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《Journal of Tropical Meteorology》 2004-02
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ZHENG Yuan-yuan,XIE Yi-feng,WU Lin-lin, ZHU Hong-fang,WANG Dong-yong (Anhui Meteorological Observator, Hefei 230061, China)  
From Doppler radar volume scan data, recording pluviometer data and automatic weather station data, using optimization technique and probability-fitting technique, we estimated quantitative precipitation in different climatic regions over the Huaihe valley. By comparing the two techniques and analyzing errors, we knew that the relative error resulting from probability-fitting technique was small. Particularly, the estimator value was uniformly smaller than the observational value in probability-fitting technique. For optimization technique, the estimator ability for over 50 mm per day was not strong. By calculating mean relative errors on different range segments, the optimal estimator region was from 110~200 km. Besides, the error was mostly due to Z-I relationship抯 instability, precipitation echo抯 movement velocity and radar wave scan height抯 changing with different ranges. In addition, using rainfall data from nineteen automatic stations surrounding Hefei, we couducted comparative estimator experiment by Kalman filter adjustment technique, optimization technique and probability-fitting technique and got the conclusion that the Kalman filter adjustment technique is the best, followed by probability-fitting is better.
【Fund】: 科技部社会公益类项目“基于CINRAD雷达和卫星的淮河流域致洪暴雨研究”;; 安徽省科委项目“安徽省暴雨形成机理和定点、定时、定量基础研究”资助
【CateGory Index】: P426.6
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