Spatial discretization of distributed hydrological response units for SWAT

Jicai Ning, Zhiqiang Gao, Wenjiang Zhang, Runhe Shi, Wei Gao, Wei Gao, Ni-Bin Chang, Jinnian Wang
2014 Remote Sensing and Modeling of Ecosystems for Sustainability XI  
The Soil and Water Assessment Tool (SWAT) is a well established eco-hydrologic model. For the semi-distributed hydrological model, Hydrological Response Units (HRUs) are the basic modeling units, which are defined by land use, soil and slope. Land surface patches within one Hydrological Response Units (HRUs) should bear identical hydrological properties (including land use, soil, slope and management) and thus have similar hydrological responses. However, it is difficult to determinate the
more » ... al locations and to describe the interactions between different HRUs. This study proposed one schema to discretize HRUs for SWAT on the basis of generalized data input. Within a small watershed of Taihu Basin, the data of land use and soil were generalized for discretizing SWAT HRUs. The SWAT model was modified with the discretized HRUs. The resulted showed that the SWAT improved by discretization schema could be more sensitive the runoff lag process and thus achieved better simulation accuracy. Downloaded From: on 08/04/2015 Terms of Use: Proc. of SPIE Vol. 9221 922105-2 Downloaded From: on 08/04/2015 Terms of Use:
doi:10.1117/12.2058303 fatcat:zyoknfywo5gnxeygx25rb467si