A study of waterlog forecast method based on GIS in Liaoning region

In terms of average precipitation and runoff in Liaoning Province,spatial distribution of precipitation was obtained by inverse distance weighting(IDW) interpolation.Based on the spatial precipitation data,the system of waterlog forecast was founded with SCS hydrology model,and it was validated by the heavy precipitation process happened in August,2005.The results showed that this system could simulate waterlog caused by heavy precipitation very well.