基于对数指数型蓄水容量曲线改进新安江模型

原新安江模型利用一个经验函数即抛物线来考虑下垫面张力水蓄水容量空间分布不均,其数学和物理基础不明确.基于地形指数和土地利用覆被类型与包气带厚度的相关关系可以推求出张力水蓄水容量曲线,与传统概化出的曲线不同,为更好地描述流域张力水蓄水容量空间分布,在此提出用一种新的函数——对数指数函数来代替新安江模型中的抛物线以改进新安...

Modified Xin'anjiang Model Based on a New Water Storage Capacity Curve

The original Xin'anjiang Model considers the spatial distribution of the water storage capacity with an empirical function,of which the mathematical and physical basis is not clear.Here,based on the relationship between the feature of underlying surface and the thickness of the aeration zone,the water storage capacity curve was derived,which is different from the traditional generalized curve.In order to better describe the distribution of the water storage capacity space,a new function-logarithmic exponential function to replace the parabola to improve the Xin'anjiang Model was proposed to use.Hydrological simulation of the Ningnan basin was carried out by using the Xin'anjiang Model before and after the modification.The results show that the modified Xin'anjiang Model has a small range of parameters and clear physical meaning.It is relatively simple,and the simulation effect of runoff on dry season is better than the original Xin'anjiang Model.