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A Rainfall-runoff Model in Semi-arid Area by the Remote
Sensing and Geography Information System Method |
XU Yu-qing, WANG Xi-zhi, LIANG Tian-gang, DAI Ruo-lan |
(State Key Laboratory of Arid Agrocology,Lanzhou University,Lanzhou,730000) |
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Abstract To evaluate the runoff volume available for agriculture irrigation in the loess plateau semi-arid area of China,six catchments were studied by means of GIS and RS method , and a rainfall-runoff model based on the parameters obtained by the GIS and RS was developed. These parameters are NDVI derived by the NOAA satellite images,area of catchments derived by the DEM of this area, average rainfall and runoff amount collected from the government hydrological stations. The multiple regression method was used to analysis these data . The calculated result by this model fits very well with the observed data in a experiment spot. So we think this model can give better result in calculating the runoff volume than the runoff contour method.
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Received: 22 September 1999
Published: 22 February 2012
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