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RISOptimal Scheduling of Water Pipe Replacement Using Genetic Algorithms
Publisher: American Society of Civil Engineers
Abstract: Like most other utilities, water authorities must manage many aging capital assets that are in varying degrees of deterioration; some of which are nearing the end of their useful lives. The annual funds available to the ...
Optimum Design and Operation of Multiple Subunit Drip Irrigation Systems
Publisher: American Society of Civil Engineers
Abstract: A nonlinear model for the optimum design and operation of drip irrigation systems on flat terrain is presented in this paper. The analysis is based on dividing a field into subunits and evaluating various shift patterns ...
Multi-Objective Trade-Offs between Cost and Reliability in the Replacement of Water Mains
Publisher: American Society of Civil Engineers
Abstract: Two of the main performance criteria of a water distribution system are that it is inexpensive to construct, operate, and maintain and that it operates in a reliable manner. These two criteria are often conflicting, thus ...
Comparison of Methods for Yield Assessment of Multiple Reservoir Systems
Publisher: American Society of Civil Engineers
Abstract: This paper compares four different methods for estimating the yield of a multiple reservoir system. These include simulation, a combined simulation-optimization model (WATHNET), a full optimization model, and a simplified ...
Water Distribution System Optimization Using Metamodels
Publisher: American Society of Civil Engineers
Abstract: Genetic algorithms (GAs) have been shown to apply well to optimizing the design and operations of water distribution systems (WDSs). The objective has usually been to minimize cost, subject to hydraulic constraints such ...
Comparison of Genetic Algorithm Parameter Setting Methods for Chlorine Injection Optimization
Publisher: American Society of Civil Engineers
Abstract: The suitability of genetic algorithms (GAs) for the optimization of water distribution systems (WDSs) has been demonstrated extensively. However, despite many years of application in many different fields, the selection ...
Optimal Operation of Complex Water Distribution Systems Using Metamodels
Publisher: American Society of Civil Engineers
Abstract: Optimization of large and hydraulically complex water distribution systems (WDSs) is computationally expensive as simulation models are required to evaluate the performance of solutions to the problem at hand. Metamodels ...
Optimal Control of Total Chlorine and Free Ammonia Levels in a Water Transmission Pipeline Using Artificial Neural Networks and Genetic Algorithms
Publisher: American Society of Civil Engineers
Abstract: In this study, a model predictive control (MPC) system is developed for the goldfield and agricultural water system (GAWS) east of Perth in Western Australia. As part of the study, four months’ water quality and hydraulic ...
Improved Ant Colony Optimization for Optimal Crop and Irrigation Water Allocation by Incorporating Domain Knowledge
Publisher: American Society of Civil Engineers
Abstract: An improved ant colony optimization (ACO) formulation for the allocation of crops and water to different irrigation areas is developed. The formulation enables dynamic decision variable option (DDVO) adjustment and makes ...