Quantity Precipition Estimation and Statistical Characteristics of Raindrop Size Distribution and Radar Data

The statistical characteristics of raindrop size distributions (DSDs) and vertical structures of rainfallduring the past ten years in Northern area of Taiwan are studied using measurements from a ground-baseddisdrometer network and radar network in the northern part of Taiwan. Based on rainfall intensity andvertical structure of radar reflectivity the observed rainfall will be classified into convective, stratiform andshallow precipitation types. The statistical characteristics of DSDs based on different ground-baseddisdrometers will be intercompared and analyzed. Based on the statistics of DSDs and radar reflectivity, theZ-R relationship will be constructed with respective to different season and different precipitation type.Finally rainfall estimation relationships using polarimetric radar measurements will be derived comparedand discussed. An optimum radar QPE technique could be constructed in Taiwan.