摘要
非点源污染的前期过程，是在流域面上污染物质或是营养元素随着降雨径流的产生而产生。利用实验室大型土槽试验，研究ANSWERS-2000模型的水文子模型对于人工降雨事件的模拟精度，探索ANSWERS-2000在理想坡面上的适用情况，并且尽可能准确地给出其水文模型的部分参数的取值。经过计算发现该水文子模型模拟理想坡面的误差较小，但是存在系统偏大的情况；整个计算单元的Manning糙率取0．03～0．07。存在的问题有参数土表面结皮层厚度只能定性无法准确的定量描述；降雨装置测流装置对于径流模拟产生的影响较大。
Before the non-point pollution occurs, there are some pollutant and nutrition leached and, together with the runoff, rushed to downstream. In an indoor precipitation experiment,ANSWERS-2000 model （hydrology sub-model） were used to find out if it can model the rainfall-runoff process accurately and if it＇s suitable for Chinese watershed, and giving out some suitable value of parameter in sub-model. It＇s found out that given hydrology sub-model can model runoff process with letter errors, the value is systematicly bigger and the value of Manning roughness coefficient is located in 0.03-0.07. There are also some problems that crust thickness has no suitable value and the rainfall and runoff equipment has created some error in runoff modeling.
出处
《水土保持研究》
CSCD
北大核心
2008年第1期103-106,共4页
Research of Soil and Water Conservation
基金
国家自然科学基金重点项目(50239030)
