摘要
利用雷达估算太行山降水对于海河流域水循环解析、变化预测及流域水资源管理具有重要意义。本文利用2013和2014年6—9月太行山东部中低山区多普勒天气雷达反射率(Z)产品和自动雨量站降水(I)数据,采用不同滑动时间窗(1~5h)估算Z-I关系,利用2013—2014年45次降水事件验证不同时间窗Z-I关系在小雨、中雨和暴雨情况下的精度,并针对2013年7月9日降水事件进行个例分析。结果表明:不同滑动时间窗Z-I关系反演降水精度不同,误差随滑动时间窗增大,呈现先下降后上升的趋势,其中2h滑动时间窗误差最小。对于不同量级降水的反演,2h滑动时间窗Z-I关系对中雨的改进最大。个例分析表明:滑动时间窗Z-I算法的主要优势在于改善其他算法对雨强较大降水的低估。
Precise estimation of precipitation in Taihang Mountains is crucial for understanding water cycle and providing support for water management in Haihe River Basin.By using Doppler radar,this study developed the Z-I relationships with different time windows（1-5 h）in three counties in eastern side of Taihang Mountains using radar reflectivity（Z）and rain gauge data（I）from June to September during2013-2014.By dividing the 45 precipitation events into three categories：Light,moderate and heavy,precipitation was precisely estimated from different Z-I relationships under different categories.Take the rainfall event on 9 July 2013 as an example.It showed that（1）the errors of estimated precipitation from different time windows declined firstly,then rose up as the time windows moved from 1 hto 5 h,and the lowest error appeared in 2 h.（2）The 2 hZ-I relationship greatly improved the precision of moderate rain.（3）The estimation of heavy rain also improved when the 2 hZ-I relationship was applied to the rainfall event that happened on 9 July 2013.
作者
高烽
周新尧
孔凡超
杨永辉
郭迎春
孙强
GAO Feng;ZHOU Xinyao;KONG Fanchao;YANG Yonghui;GUO Yingchun;SUN Qiang(Key Laboratory of Agricultural Water Resources/Hebei Laboratory of Agricultural Water-Saving/ Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021;University of Chinese Academy of Sciences, Beijing 100049;Hebei Meteorological Observatory, Shijiazhuang 050021;Hejian Bureau of Agriculture in Hebei Province, Cangzhou 062450)
出处
《气象》
CSCD
北大核心
2018年第4期538-547,共10页
Meteorological Monthly
基金
国家自然科学基金项目(41671021)
河北省自然科学基金项目(D2015503016)共同资助
