摘要
AnnAGNPS模型是一个由美国农业部农业研究局和自然资源保护局联合开发的连续模拟来自流域的地表径流、沉积物、污染负荷的分布式参数模型。本文以大沽河流域为例,建立了AnnAGNPS模型数据库,包括气候、地形、土壤、土地利用等相关参数的确定过程,充分使用了GIS、RS、农田调查等技术和方法,重点分析了降雨特征、模拟单元的划分、农田操作措施、土壤相关参数的转换、径流曲线值等因子,为该模型在中国的合理使用奠定了基础。
AnnAGNPS is a tool for comparing the effects of implementing various conservation alternatives within the watershed. Cropping systems, fertilizer application rates, water and dissolved nutrients from point sources, sediment with attached chemical.s from gullies, soluble nutrient contributions from feedlots, and the effect of terraced fields can be modeled. In this paper, AnnAGNPS model database are constructed including weather, topography, soil and land use in Dagu watershed. The field rotation sequence, typical cropland field operations, and fertilizing type were analyzed. The average runoff curve numbers of land use types were identified. The study has laid foundation for application of AnnAGNPS model in China.
出处
《三峡环境与生态》
2009年第3期20-23,42,共5页
Environment and Ecology in the Three Gorges
基金
国家(908)项目
项目编号(908-02-02-03)
