Hsieh Cheng-Daw, Yang Wan-Fa
Institute of Environmental Engineering, National Taiwan University, Taiwan.
J Environ Manage. 2007 Dec;85(4):908-17. doi: 10.1016/j.jenvman.2006.10.022. Epub 2007 Jan 11.
The purpose of this study is to develop a model for optimal nonpoint source pollution control for the Fei-Tsui Reservoir watershed in Northern Taiwan. Several structural best management practices (BMPs) are selected to treat stormwater runoff. The complete model consists of two interacting components: an optimization model based on discrete differential dynamic programming (DDDP) and a zero-dimensional reservoir water quality model. A predefined procedure is used to locate suitable sites for construction of various selected BMPs in the watershed. In the optimization model, the objective function is to find the best combination of BMP type and placement, which minimizes the total construction and operation, maintenance, and repair (OMR) costs of the BMPs. The constraints are the water quality standards for total phosphorus (TP) and total suspended solids (TSS) concentrations in the reservoir. A zero-dimensional reservoir water quality model of the Vollenweider type is embedded in the optimization framework to simulate pollutant concentrations in Fei-Tsui Reservoir. The resulting optimal cost and benefit of water quality improvement are depicted by the model-derived trade-off curves. The modeling framework developed in the present study could be used as an efficient tool for planning a watershed-wide implementation of BMPs for mitigating stormwater pollution impact on the receiving water bodies.
本研究的目的是为台湾北部翡翠水库流域开发一个最佳非点源污染控制模型。选择了几种结构性最佳管理措施（BMPs）来处理雨水径流。完整的模型由两个相互作用的组件组成：一个基于离散微分动态规划（DDDP）的优化模型和一个零维水库水质模型。使用预定义程序在流域内确定各种选定BMPs的合适建设地点。在优化模型中，目标函数是找到BMP类型和布局的最佳组合，以使BMPs的总建设、运营、维护和修复（OMR）成本最小化。约束条件是水库中总磷（TP）和总悬浮固体（TSS）浓度的水质标准。在优化框架中嵌入了一个Vollenweider型零维水库水质模型，以模拟翡翠水库中的污染物浓度。该模型得出的权衡曲线描绘了水质改善的最优成本和效益。本研究中开发的建模框架可作为一个有效工具，用于规划在流域范围内实施BMPs，以减轻雨水污染对受纳水体的影响。
