【摘要】 提出了一个基于数字高程模型(DEM)的分布式流域水文模型,主要用来模拟湿润地区的蓄满产流机制。通过建立土壤蓄水能力和地貌指数的关系来描述蓄水能力的空间分布。坡面流流向采用多向流法来决定。应用结果表明,该模型模拟流量过程的精度较高,与三水源新安江模型、TOPMODEL基本相当;而且模拟的土壤蓄水量的空间分布也基本符合水文规律。更多还原

【Abstract】 A digital elevation model (DEM)-based distributed model is proposed to simulate the saturation -excess mechanism of runoff generation. With the establishment of the relationship between the soil water storage capacity and the topographical index, the spatial distribution of the soil water storage capacity over the watershed is simulated in the model. The direction of the overland flow is determined by using the multiple-direction allocation method rather than the steepest slope method. The results show that the model is capable of simulating the observed hydrographs at nearly the same efficiency as those of the Xinanjiang model and TOPMODEL, and the simulated spatial distribution of the soil moisture content over the whole watershed is reasonably in accordance with the hydrological reality.更多还原