摘要
根据概念性流域地貌汇流模型的一般理论，以概念性元素“扩散模拟河段”模拟各级单元河道的汇流作用，建立了以洪水波的波速和扩散系数为参数的扩散模拟型流域地貌汇流模型。推导了三级流域的瞬时单位线，并对其性质作了分析。讨论了矩法和内罚函数法两种求解模型参数的方法。用南雁流域的雨洪资料对模型进行了检验。结果表明：模型结构合理，内罚函数法求参比较有效，模型拟合精度较高。
According to a general theory of conceptual watershed geomorphy concentration model, using the conceptual element of diffusion analogy reach to simulate the concentration action of each ordering unit channel, this paper developes a diffusion analogy type watershed geomorphy concentration model in which the parameters are flood wave velocity and diffusion coefficient. The instantaneous unit hydrograph (iuh) of three order basin is derived, and the nature of the iuh is analysied. The author discusses the methods of moment and interior penalty functon (ipf) which are used to obtain the parameters of the proposed model. The model is tested in Nanyan catchment and the result shows that the model has a rational structure and an accuracy when the ipf method is used.
出处
《地理学报》
EI
CSSCI
CSCD
北大核心
1997年第4期316-323,共8页
Acta Geographica Sinica
关键词
流域地貌
汇流模型
扩散模拟
diffusion, analogy, watershed concentration, geomorphy, interior penalty functon method
