TRMM降水数据在沙溪流域的精度验证  

Accuracy Validation of TRMM Precipitation Data in Shaxi River Basin

作　　者：罗火钱[1] 李成伟[2] 魏加华[3] 侯才水[1] 马广恩[1] LUO Huo-qian LI Cheng-wei WEI Jia-hua HOU Cai-shui MA Guangen(Fujian College of Water Conservancy and Electric Power, Fujian Yong＇an 366000 Earth System Science Research Center, Tsinghua University, Beijing 100084, China Tsinghua University State Key Laboratory of Water and Sediment and Water Resources and Hydropower Engineering, Beijing 100084)

机构地区：[1]福建水利电力职业技术学院,福建永安366000 [2]清华大学地球系统科学研究中心,北京100084 [3]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《亚热带资源与环境学报》2015年第4期69-76,共8页Journal of Subtropical Resources and Environment

基　　金：清华大学水沙科学与水利水电工程国家重点实验室开放基金资助项目"闽江沙溪数字流域模型建立及其应用"(sklhse-2014-B-06);福建省教育厅中青年教师教育科研项目(A类)"基于GIS与RS技术的洪水淹没分析研究"(JA13417)

摘　　要：以闽江沙溪流域2008—2012年水文站及雨量站的实测降水资料为基准数据,利用探测率、击中率、Heidke技巧评分指数、模糊评分、统计参数、降水重心等指标,对热带降水测量卫星(TRMM)的3B42V6和3B42V7两种降水产品进行精度检验和分析。结果表明:日尺度上,TRMM数据在多数情况下能比较准确预报降水是否发生,两种TRMM降水数据的探测率Pd、集中率FH、Heidke技巧评分指数的平均值都超过0.55,3B42V7的漏报率和空报率比3B42V6均有所降低;两种TRMM降水数据在不同降水量级的预测中精度由好到差依次为小雨、暴雨、大雨、中雨,其中小雨预报精度最好,达到良好水平以上,3B42V7的效果更好一点;两种TRMM数据与实测数据的一致性都比较好,其中3B42V6的数据均方根误差、偏差、相关系数都更小;月尺度上,3B42V6降水数据呈现旱季偏差大、雨季偏差小的特征,而3B42V7数据在全年的偏差都较小;年尺度上,两种TRMM数据的降水重心位置与实测数据的降水重心位置十分接近,纬度方向的变迁路径一致,TRMM数据的空间分布与实测数据比较吻合。Based on measured rainfall data from hydrological and rainfall stations in Shaxi River Basin from 2008 to 2012, by using detection rate, hit rate, Heidke skill score index, fuzzy score, statistical parameters and precipitation gravity centers, the two precipitation products of 3B42V6 and 3B42V7 from Tropical Precipitation Measuring Mission （ TRMM） were tested and compared. Results showed TRMM data can predict precipitation more accurately in most cases. For both 3B42V6 and 3B42V7 data, detection rate Pd, concentration ratio FH and average Heidke skills index are more than 0. 55.＆amp;nbsp;For false negative rate and null packets rate, 3B42V7 performs better than 3B42V6. For the two TRMM precipitation data at different levels, the forecast accuracy decreases from light rain to heavy rain, heavy rain and to moderate rain, in which 3B42V7 has a little better effects. The agreement be-tween TRMM data and measured data is good, especially 3B42V6 data′s RMSE deviation, correlation coefficients are less over day scale. Over month scale, 3B42V6 precipitation data presented the feature of large deviations in dry season and small deviations in rainy season. And 3B42V7 data has small de-viations over year scale. On year scale, the gravity centers of TRMM and measured data are close to one another, indicating their good consistence between the two data.

关 键 词：沙溪流域 降水数据 TRMM 3B42V6 TRMM 3B42V7 精度验证 

分 类 号：TV125[水利工程—水文学及水资源]