Establishment of a Hybrid Rainfall-Runoff Model for Use in the Noah LSM  

作　　者：徐精文 张万昌 郑子彦 陈静 矫梅燕 

机构地区：[1]College of Resources and Environment,Sichuan Agricultural University [2]Institute of Atmospheric Physics,Chinese Academy of Sciences [3]Center for Earth Observation and Digital Earth,Chinese Academy of Sciences [4]National Meteorological Center,China Meteorological Administration [5]China Meteorological Administration

出　　处：《Acta meteorologica Sinica》2012年第1期85-92,共8页

基　　金：Supported by the National Basic Research and Development (973) Program of China (2010CB951404);National Nature Science Foundation of China (40971024 and 31101073);Natural Science Research Fund of the Education Department of Sichuan Province (09ZA075);Open Research Fund of the Meteorological Center for Huaihe Watershed (HRM200905);China Meteorological Administration Special Public Welfare Research Fund (GYHY200906007)

摘　　要：There is an increasing trend to incorporate the basin hydrological model into the traditional land surface model （LSM） to improve the description of hydrological processes in them. For incorporating with the Noah LSM, a new rainfall-runoff model named XXT （the first X stands for Xinanjiang, the second X stands for hybrid, and T stands for TOPMODEL） was developed and presented in this study, based on the soil moisture storage capacity distribution curve （SMSCC）, some essential modules of the Xinanjiang model, together with the simple model framework of the TOPMODEL （a topography based hydrological model）. The innovation of XXT is that the water table is incorporated into SMSCC and it connects the surface runoff production with base flow production. This improves the description of the dynamically varying saturated areas that produce runoff and also captures the physical underground water level. XXT was tested in a small-scale watershed Youshuijie （946 km2） and a large-scale watershed Yinglouxia （10009 km2） in China. The results show that XXT has better performance against the TOPMODEL and the Xinanjiang model for the two watersheds in both the calibration period and the validation period in terms of the Nash-Sutcliffe efficiency. Moreover, XXT captures the largest peak flow well for both the small： and large-scale watersheds during the validation period, while the TOPMODEL produces significant overestimates or underestimates, so does the Xinanjiang model.There is an increasing trend to incorporate the basin hydrological model into the traditional land surface model （LSM） to improve the description of hydrological processes in them. For incorporating with the Noah LSM, a new rainfall-runoff model named XXT （the first X stands for Xinanjiang, the second X stands for hybrid, and T stands for TOPMODEL） was developed and presented in this study, based on the soil moisture storage capacity distribution curve （SMSCC）, some essential modules of the Xinanjiang model, together with the simple model framework of the TOPMODEL （a topography based hydrological model）. The innovation of XXT is that the water table is incorporated into SMSCC and it connects the surface runoff production with base flow production. This improves the description of the dynamically varying saturated areas that produce runoff and also captures the physical underground water level. XXT was tested in a small-scale watershed Youshuijie （946 km2） and a large-scale watershed Yinglouxia （10009 km2） in China. The results show that XXT has better performance against the TOPMODEL and the Xinanjiang model for the two watersheds in both the calibration period and the validation period in terms of the Nash-Sutcliffe efficiency. Moreover, XXT captures the largest peak flow well for both the small： and large-scale watersheds during the validation period, while the TOPMODEL produces significant overestimates or underestimates, so does the Xinanjiang model.

关 键 词：XXT TOPMODEL soil moisture storage capacity distribution curve Xinanjiang rainfallrunoff model 

分 类 号：P333.1[天文地球—水文科学]