高知大学MPレーダーネットワークによる降雨量推定の検証

Abstract

Heavy rainfall events frequently occur in Kochi Prefecture where is not covered by XRAIN network. Then, we are working to construct our own X-MP radar network in Kochi prefecture and to develop quasi-real time Quantitative Precipitation Estimation (QPE) algorithm. The present study aims to verify the accuracy of QPE derived from 3 X-band MP radars (Asakura, Monobe, and Aki radars) by comparing with the data of rain gauge. We employed R-Kdp relationship for heavy rain which has Zh ≧ 30 and Kdp ≧ 0.3 as a QPE method and R-Z relationship for weak rain. Results showed that our radars underestimated slightly except for Monobe radar which estimates almost same with the data obtained from rain gauge and the correlation between radar data and rain gauge data was about 0.8.