SWAT模型土壤物理属性数据库构建方法探究

Construction method of SWAT model soil physical property database

SWAT模型应用广泛,具有综合、分布、基于物理机制且易与GIS集成的特征,能够准确模拟流域水文状况。SWAT模型已经在我国被广泛应用,但在应用过程中存在模型自带土壤属性数据库与中国实际情况不相符的问题。对此,以土壤物理属性数据库的构建为例,在较为系统地论述国内外相关研究进展的基础上,探究了土壤质地转换、基于SPAW软件的土壤属性数据库物理属性参数的确定方法,为建立符合国情的土壤属性数据库提供方法,并为后期SWAT模型的应用奠定了基础。

SWAT model is widely used. It is a comprehensive, distributed, and physical mechanism-based model integrated with GIS. SWAT model can be used to simulate the hydrological situation of watershed accurately and has already been applied to various regions in China. However, the original soil property database of the SWAT model is not consistent with the real situation of China. This study aims to construct the soil property database suitable to China. The transformation of soil texture was analyzed. The construction methods of physical property parameters for soil property database were performed based on the SPAW software. The results demonstrate that the method used in this study can offer proper tool to establish soil property database for China, as well as to further employ the SWAT model.