2次元セル追跡手法に基づいた高詳細レーダ降雨情報による短時間降雨予測手法の開発

抄録

For flood control measures in urban areas caused by sudden localized torrential rain, highly accurate rainfall prediction is very useful even in 10 minutes ahead, but it has been difficult for a long time to predict localized and rapidly developing rainfall by conventional methods. However, the Ministry of Land, Infrastructure, Transport and Tourism's XRAIN, which enables high-frequency and high-resolution observation, changed the situation drastically. This paper shows that local heavy rain can be predicted with high accuracy by newly developing a method to consider individually moving speed and direction, and development and weakness for individual cumulonimbus clouds. This method is expected to contribute to the reduction of heavy rain disasters in urban areas, such as the support of rainwater removal operations in sewerage systems, and to develop in cooperation with the early detection method of heavy rain eggs.