Of Binary Evolution Model-based Hydrological Model

With the evolution of human, the impact of man's activities on basin hydrological processes is increasing. Conventional hydrological models can not solve this problem any more. Only through the use of models that have a physical basis and allow for spatial variations within a catchment can these problems be tackled. Based on this point, this thesis puts forward BMBC (Basin Moisture Balancing and Cycling Model).The characters of rain, transpiration, underlayer and runoff flow, which determine the basin hydrological process, are affected by nature processes and man's activities. In order to make the basin hydrological processes clearly, the impact of nature processes and man's activities must be studied. The essence of So-called Dual Water Evolvement Mode is to study the impact of nature processes and man's activities respectively. Therefore, the ultimate target of basin hydrological model is to develop models based on Dual Water Evolvement Mode. So this is BMBC. It is an all-inclusive model and the impact of nature processes and man's activities will be considered comprehensively.In regard to BMBC, this thesis emphasizes particularly on when basin underlayer has been changed by man's activities, how basin output of rain evolves. In order to solve this problem, this thesis puts forward a hypothesis: to any type of basin underlayer, its hydrological response is constant and independent of its area and position. From this hypothesis, all problems come down to find the hydrological response of every type of basin underlayer. Based on this hypothesis, this thesis puts forward three methods: experimentation, statistic method and hydrological model, and studies the statistic method detailedly.Firstly, SCS model, based on the same theory, is used to simulate the basin of DaGe in ChaoBaiHe, and the physical meaning of parameters of SCS is analyzed.Secondly, the statistic method is used tentatively to put forward a scheme to build BMBC model, and the model is employed to simulate the basin of DaGe and XiaPu in ChaoBaiHe, and the result is satisfying.