Abstract
Focusing on the rainfall phenomenon in the snowy season in the snowy cold district, we investigated the rainfall estimation accuracy of the X-band multi-parameter radar operating in Hokkaido and Niigata district.
It was confirmed that estimation of radar rainfall based on AMeDAS rainfall was overestimated. In terms of rain intensity, the tendency to be estimated more excessively was observed at the time of weak rain such as observed as rainfall during the snowy season. On the other hand, during heavy rain leading to summer flooding, the total rainfall by the radar rain gauge was about the same as that by the AMeDAS rain gauge, and it was confirmed that the estimation error was smaller than at the time of weak rain. In addition, when comparing the rainfall estimation accuracy between the snowy season and the summer season, there was a point that was about the same at both weak rain and heavy rain, but there was a tendency for the snowy season to be estimated excessively depending on the location.
