Improvement of Optimal Multi-Purpose Reservoir Operations by Atom Search Optimization Technique: A Case Study of Nong Han Kumphawapi ReservoirPages 100-108
Abstract:
The research objective is to develop a decision support system for finding the optimal rule curve of a reservoir using an optimization technique model, in conjunction with the Hedging rule (HR) and Standard operating policy (SOP) criteria, and to evaluate the performance of the resulting rule curve. The monthly inflow data of the reservoir from 1,000 synthetic historical data sets, presented in the form of frequency, event timing, average water quantity, and maximum water quantity, both in water shortage and overflow situations, are used. These data are then used to create a set of solutions for three different situations: low water quantity, high water quantity, and average water quantity situation. The study area is the Nong Han Kumphawapi Reservoir in Udon Thani Province, which is a multipurpose reservoir with the objectives of water allocation for domestic water supply, ecosystem conservation (red water lily sea), agriculture, and industry. The research results found that the rule curve of the reservoir developed using optimization techniques with Genetic Algorithm (GA) and Atom Search Optimization (ASO) methods shows similar URC and LRC curve characteristics. From the evaluation of the performance of the rule curve obtained from the model, in alternative 1, for a high-water year (80 percentile), the rule curve considering HR discharge using GA technique is the most efficient, with only 302.644 million cubic meters of excess water discharged. In alternative 2, for an average water year, the rule curve considering HR discharge using both GA and ASO techniques is the most efficient, with the GA technique avoiding water shortages and resulting in 180.965 million cubic meters of excess water. In alternative 3, for a water shortage year (20 percentile), the rule curve considering HR discharge using GA and ASO techniques is the most efficient, by reducing water shortages in the case of a low water year to 4 million cubic meters per year.
Keywords: Water Infrastructures, Multi-Purpose Reservoir Operations, Reservoir Rule Curves, Optimization Technique, Non-Construction Reservoir Management
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