摘要
本文按自然流域划分子流域,用“Open books”方法将子流域概化分区,根据不同区域土壤侵蚀和产沙特点,应用水文学、泥沙运动力学的基本理论建立了具有物理成因的概念性产沙数学模型,用陕北桥沟小流域实测水沙资料验证,成果具有一定的精度.本模型能模拟泥沙的时空变化过程,因而,便于客观地进行水土保持效益计算,可为小流域综合治理或规划提供决策依据.
According to the natural region method,the watershed is divided into unit areas in this paper.Using the“Open Books”method,each unit area is generalized and split up into plots.Based on soil erosion and the characteristics of sediment yield on different plots,a conceptual mathematical model with physical causes of sediment yield is established by means of basic theories of hydrolooqy and sediment transport mechanics.The model is verified with hydrological data and sediment data of Qiaogou catchment and the computing accuracy is satisfactory.This model can simulate the sediment process in time and space,therefore,benefit calculation of water and soil conservation can be performed conveniently and the results can be used as a basis in decision making in comprehensive control or planning of river basins.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1990年第6期10-16,共7页
Journal of Hohai University(Natural Sciences)
关键词
流域
产沙率
土壤
侵蚀
数学模型
soil erosion
watershed generalization
mathematical model
watershed sediment yield
rate of sediment production
rate of sediment movement
