Now showing items 1541-1560 of 3360

    • Relationship between Water Withdrawals and Freshwater Ecosystem Water Scarcity Quantified at Multiple Scales for a Great Lakes Watershed 

      Stanley T. Mubako; Benjamin L. Ruddell; Alex S. Mayer (American Society of Civil Engineers, 2013)
      Even in relatively water-rich regions, withdrawal and consumption of water has the potential to create instream freshwater ecosystem water scarcity, especially at seasonal and local scales. Water resource policy must balance ...
    • Evaluation of New Control Structures for Regulating the Great Lakes System: Multiscenario, Multireservoir Optimization Approach 

      Saman Razavi; Masoud Asadzadeh; Bryan Tolson; David Fay; Syed Moin; Jacob Bruxer; Yin Fan (American Society of Civil Engineers, 2014)
      Water levels in the Great Lakes–St. Lawrence system located in northeastern North America are critically important to the Canadian and U.S. economies. Water managers are concerned that this system, which is currently managed ...
    • Hydrologically Sensitive Areas, Land Use Controls, and Protection of Healthy Watersheds 

      Z. Qiu; C. Hall; D. Drewes; G. Messinger; T. Prato; K. Hale; D. Van Abs (American Society of Civil Engineers, 2014)
      Land use changes driven by urban development impose immediate threats to watershed health and sustainability of water resources. Municipalities can implement various land use controls to direct future urban development ...
    • Battle of the Water Networks II 

      Angela Marchi; Elad Salomons; Avi Ostfeld; Zoran Kapelan; Angus R. Simpson; Aaron C. Zecchin; Holger R. Maier; Zheng Yi Wu; Samir M. Elsayed; Yuan Song; Tom Walski; Christopher Stokes; Wenyan Wu; Graeme C. Dandy; Stefano Alvisi; Enrico Creaco; Marco Franchini; Juan Saldarriaga; Diego Páez; David Hernández; Jessica Bohórquez; Russell Bent; Carleton Coffrin; David Judi; Tim McPherson; Pascal van Hentenryck; José Pedro Matos; António Jorge Monteiro; Natércia Matias; Do Guen Yoo; Ho Min Lee; Joong Hoon Kim; Pedro L. Iglesias-Rey; Francisco J. Martínez-Solano; Daniel Mora-Meliá; José V. Ribelles-Aguilar; Michele Guidolin; Guangtao Fu; Patrick Reed; Qi Wang; Haixing Liu; Kent McClymont; Matthew Johns; Edward Keedwell; Venu Kandiah; Micah Nathanael Jasper; Kristen Drake; Ehsan Shafiee; Mehdy Amirkhanzadeh Barandouzi; Andrew David Berglund; Downey Brill; Gnanamanikam Mahinthakumar; Ranji Ranjithan; Emily Michelle Zechman; Mark S. Morley; Carla Tricarico; Giovanni de Marinis; Bryan A. Tolson; Ayman Khedr; Masoud Asadzadeh (American Society of Civil Engineers, 2014)
      The Battle of the Water Networks II (BWN-II) is the latest of a series of competitions related to the design and operation of water distribution systems (WDSs) undertaken within the Water Distribution Systems Analysis ...
    • Knowledge-Based Approach for Reservoir System Optimization 

      Xiang Li; Jiahua Wei; Xudong Fu; Tiejian Li; Guangqian Wang (American Society of Civil Engineers, 2014)
      This paper addresses a knowledge-based approach for reservoir system optimization. The approach takes a more detailed consideration of each turbine in a hydropower plant than the traditional constant output coefficient ...
    • Bayesian Approach for Real-Time Probabilistic Contamination Source Identification 

      Xueyao Yang; Dominic L. Boccelli (American Society of Civil Engineers, 2014)
      Drinking water distribution system models have been increasingly utilized in the development and implementation of contaminant warning systems. This study proposes a Bayesian approach for probabilistic contamination source ...
    • Nonparametric Benchmarking of Japanese Water Utilities: Institutional and Environmental Factors Affecting Efficiency 

      Rui Cunha Marques; Sanford Berg; Shinji Yane (American Society of Civil Engineers, 2014)
      Although the Japanese water sector is economically and socially important, few empirical studies are available to help analysts and policy-makers understand the performance patterns in the industry. This study applies data ...
    • Coupled Binary Linear Programming–Differential Evolution Algorithm Approach for Water Distribution System Optimization 

      Feifei Zheng; Angus R. Simpson; Aaron C. Zecchin (American Society of Civil Engineers, 2014)
      A coupled binary linear programming–differential evolution (BLP-DE) approach is proposed in this paper to optimize the design of water distribution systems (WDS). Three stages are involved in the proposed BLP-DE optimization ...
    • Modeling Equitable Distribution of Water: Dynamic Inversion-Based Controller Approach 

      Usha Manohar; M. S. Mohan Kumar (American Society of Civil Engineers, 2014)
      It is a well-known fact that most of the developing countries have intermittent water supply and the quantity of water supplied from the source is also not distributed equitably among the consumers. Aged pipelines, pump ...
    • Mechanism for Fair Allocation of Surface Water under the Riparian Doctrine 

      Xuetao Hu; J. Wayland Eheart (American Society of Civil Engineers, 2014)
      The common-law Riparian Doctrine, the legal basis for water allocation in the eastern United States, restricts qualified users along a shared waterway to reasonable withdrawals. Recent water shortages and droughts have ...
    • Mixing at Cross Joints with Different Pipe Sizes in Water Distribution Systems 

      T. C. Yu; Y. Shao; C. Shen (American Society of Civil Engineers, 2014)
      Accurate prediction of mixing at cross junctions is important in water quality models because most of the intersecting pipes use cross junctions in water distribution systems. To describe the characteristics of complex ...
    • Composite Risk Assessment for the Sacramento–San Joaquin Delta Levee System 

      William H. McAnally; Christopher M. Wallen; Steven C. Sanborn; Eugene C. Maak (American Society of Civil Engineers, 2014)
      The objectives of this project were to analyze available Sacramento–San Joaquin Delta, California, levee risk information in a Composite Risk Management matrix and examine the results for management decision support. U.S. ...
    • Optimal Pumping Scheduling for Complex Irrigation Water Distribution Systems 

      Juan Reca; Alfonso García-Manzano; Juan Martínez (American Society of Civil Engineers, 2014)
      The establishment of an optimal pumping schedule is a cost-free, efficient measure that is easily adopted to reduce energy costs. This paper proposes an optimal pumping scheduling model for complex irrigation water ...
    • Classic Optimization Techniques Applied to Stormwater and Nonpoint Source Pollution Management at the Watershed Scale 

      James F. Limbrunner; Richard M. Vogel; Steven C. Chapra; Paul H. Kirshen (American Society of Civil Engineers, 2013)
      Linear and dynamic programming formulations are introduced for optimizing the placement of distributed best management practices (BMPs) at the watershed scale. The results of linear programming optimization of infiltration-based ...
    • Incorporating Reanalysis-Based Short-Term Forecasts from a Regional Climate Model in an Irrigation Scheduling Optimization Problem 

      Mohamad I. Hejazi; Ximing Cai; Xing Yuan; Xin-Zhong Liang; Praveen Kumar (American Society of Civil Engineers, 2014)
      A coupled simulation-optimization with reanalysis-based short-term weather forecasts from a regional climate model (RCM) is proposed to optimize an irrigation scheduling problem. Using different physical configurations of ...
    • Water Network Sectorization Based on Graph Theory and Energy Performance Indices 

      Armando Di Nardo; Michele Di Natale; Giovanni F. Santonastaso; Velitchko G. Tzatchkov; Victor H. Alcocer-Yamanaka (American Society of Civil Engineers, 2014)
      This paper proposes a new methodology for the optimal design of water network sectorization, which is an essential technique for improving the management and security of multiple-source water supply systems. In particular, ...
    • Integrating Decision Analysis with Fuzzy Programming: Application in Urban Water Distribution System Operation 

      T. Y. Xu; X. S. Qin (American Society of Civil Engineers, 2014)
      Water-distribution operation is an essential part of an urban water-supply system to deliver high-quality water to consumers. Management of such an operation may involve deliberations of operation cost, system capacity, ...
    • Optimization of Conventional Rule Curves Coupled with Hedging Rules for Reservoir Operation 

      Mehrdad Taghian; Dan Rosbjerg; Ali Haghighi; Henrik Madsen (American Society of Civil Engineers, 2014)
      As a common approach to reservoir operating policies, water levels at the end of each time interval should be kept at or above the rule curve. In this study, the policy is captured using rationing of the target yield to ...
    • Subdivision Infrastructure Affecting Storm Water Runoff and Residential Property Values 

      Jessica Boatwright; Kurt Stephenson; Kevin Boyle; Sara Nienow (American Society of Civil Engineers, 2014)
      In many areas of the country, urban storm water runoff is a growing water quality problem. To improve storm water programs, regulatory officials are now placing greater emphasis on reducing the volume of runoff. Called ...
    • Identifying Residential Water End Uses Underpinning Peak Day and Peak Hour Demand 

      Cara D. Beal; Rodney A. Stewart (American Society of Civil Engineers, 2014)
      Accurate and up-to-date peak demand data are essential to ensure that future mains water supply networks reflect current usage patterns and are designed efficiently from an engineering, environmental, and economic perspective. ...