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中文摘要：
运用最优化方法，选取北京市新一代天气雷达2007年4场降雨的基数据资料与对应的雨量计资料进行Z-R关系研究，对不同类型的降雨和不同距离范围的雷达估测点分别优化。结果表明：运用优化后的Z-R关系估测降水量的误差要比缺省的Z-R关系式直接计算出降水量的误差小得多：层状云降水的估测结果优于对流云降水的估测：距离雷达站较近的地区其估测结果优于较远的地区。
英文摘要：
The optimization approach was applied to the four rainfall events in 2007 to clarify the Z-R power relationship in Beijing region. Daily rainfall data and 6-minute resolution NEXRAD reflectivity data were collected, based on which 122 pairs of daily gauge and radar standard base data were prepared for each rain event. It was found that by using the optimized Z-R relationship the difference between the radar estimated precipitation and the gauge data could be further reduced than by using the default Z-R relationship. Rain estimation accurancy for sheet cloud rainfall events is better than that for convective cloud rainfall events. And rainfall estimates for the areas closer to the radar station are better than those farther away from the station.
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