生态与农村环境学报2018，Vol.34Issue(3)：207-215,9.DOI:10.11934/j.issn.1673-4831.2018.03.003
岔口小流域AnnAGNPS模型参数敏感性分析
Sensitivity Analysis of AnnAGNPS Model Parameters in Chakou Watershed
摘要
Abstract
Chakou Watershed was located in the typical loess hilly-gully region,and was selected as study area. Ten pa-rameters of AnnAGNPS model were selected for sensitivity analysis,and Morris classification method was used to analyze the sensitivity of the parameters to the simulation results of the model. Based on the results of parameter sensitivity analy-sis,the model calculation results were verified.The results show that:The number of runoff curves has great positive influ-ence on model output;Channel Manning coefficient and field water-holding capacity have negative influence on model out-put. The most sensitive parameters affecting the surface runoff output are the number of runoff curves and the field water-holding capacity. The most sensitive parameters affecting the sediment and nutrient output are the number of runoff curves, soil erodibility factor, tillage management factor, topographic factor, and soil and water conservation factor. The spatial distribution of nitrogen and phosphorus pollutants is not consistent,the regional differences are obvious,and the soil nitro-gen and phosphorus pools are the main sources of their losses.The model can better reflect the surface runoff process(R2=0.99,Ens=0.99). The results of simulations on sediment, nitrogen and phosphorus are widely inaccurate, but to some extent,it can reflect the trend of soil and water loss and nitrogen and phosphorus pollution,and has certain reference value to the control and management of soil erosion and non-point source pollution.关键词
AnnAGNPS/参数敏感性/摩尔斯/岔口小流域Key words
AnnAGNPS model/parameter sensitivity/Morris/Chakou Watershed分类
资源环境引用本文复制引用
娄永才,郭青霞..岔口小流域AnnAGNPS模型参数敏感性分析[J].生态与农村环境学报,2018,34(3):207-215,9.基金项目
国家自然科学基金(41071345) （41071345）
