A Contaminated Water Distribution System, M. Ehsan Shafiee, Emily Zechman Berglund Aug 2014

Decision-Making Frameworks For Using Sensor Data And Evolutionary Algorithms To Flush A Contaminated Water Distribution System, M. Ehsan Shafiee, Emily Zechman Berglund

International Conference on Hydroinformatics

In the event that a contaminant enters a water distribution system, opening hydrants to flush contaminated water can protect consumers from becoming exposed. Strategies for operating hydrants can be developed to specify the selection of hydrants and the timing of operations to maximize the amount of contaminant that is removed from the system. As an event unfolds, however, sensor data may be the only information that is available to indicate the location and timing of the contaminant source, and ultimately, hydrant strategies must be selected in a highly uncertain environment. The decision-making framework for making real-time decisions to select hydrant …

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Numerical Simulation Of 3d Flow In Right-Angled Confluences With Bed Elevation Discordance In The Main River, Dejana Đorđević Aug 2014

Numerical Simulation Of 3d Flow In Right-Angled Confluences With Bed Elevation Discordance In The Main River, Dejana Đorđević

International Conference on Hydroinformatics

Two major morphological phenomena in alluvial river confluences are the development of an avalanche face or faces at the entrance of one or both converging channels to the confluence, due to deposition of coarser sediments, and deepening of the scour hole in the post-confluence channel. The development of an avalanche face creates the difference in bed elevations between incoming and outgoing channels. Laboratory experiments in movable bed models of confluences showed, and bathimetric surveys in field confluences confirmed, that avalanche faces develop in both converging channels only in alluvial river confluences with large junction angles (α ≥ 45o). The effect …

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Monitoring Spatiotemporal Total Organic Carbon Concentrations In Lake Mead With Integrated Data Fusion And Mining (Idfm) Technique, Sanaz Imen, Ni-Bin Chang, Y. Jeffrey Yang Aug 2014

Monitoring Spatiotemporal Total Organic Carbon Concentrations In Lake Mead With Integrated Data Fusion And Mining (Idfm) Technique, Sanaz Imen, Ni-Bin Chang, Y. Jeffrey Yang

International Conference on Hydroinformatics

Forest fires, soil erosion, and land use changes in Lake Mead watershed nearby Las Vegas wash are considered as sources of water quality impairment in the Lake Mead. These conditions result in higher concentration of Total Organic Carbon (TOC). TOC in contact with Chlorine which is often used for disinfection purposes of drinking water supply causes the formation of trihalomethanes (THMs). THM is one of the toxic carcinogens controlled by EPA’s Disinfection By-Product Rule. As a result of threat posed to drinking water of 25 million people downstream, recreation area, and wildlife habitat of Lake Mead, it is necessary to …

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