TRMM卫星降水数据在喀斯特山区的适用性分析——以贵州省为例  

Analysis on Applicability of TRMM Precipitation Data in Karst Areas——A Case Study in Guizhou Province

作　　者：李威[1,2] 蒋平[3] 赵卫权 兰良鸿 

机构地区：[1]贵州省山地资源研究所,贵阳550004 [2]重庆师范大学三峡生态环境遥感研究所,重庆400047 [3]贵州省第三测绘院,贵阳550004 [4]贵州省山地资源研究所有限公司,贵阳550004

出　　处：《水土保持研究》2016年第1期97-102,共6页Research of Soil and Water Conservation

基　　金：国家科技支撑计划课题"西南山丘村镇饮用水安全保障技术集成与示范"(2012BAJ25B09)

摘　　要：以1998—2012年研究区26个气象站点实测降水数据和同期TRMM 3B43降水数据为数据源,在GIS技术的支持下,运用相关系数(R)、相对误差(BIAS)分析和探讨月、季、年尺度和单个站点的TRMM 3B43降水数据在研究区的适用性和分布规律。分析表明:(1)TRMM 3B43降水数据和气象站点观测数据的相关性较好,在年尺度上,TRMM 3B43降水数据总体精度较高,相关系数R为0.75,但也存在个别站点误差较大,最大误差达到19.13%,总体上TRMM 3B43降水数据比站点观测数据稍微偏大;(2)季节尺度上,TRMM 3B43降水数据和站点观测数据春季的相关系数R达到0.82,要高于秋季和冬季。夏季较差,但相关系数R也达到0.79,且均通过置信度100%检验;(3)TRMM 3B43降水数据在月尺度上数据精度最高,相关系数R达到0.91;(4)数据个体精度检验上选取了19个气象站点,各个观测站点的拟合优度R2均在0.75以上,相关系数R均大于0.80,结果表明TRMM 3B43降水数据在研究区具有较好的适用性。Based on the rainfall data from 26 meteorological stations and TRMM 3B43 during the period from1998 to 2012in Guizhou Province and the support of the GIS technologies,the correlation coefficient（R）and relative error（BIAS）have been utilized to analysis the application and distributional features for rainfall data of TRMM 3B43 in individual sites in the view of scales ranging from month and quarter to year in Guizhou Province.The results indicated that：（1）there was the good agreement between the data from TRMM 3B43 and meteorological stations,at the year scale,the accuracy of the rainfall data from TRMM 3B43 is relatively high and the R2 can reach up to 0.75.However,existence of great error in certain stations and maximum can reach to 19.13%.In general,the accuracy of rainfall data from TRMM 3B43 is greater than from meteorological stations;（2）in terms of seasons,the linear correlation coefficient（R）between the rainfall data from TRMM 3B43 and meteorological stations can up to 0.82 in spring,this value is greater than those in fall and winter.The linear correlation in summer is poor,reaching to 0.79 and through the test under confidence is100%;（3）the high quality of accuracy for TRMM 3B43 can be obtained on the month scale,and Ris 0.91;（4）rainfall data from 19 meteorological stations have been used to test the individual data accuracy,and the fitting outcome of R2 and R with the TRMM 3B43 reaches to 0.75 and 0.80,respectively,indicating that the rainfall data from TRMM 3B43 is applicable in this region.

关 键 词：贵州省 TRMM 3B43 相关系数 降水 

分 类 号：P333.1[天文地球—水文科学]