流れの制御による集中豪雨の弱体化に向けた数値感度解析

抄録

Localized and sustained heavy rainfall caused by the training over Hiroshima, Japan in August 2014 is simulated by the Multi-Scale Simulator for the Geoenvironment (MSSG) model. Subsequently, we seek for a control method toward the weakening of the heavy rainfall. In the high-resolution simulation case, the rainy area formed a line around Hiroshima, and the maximum precipitation per 1 hour reached 99 mm. The vertical cross-section of the hydrometeor has confirmed that the line-shaped surface precipitations are caused by several training cumulonimbus. These results agree with the data obtained with Japan Meteorological Agency radar. We then conduct sensitivity analysis of the rainy area and the precipitation intensity with differently-controled initial conditions.