P70 Hydrological simulation using WRF output data

Ma, Xieyao, Fujita, Hara, Kimura, RIGC/JAMSTEC, and Wakazuki, University of Tsukuba, Japan

In this study, we indicated calculation of river discharge by using a regional climate model output as input data to a hydrological model to find an approach to clarify the possible effects of climate change on water resources. The method was applied into the Tone River and Shinano River, Japan. The resolution of regional climate model output is 6-km and the period of simulation is 30-year from Oct. 1979 to Oct. 2000. The results showed that the characteristic of river discharge in seasonal variation could be represented in both rivers. A future hydrological response to global warming under the 2080s to 2100s conditions was investigated using a pseudo-global-warming method. The results showed that the characteristic of river discharge in seasonal variation could be represented and there were overestimated compared with measured one. Compared with the reproduced discharges of 1980s, 1990s and 2000s, the discharges will be increased by in winter season from December to March under the climate change projection of 2080s, 2090s and 2100s.