Simulation of runoff based on digital Wujiang watershed

Congguo Tang; Congqiang Liu

doi:10.1117/12.713235

28 October 2006 Simulation of runoff based on digital Wujiang watershed

Congguo Tang, Congqiang Liu

Proceedings Volume 6421, Geoinformatics 2006: Geospatial Information Technology; 64211J (2006) https://doi.org/10.1117/12.713235
Event: Geoinformatics 2006: GNSS and Integrated Geospatial Applications, 2006, Wuhan, China

Abstract

Nonpoint source pollutants are mainly carried over land and into stream networks by surface runoff, and how to simulate surface runoff is the key to determining the loads of nonpoint source pollutants. The volume of surface runoff is chiefly controlled by climates, topographical characteristics and types of land use of the watershed. Five subwatersheds that can represent the whole watershed are chosen and their average annual precipitation, average annual surface runoff and percent land use are calculated respectively in the grid model of Wujiang River watershed based on climatic and hydrological data from 1965 to 2000 and land use data of 2000. The surface runoff is assumed to be a function of precipitation and land use and the multiple regression tool is used to determine the relationship between surface runoff, precipitation and percent land use. Thus the rainfall-runoff model for each land use type is built respectively. When calibrating these models, the result shows that the percent errors are all below 7%, which indicates that the accuracy of this simulation is high.

Citation Download Citation

Congguo Tang and Congqiang Liu "Simulation of runoff based on digital Wujiang watershed", Proc. SPIE 6421, Geoinformatics 2006: Geospatial Information Technology, 64211J (28 October 2006); https://doi.org/10.1117/12.713235

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