Sediment yield computation of the sandy and gritty area based on the digital watershed model

作     者：LIU Jiahong WANG Guangqian LI Tiejian XUE Hai HE Li 

作者机构：State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2006年第49卷第6期

页      面：752-763页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.50221903) 

主　　题：the digital watershed model, the sandy and gritty area, sediment yield. 

摘      要：The Yellow River is well known as a sediment-laden river, which is the main reason that it cannot be controlled as easily as other rivers. Many researchers, such as Qian Ning et al., have found that the sediment load of the Yellow River comes mainly from the sandy and gritty area of the Loess Plateau. Therefore, it is very important to simulate the sediment yield in this area. This paper proposes a method to compute the sediment production in the sandy and gritty area based on the digital watershed model. The suggested model is calibrated and validated in the Chabagou basin, which is a small catchment in the study area. Finally, the model simulates the sediment yield of the sandy and gritty area in 1967, 1978, 1983, 1994 and 1997, which represents a high water and high sediment year, a mean water and mean sediment year, a high water and low sediment year, a low water and high sediment year, and a low water and low sediment year separately. The simulation results, including the runoff depth and erosion modulus, can well explain the low water and high sediment phenomena in the Yellow River basin. The total amount of the sediment production and its distribution generated by the model is very useful for water and soil conservation in the sandy and gritty area of the Loess Plateau.