Download or read book Modeling Economic Effects of Stochastic Water Supply and Demand on Minimum Stream Flow Requirements written by David Brian Willis and published by . This book was released on 1993 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stochastic Water Demand Modelling written by Mirjam Blokker and published by IWA Publishing. This book was released on 2011-09-19 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water quality processes in the drinking water distribution network are strongly influenced by the flow velocity and residence time of the water in the network. In order to understand how the water quality changes in the drinking water distribution network, a good understanding of hydraulics is required. Specifically in the periphery of the network, where customers are connected, the hydraulics can change rapidly. During the night time the water is almost stagnant and the residence time increases. In the morning, when everybody gets up and flushes the toilet and takes a shower, high flow velocities can occur. During the remainder of the day flow velocities are low. The stochastic endues model SIMDEUM was developed to simulate water use on a small time scale (1 s) and small spatial scale (per fixture). SIMDEUM enables a good model of flow velocities, residence times and the connected water quality processes in the water distribution network. Stochastic Water Demand Modelling: Hydraulics in Water Distribution Networks describes the requirements of hydraulics in water quality modelling and provides insight into the development of detailed residential and non-residential water demand models. The book illustrates the use of detailed demand models in water quality models with respect to the variation in residence times and the relation with particle accumulation and resuspension. The models are compared to measurements in several real drinking water distribution networks.
Download or read book Economic Modeling of Water written by Glyn Wittwer and published by Springer Science & Business Media. This book was released on 2012-03-06 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book details the innovative TERM (The Enormous Regional Model) approach to regional and national economic modeling, and explains the conversion from a comparative-static to a dynamic model. It moves on to an adaptation of TERM to water policy, including the additional theoretical and database requirements of the dynamic TERM-H2O model. In particular, it examines the contrasting economic impacts of water buyback policy and recurring droughts in the Murray-Darling Basin. South-east Queensland, where climate uncertainty has been borne out by record-breaking drought and the worst floods in living memory, provides a chapter-length case study. The exploration of the policy background and implications of TERM’s dynamic modeling will provide food for thought in policy making circles worldwide, where there is a pressing need for solutions to similarly intractable problems in water management.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smart Markets for Water Resources written by John F. Raffensperger and published by Springer. This book was released on 2017-04-20 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why is trade in wholesale water so rare, when markets can actively trade bread, tractors, and electricity? This book shows that water markets fail because of high transaction costs, resulting in inefficient allocations and unpredictable environmental effects. To overcome these obstacles, this book proposes a trading mechanism called a smart market. A smart market is an auction cleared with optimization. A smart market can reduce the transaction costs of water trading, while improving the environmental outcomes. The authors show why a smart market for water is needed, how it would work, and how to implement it. The smart market described here uses a hydrology simulation of the water resource, user bids via the internet, and mathematical optimization, to maximize the economic value of water while meeting all environmental constraints. The book provides the background to understand the smart market for water, and the detail to help the reader start working on its application. The book explores topics such as: Why water should be more expensive near sensitive environmental locations, Ways to set initial allocations of water rights, The role of regulatory oversight, The prerequisites of a water market, and How to counter objections to water markets. The culmination of a decade of investigation, this book combines explanation, examples, and detail to inform policymakers, large water users, environmental organizations, researchers, and a thirsty public.
Download or read book A Full scale Simulation Study of Stochastic Water Demands on Distribution System Transport written by Xueyao Yang and published by . This book was released on 2010 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Typical network modeling in distribution system analysis assumes the water demands are known and constant over 1 hour. However, as utilities move towards "all-pipe" network models, continuing to ignore the stochastic water demands may not adequately account for the impacts of demand variability on the underlying transport and water quality characteristics. The objective of this research is to evaluate the potential impacts of different levels of temporal aggregation of water demands on the underlying hydraulic, transport, and water quality simulations for both a small network and a large "all-pipe" network system. A non-homogeneous Poisson Rectangular Pulse model was used to generate stochastic water demands aggregated at 1-min, 10-min, and 1-hr time steps, and linked with EPANET to perform hydraulic and water quality simulations. The impacts of the three temporal aggregations of water demands were evaluated with respect to: 1) hydraulics by evaluating pressure and flow rate variability; 2) transport and water quality characteristics using "conservative chemical intrusion" events and evaluating transport times and cumulative mass. Additional studies were performed to interpret the chemical analysis within a risk analysis framework, and investigated the impact of temporal aggregation with different injection durations. For a small skeletonized network, results showed for main trunk lines, the demand variability had little influence on the flow rate, chemical concentration, and risk assessment. However, as dead end nodes or pipes were analyzed, there was an increase in the flow rate variability with decreasing temporal aggregation that impacted the chemical concentration time series and risk assessment by altering the travel paths and times. For the large "all-pipe" network model, the results illustrated a greater frequency in flow reversals as well as meaningful differences in the initial arrival time and half-mass arrival time of chemical with decreasing temporal aggregation scales. Upon analyzing the Monte Carlo ensemble of results, the majority of nodes that resulted in meaningful initial chemical arrival time differences tended to be located at the edges of the network. With respect to the half-mass arrival time, a spatial analysis indicated there were a number of nodes within a blending region that had meaningful differences within a majority of the Monte Carlo realizations. Finally, a comparison of the stochastic water demand simulations to the original deterministic simulation indicated that the intra-hour variability resulting from the stochastic demands was more important than the variability resulting from the temporal aggregation scale. The results associated with a risk assessment also showed meaningful differences in the time until 1% and 50% of the population at a node infected by a toxic chemical between the shorter temporal aggregation scales and the 1-hr case. The impacts of injection duration illustrated the injection duration had little impact on the initial chemical arrival time. However, decreasing the injection duration had greater impacts on the differences of half-mass chemical arrival time and cumulative mass between the 10-min and 1-hr aggregation cases. These results indicate that there are portions of a distribution system where the typical network modeling assumptions may not be appropriate to adequately represent localized transport.
Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by and published by . This book was released on 1969 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Economic Modeling for Water Policy Evaluation written by Robert McDowell Thrall and published by North-Holland. This book was released on 1976 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by Water Resources Scientific Information Center and published by . This book was released on 1974 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Model Choice written by W. Robert James and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book From Headwaters to the Ocean written by Makoto Taniguchi and published by CRC Press. This book was released on 2008-09-11 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vulnerability of water resources due to climate change and human activities is globally increasing. The phenomenon of hydrological change is complicated because of the combinations and interactions between natural climate fluctuation, global warming and human activities including changes in land utilization. The impact areas of hydrological cha
Download or read book Water Systems towards New Future Challenges written by Helena M. Ramos and published by MDPI. This book was released on 2021-03-09 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises components associated with smart water which aims at the exploitation and building of more sustainable and technological water networks towards the water–energy nexus and system efficiency. The implementation of modeling frameworks for measuring the performance based on a set of relevant indicators and data applications and model interfaces provides better support for decisions towards greater sustainability and more flexible and safer solutions. The hydraulic, management, and structural models represent the most effective and viable way to predict the behavior of the water networks under a wide range of conditions of demand and system failures. The knowledge of reliable parameters is crucial to develop approach models and, therefore, positive decisions in real time to be implemented in smart water systems. On the other hand, the models of operation in real-time optimization allow us to extend decisions to smart water systems in order to improve the efficiency of the water network and ensure more reliable and flexible operations, maximizing cost, environmental, and social savings associated with losses or failures. The data obtained in real time instantly update the network model towards digital water models, showing the characteristic parameters of pumps, valves, pressures, and flows, as well as hours of operation towards the lowest operating costs, in order to meet the requirement objectives for an efficient system.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1981 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Resources Research Catalog written by United States. Office of Water Research and Technology and published by . This book was released on 1969 with total page 1536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with vol. 9, only new and continuing but modified projects are listed. Vols. 8- should be kept as a record of continuing but unchanged projects.
Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by Daniel P. Loucks and published by . This book was released on 1973 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
