Optimization and simulation of reservoir operation with sediment evacuation: a case study of the Tarbela Dam, Pakistan
Optimization and simulation of reservoir operation with sediment evacuation: a case study of the Tarbela Dam, Pakistan
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DOI：
10.1002/hyp.7173
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发表时间：
2009-02-28
影响因子：
3.2
通讯作者：
Tingsanchali, Tawatchai
中科院分区：
文献类型：
--
作者：
Khan, Noor M.;Tingsanchali, Tawatchai
世界上许多水库都是根据规则曲线开发的，而不考虑沉积沉积物的排出。目前的水库模拟和优化模型由于没有考虑泥沙淤积造成的水库蓄水量损失，缺乏可持续性的概念。本研究建立了一个新的水库优化-输沙模拟（ROSSE）模型。该模型利用基于遗传算法的优化能力，将排沙模块嵌入到仿真模块中。沉积物排出模块采用清华大学冲刷方程实现。应用ROSSE模型对Tarbela水库规律曲线进行了优化。巴基斯坦最大的水库，长期存在沉积问题。拟合本研究，优化规则曲线，使放水净经济效益最大化。释放的水可用于灌溉、发电。沉积物疏散。并用于防洪。相对权重用于综合这些相互冲突的用水所带来的好处。对比了9组规则曲线，即针对各种策略方案开发的8种场景的现有规则曲线和建议规则曲线。优化后的规则曲线与现有规则曲线相比，个体净经济效益均有9% ~ 248%的提高。通过增加输沙量，模拟期间灌溉供应短缺减少了38%，水库可持续性提高了28%。研究认为，通过调整运行政策和规则曲线，可以提高水库的可持续性，实现净经济效益的最大化。所建立的方法和模型可用于其他有沉积问题的水库规律曲线的优化。版权所有(C) 2008约翰威利父子有限公司
Many reservoirs around the world are being operated based on rule curves developed without considering the evacuation of deposited sediment. Current reservoir simulation and optimization models fall short of incorporating the concept of sustainability because the reservoir storage losses due to sedimentation are not considered. This Study develops a new model called Reservoir Optimization-Simulation with Sediment Evacuation (ROSSE) model. The model utilizes genetic algorithm based optimization capabilities and embeds the sediment evacuation module into the simulation module. The sediment evacuation Module is implemented using the Tsinghua university flushing equation. The ROSSE model is applied to optimize the rule curves of Tarbela Reservoir. the largest reservoir in Pakistan with chronic sedimentation problems. fit the present Study, rule curves are optimized for maximization of net economic benefits from water released. The water released call be used for irrigation, power production. sediment evacuation. and for flood control purposes. Relative weights are used to combine the benefits from these conflicting water uses. Nine sets of rule Curves are compared, namely existing rule curves and proposed rule curves for eight scenarios developed for various policy options. These optimized rule curves show all increase of net individual economic benefits ranging, from 9 to 248% over the existing, rule curves. The shortage of irrigation Supply during the simulation period is reduced by 38% and reservoir sustainability is enhanced by 28% through increased sediment evacuation. The study concludes that by modifying the operating policy and rule curves, it is possible to enhance the reservoir's sustainability and maximize the net economic benefits. The developed methodology and the model call be used for optimization of rule curves of other reservoirs with sedimentation problems. Copyright (C) 2008 John Wiley & Sons, Ltd.