基于SWAT模型的喀斯特地区流域径流模拟研究--以赤水河流域上游为例

摘要

为探索SWAT模型在喀斯特地区径流模拟中的实用性，以赤水河流域为例，在GIS、RS等技术的支持下，应用SWAT模型利用2000年至2010年的逐日气象数据与逐月径流量数据对流域上游地区月径流进行了模拟.结果表明：率定期的决定系数R2和Nash效率系数Ens分别为0.80与0.75，验证期的决定系数R2和Nash效率系数Ens分别为0.81与0.77，模型的实用性较好，SWAT模型适用于喀斯特地区河流径流的模拟.模型结果可为流域上游水资源生态补偿、流域水资源评价、水资源管理及流域水土保持提供依据.%To explore practicality of runoff simulation in Karst areas based on SWAT model,taking Chishui River as an example,with the support of GIS and RS technology,and applying SWAT model to analyze the daily meteorological data and the monthly runoff data of 2000 to 2010 ,the monthly runoff of this river region was simu-lated in this paper. The results showed that:Rate determination coefficient R2 and regular Ens Nash efficiency co-efficient of 0. 80 and 0. 75 respectively. Validation period determination coefficient R2 and Nash efficiency coeffi-cient of Ens were 0. 82 and 0. 78 respectively,indicating that the practicability of the model is good,and SWAT model is suitable for Chishui River basin runoff simulation. The model results provide a basis for eco-compensa-tion,assessment,management of water resource and the conservation of soil and water of this river region.