基于SWAT的内蒙古西柳沟孔兑径流模拟研究  

Using SWAT model to simulate the discharge of the Xiliugou in Inner Mongolia

作　　者：姚海芳[1] 师长兴[1] 邵文伟[1] 白建斌[1] 

机构地区：[1]中国科学院地理科学与资源研究所陆地水循环及地表过程院重点实验室,北京100101

出　　处：《干旱区资源与环境》2015年第6期139-144,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金面上项目(41371036);国家重点基础研究发展计划项目(2011CB403305)资助

摘　　要：使用SWAT模型对内蒙古十大孔兑之一的西柳沟流域进行了径流模拟,并使用SWAT-CUP结合SUFI-2算法进行了参数敏感性分析、参数率定、模型验证。研究结果表明:率定期和验证期线性拟合系数R2,Nash-Sutcliffe效率系数分别均超过了0.6和0.5,说明SWAT模型在西柳沟流域具有一定的适用性。比较模拟径流和实测径流的水文过程线,发现模拟径流在夏汛时期模拟效果较好,春汛及其他降雨较少的月份模拟效果较差,原因可能是西柳沟流域处于干旱半干旱地区,降雨时空分布不均且其流量较小,除汛期外,其它月份流量都小于1m3/s。为更好地模拟该流域的径流,SWAT模型仍有待改进。This study used the distributed hydrological model and SWAT to simulate the monthly runoff in the Xiliugou basin which is one of the ten ephemeral streams in Inner Mongolia. Model parameters were calibrated and validated with SWAT-CUP and SUFI-2 algorithm,and sensitivity and uncertain analysis were performed for improving model performance. The results indicated that the coefficient of determination（ R2） was 0. 87 and Nash-Sutcliffe coefficient（ Ens） was 0. 85 in calibration period while R2 and Ens were 0. 72 and 0. 65,respectively,in validation period. Generally,the model performance criteria were quite satisfactory. However,the SWAT was not effective to simulate the discharge during spring floods and dry periods. The reason may be that Xiliugou basin is located in an arid and semi-arid region with a relatively low runoff coefficient and quite unevenly distributed rainfall. It is proposed that the SWAT runoff generation mechanism in arid and semi-arid regions needs to be further investigated.

关 键 词：径流模拟 SWAT模型 SUFI-2 西柳沟流域 

分 类 号：P331[天文地球—水文科学] P334[水利工程—水文学及水资源]