基于AnnAGNPS模型的桃江流域农业区水文模拟研究

水是污染物迁移的载体,流域水文过程的模拟为土壤侵蚀及非点源污染的模拟提供了必要的前提。以江西桃江流域农业区为研究对象,利用农业非点源模型(AnnAGNPS模型)定量模拟和评价了研究区水文过程,基于3S技术对地形、气象、土壤、土地利用和农业管理等资料进行收集和参数化,并用数字滤波法切割基流后的月观测径流对模型进行校准和验证。结果表明,在校准期和验证期,采用的3个评价指标均满足径流模拟的精度要求,表明AnnAGNPS模型具有良好的模拟效果,能较好地模拟桃江流域农业区的水文过程。

Study on Hydrologic Simulation of Agricultural Region in Taojiang Basin Based on AnnAGNPS Model

Water is the carrier of transport of pollutants. Hydrologic process simulation is the basis of modeling soil erosion and non-point source pollution. Taking agricultural region of Taojiang basin in Jiangxi Province for a study object, annualized agricultural non-point source pollution model (AnnAGNPS) is applied to simulate and evaluate hydrologic process quantitatively. Based on 3S technologies, the data including topography, meteorology, soil, land-use and agricultural management practices are collected and parameterized. The model are adjusted and checked by using measured monthly runoff cutting base flow with digital filtering method. The results show that three evaluation indexes meet the accuracy requirement of runoff simulation in calibration and verification period; AnnAGNPS model has good simulated effect, which can simulate hydrological process of agricultural region in Taojiang basin.