基于SWAT模型的黄河流域(河南段)径流模拟研究

Runoff Simulation Study of the Yellow River Basin(Henan Section)Based on the SWAT Model

【目的】水土资源不平衡严重制约着河南省经济社会高质量发展,开展径流模拟是进行水土资源合理调控的前提,对于流域水土资源高效管理具有重要意义。【方法】基于GIS构建黄河流域(河南段)的SWAT模型,建立流域模型的空间数据库和属性数据库,采用SUFI-2算法对影响模拟径流结果的重要参数进行分析,选择花园口站和艾山站作为出口进行校准,模拟黄河流域(河南段)的径流过程。【结果】结果表明,参数中SFTMP、SOL_AWC对的径流模拟结果的影响最为显著;花园口站和艾山站的R~2和NSE均大于0.8,SWAT模型在黄河流域(河南段)具有较好的适用性。【结论】研究结果可为黄河流域(河南段)水资源量模拟提供参考,建立的模型为花园口站和艾山站未来径流变化模拟提供了借鉴。

[Purposes]The imbalance of water and soil resources seriously restricts the high-quality de⁃velopment of economy and society in Henan Province.Runoff simulation is the premise of reasonable regulation of water and soil resources,which is of great significance for the efficient management of water and soil resources in the basin.[Methods]The SWAT model of the Yellow River basin(Henan section)was constructed based on GIS,the spatial database and attribute database of the basin model were estab⁃lished,SUFI-2 algorithm was used to analyze the important parameters affecting the simulated runoff re⁃sults,and Huayuankou station and Aishan station were selected as the exits for calibration to simulate the runoff process of the Yellow River basin(Henan section).[Findings]The results show that among the parameters,SFTMP and SOL_AWC have the most significant influence on the runoff simulation results.R2 and NSE of Huayuankou and Aishan stations are greater than 0.8,and SWAT model has good applica⁃bility in the Yellow River basin(Henan section).[Conclusions]The results have some reference for the simulation of water resources in the Yellow River basin(Henan section),and the model provides a refer⁃ence for the simulation of future runoff change at Huayuankou station and Aishan station.