The Rainfall Measurement Using Dual-Polarization Doppler Weather Radar

Abstract

In order to play a part in evaluation and manage of water resource for weather radar, the quantitative rainfall measurement of dual polarization doppler weather radar is developed. And based on the observed values of ombrometer, the differences of the measured values derived from different methods are analysed. The results show: The rainfall using KDP to calculate, i.e. R(KDP) method, is proximal to the data of ombrometer; R(ZH) and R(ZH, ZDR) method is underestimate rainfall obviously; R(ZDR, KDP) method is overestimate rainfall. With further analysis, rainfall measured by dual-polarization radar, especially from R(KDP) method, has higher precision, and provide the spatial distribution of the rainfall and the position of strong center well.