地貌单位线理论与概念性流域汇流模型的联系

THE CONNECTION BETWEEN THE THEORY OF GEOMORPHOLOGIC UNIT HYDROGRAPH AND THE CONCEPTUAL WATERSHED CONCENTRATION MODEL

通过推导地貌单位线和建立一般概念性流域地貌汇流模型，从理论上证明在一定条件下，概念性流域地貌汇流模型的响应函数等价于同级流域的地貌单位线；单元被地或河道概念性元素的响应函数等价于水质点在坡地或河道状态等待时间的概率密度函数．研究结果表明：概念性元素的响应函数可近似地表达水质点等待时间的概率密度函数；Ｈｏｒｔｏｎ的地貌律理论可应用于概念性流域汇流模型．

By deriving geomorphologic unit hydrograph (GUH) and establishing a general conceptual watershed geomorphologic concentration model (CWGCM), under certain conditions, the author confirms the equivalence between the response function of the CWGCM and the GUH of the same order basin, as well as between the response function of the conceptual element of the overland or channel and the probability density function of the waiting time of water particles at the state of overland or channel. The studying result shows that the resonpe function of conceptual element is approximately expressed as the probability density function of the waiting time of water particles and the theory functon of the waiting time of water particles and the theory of Horton's geomorphologic laws can be used in conceptual watershed concentration models.