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首页> 外文期刊>Water Resources Management >Vegetation Buffer Strips Design Using an Optimization Approach for Non-Point Source Pollutant Control of an Agricultural Watershed
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Vegetation Buffer Strips Design Using an Optimization Approach for Non-Point Source Pollutant Control of an Agricultural Watershed

机译：基于优化方法的农业流域面源污染控制植被缓冲带设计

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摘要

Management of agriculture-induced water quality problems requires an integrated approach involving selection of the most suitable and economical Best Management Practices (BMP). Vegetation Buffer Strips (VBS), one of the commonly used off-field structural BMPs, when designed and placed correctly, can significantly improve the water quality. However, VBS takes up agricultural land used for crop production and the implementation/maintenance costs are of concern. Currently, the standards for design of VBS (location and width) are normally set on field study basis, and they do not involve science-based approach to guarantee their efficiency under regional variations, geological and economical conditions. The present study proposes a new approach which integrates computational modeling of watershed processes, fluvial processes and modern heuristic optimization techniques to design a cost effective VBSs in a watershed. The watershed model AnnAGNPS (Annual A Gricultural /Von-Point Source Pollution Model) and channel network model CCHE1D (Center for Computational Hydroscience and Engineering One(7) Dimensional Model) are linked together to simulate the sediment/pollutant transport processes. Based on the computational results, a multi-objective function is set up, which aims to minimize soil losses, nutrient concentrations as well as total costs associated with installation and maintenance of VBS, while the production profits from agriculture production are being maximized. The solution procedure involves the use of iterative Tabu Search (TS) algorithm to flip VBS design parameters (switching from one alternative to another). The search for the optimal solution follows an iterative procedure. An illustrative case study of USDA's Goodwin Creek experimental watershed located in Northern Mississippi is used to demonstrate the capabilities of the proposed approach. The results show that the optimized design of VBS using an integrated approach at the watershed level can provide efficient and cost-effective conservation of the environmental quality by taking into account productivity and profitability.
机译：管理农业引起的水质问题需要采用综合方法，其中包括选择最合适，最经济的最佳管理实践（BMP）。正确设计和放置植被缓冲带（VBS）是常用的场外结构BMP之一，可以显着改善水质。但是，VBS占用了用于农作物生产的农业用地，因此实施/维护成本值得关注。当前，VBS的设计标准（位置和宽度）通常是在现场研究的基础上制定的，并且不涉及基于科学的方法来保证其在区域变化，地质和经济条件下的效率。本研究提出了一种新方法，该方法将流域过程，河流过程和现代启发式优化技术的计算模型相集成，以设计流域中具有成本效益的VBS。流域模型AnnAGNPS（年度A种植业/污染点源污染模型）和渠道网络模型CCHE1D（计算水科学与工程中心一维模型（7）维模型）链接在一起，以模拟沉积物/污染物的迁移过程。根据计算结果，建立了一个多目标函数，旨在最大程度地减少土壤损失，养分浓度以及与安装和维护VBS相关的总成本，同时使农业生产的生产利润最大化。解决过程涉及使用迭代禁忌搜索（TS）算法来翻转VBS设计参数（从一种替代方法切换到另一种替代方法）。寻找最佳解决方案遵循一个迭代过程。美国农业部位于密西西比州北部的古德温溪实验分水岭的说明性案例研究用于证明该方法的功能。结果表明，在流域一级使用集成方法对VBS进行的优化设计可以通过考虑生产率和收益率来提供有效且具有成本效益的环境质量保护。

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