Planning and effect evaluation for vegetative filter strips in water source area based on model simulation

2012 International Symposium on Geomatics for Integrated Water Resource Management Pub Date : 2012-11-12 DOI:10.1109/GIWRM.2012.6349582

Yinqun Yang, Yanru Wang, Huai'en Li, Fangshe Yang

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Abstract

Vegetative filter strip (VFS) is a new kind of ecological engineering measure for the control of nonpoint source pollution. For investigating the application of mathematical models in the planning and designing of vegetative filter strip, the vegetative filter strip hydrology and sediment transport model (VFSMOD) was used to analyze the effect of VFS' width and slop on the sediment load removal rate in Heihe water source area, thus determining the appropriate planning scheme of vegetative filter strip. Subsequently, the linear relationships between the unit load of TP, TN and unit sediment were used to estimate the watershed nonpoint source pollution load reduction efficiency of VFS. The results showed that the grass filter strips with width in the range of 3 ~ 5 m was advisable and should not be used on slopes with gradient of higher than 60°; when VFS was constructed on parts of sensitive riparian in the water source area, the incoming load of sediment, TP and TN could be reduced by 22.14, 12.66 and 14.60%, respectively. VFS could play an important role in the water quality protection of Heihe water source area.

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基于模型模拟的水源地植物过滤带规划与效果评价

植物过滤带是一种控制非点源污染的新型生态工程措施。为探讨数学模型在植被过滤带规划设计中的应用，采用植被过滤带水文输沙模型(VFSMOD)，分析了植被过滤带宽度和坡度对黑河水源区输沙率的影响，从而确定了适宜的植被过滤带规划方案。随后，利用全磷、全氮单位负荷与单位泥沙的线性关系，估算了VFS的流域非点源污染负荷削减效率。结果表明，宽度为3 ~ 5 m的草滤条为宜，坡度大于60°的坡面不宜使用;在水源区部分敏感河岸上修建VFS，泥沙、总磷和总氮的来水负荷分别降低22.14%、12.66%和14.60%。VFS可在黑河水源地水质保护中发挥重要作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 International Symposium on Geomatics for Integrated Water Resource Management

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