Abstract
To calculate the return period of previous heavy rainfall events and to simulate rainfall data under a future climate, high-accuracy and high-resolution spatial rainfall data are required. While Precipitation Analysis (Radar-AMeDAS) by Japan Meteorological Agency is used in previous studies, X-band Multi-Parameter radar network (XRAIN) is used in this study to take the advantage of its higher-resolution. XRAIN has been pointed out to overestimate rainfall over mountainous area and around radar sites, we corrected these overestimation using Dual-frequency Precipitation Radar (DPR) data on the core satellite of the Global Precipitation Measurement (GPM) mission. We generate the extreme rainfall events using correction XRAIN data, and calculate 100-year probable rainfall and return period in Kanto region and Northern Kyushu region.
