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Proceedings Paper

Simulation of runoff based on digital Wujiang watershed
Author(s): Congguo Tang; Congqiang Liu
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Paper 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.

Paper Details

Date Published: 28 October 2006
PDF: 8 pages
Proc. SPIE 6421, Geoinformatics 2006: Geospatial Information Technology, 64211J (28 October 2006); doi: 10.1117/12.713235
Show Author Affiliations
Congguo Tang, Institute of Geochemistry (China)
Chinese Academy of Sciences (China)
Congqiang Liu, Institute of Geochemistry (China)

Published in SPIE Proceedings Vol. 6421:
Geoinformatics 2006: Geospatial Information Technology
Huayi Wu; Qing Zhu, Editor(s)

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