The Study on Radar-Rainfall Estimation with Radar and AWS

There are plenty of radar reflectivity-to-rainfall transformation schemes to estimate quantitative precipitation. KMA is developing radar-rainfall estimation system for providing QPE. The realtime derived power law scheme was studied with radar reflectivity data gathered by 4 radar sites which cover inland area. Even though the scheme is not sufficiently verified, the verification result show a promise the possibility. What parameter set is selected depends on the usage of Radar-Rainfall. If bias has higher a priority, small parameter b should be considered. Otherwise rmse is preferred to bias, larger b is selected. In order to apply to operation, the stability and consistency might be verified.