RUNOFF ANALYSIS ON THE 1998 FLOOD IN CHINA USING THE GAME RE-ANALYSIS DATA

Abstract

The objective of this study is to investigate the applicability of re-analysis data in hydrological forecasting. In this study, flood runoff analysis of the historical 1998 floods occurred in Changjiang and Songhuajiang river basins, China has been carried out by using the GAME re-analysis data (version 1.5). For these two continental river basins, distributed hydrological models with spatial resolution 0.5 by 0.5 degree are built by using our distributed modeling system. For each basin, calculated hydrographs are derived at three hydrological stations. They are compared with the observed ones. It is shown that the flood volume and timing of peak discharge are well represented. This shows that GAME re-analysis data is fully applicable. And this also implies the possibility to apply re-analysis data to hydrological forecasting of the continental scale river basins.