SWAT模型灵敏性分析模块在云州水库流域的应用  

Application of Sensitivity Analysis Module of SWAT Model in Yunzhou Reservoir Basin

作　　者：张丽娟[1] 秦富仓[1] 岳永杰[1] 张艳杰[1] 苏江[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《水土保持通报》2010年第3期122-127,共6页Bulletin of Soil and Water Conservation

基　　金：国家"十一五"科技计划课题"华北土石山区中尺度流域防护林体系优化配置"(2006BAD03A0201)

摘　　要：SWAT模型是基于水文过程的,具有很强物理机制的流域分布式水文模型。介绍了AVSWAT2005灵敏性分析模块,并在华北土石山区云州水库流域得到较好的应用与验证。通过灵敏性分析,辨析出影响该流域产流模拟结果精度的主要参数因子。SCS径流曲线系数(CN2)、土壤可利用水量(SOL_AWC)、土壤饱和导水率(SOL_K)的影响是显著的,灵敏性等级高;平均坡度(SLOPE)、浅层地下水径流系数(GWQMN)有一定影响,灵敏性等级中;依据上述结论调整参数值,采用连续10a的实测月流量数据对模型进行了校准和验证。结果表明,模型对月流量模拟的相对误差在模型校准期和验证期均小于15%,Nash-Suttcliffe系数Ens高于0.7,SWAT模型对云州水库流域产流的模拟结果良好。因此,灵敏性分析模块的应用极大地提高了模型在华北土石山区的可用性,具有一定的推广意义。The soil and water assessment tool（SWAT） is a physically-based continuous event hydrologic model.This paper mainly introduces the sensitivity analysis model of the AVSWAT2005 and its verification in Yunzhou Reservoir basin.Based on the sensitivity analysis,the main parameters affecting the simulated values in the watershed are determined.Results show that the CN2,SOL_AWC,and SOL_K parameters have the most significant influence on the simulated values of runoff from Yunzhou watershed,the sensitivity being in a high level;and the SLOPE and GWQMN have the more significant influence on runoff,the sensitivity being in a general level.The parameters are adjusted based on the above analyzed results and the model is verified using over 10 years data of monthly runoff.Satisfied simulation results are obtained with the relative error under 15% and Nash-suttcliffes coefficient （Ens） more than 0.7.The simulation result of SWAT model for Yunzhou Reservoir basin is good.Therefore,the application of sensitivity analysis module of SWAT model in the soil-gravel area of North China may improve the accuracy of simulation dramatically.

关 键 词：SWAT模型 灵敏性分析 参数因子 云州水库流域 

分 类 号：S157.1[农业科学—土壤学]