自然资源学报

自然资源学报 ›› 2013, Vol. 28 ›› Issue (8): 1414-1425.doi: 10.11849/zrzyxb.2013.08.014

• 资源研究方法 • 上一篇    下一篇

TRMM卫星降水数据在雅鲁藏布江流域的适用性分析

吕洋1 2, 杨胜天1 2, 蔡明勇1 2, 周秋文1 2, 董国涛3   

  1. 1. 北京师范大学遥感科学国家重点实验室, 北京 100875;
    2. 北京师范大学地理学与遥感科学学院, 北京 100875;
    3. 黄河水利委员会 黄河水利科学研究院, 郑州 450003
  • 收稿日期:2012-08-28 修回日期:2013-01-25 出版日期:2013-08-20 发布日期:2013-08-19
  • 作者简介:吕洋(1989- ),男,硕士研究生,研究方向为水文资源遥感。E-mail:luyang0831@gmail.com
  • 基金资助:
    水利部公益性行业科研专项经费项目"中印东段争议区水资源遥感监测与评价研究"(201101037);国家科技支撑计划"周边地缘环境信息建模与安全评估关键技术研究"(2012BAK12B03);中央级公益性科研院所基本科研业务费专项资金(HKY-JBYW-2013-22)。

The Applicability Analysis of TRMM Precipitation Data in the Yarlung Zangbo River Basin

LU Yang1 2, YANG Sheng-tian1 2, CAI Ming-yong1 2, ZHOU Qiu-wen1 2, DONG Guo-tao3   

  1. 1. State Key Laboratory of Remote Sensing Science, Beijing Normal University, Beijing 100875, China;
    2. School of Geography, Beijing Normal University, Beijing 100875, China;
    3. Yellow River Institute of Hydraulic Research, Zhengzhou 450003, China
  • Received:2012-08-28 Revised:2013-01-25 Online:2013-08-20 Published:2013-08-19

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60 | 40

摘要： 以雅鲁藏布江流域为研究区,利用16个气象站点的实测降水量在月尺度和日尺度上验证了TRMM(Tropical Rainfall Measurement Mission)卫星降水数据的精度,并在此基础上基于TRMM月降水数据分析了雅鲁藏布江流域的降水时空分布特征。结果表明:在整体上,TRMM月降水数据与站点实测降水量相关系数R=0.902,斜率K=0.849,数据精度较高,数值上比站点实测降水量略微偏低;就单个站点而言,大部分站点相关系数较高,偏差较小,但波密站相关系数相对较低,江孜站和南木林站数据偏差相对较大。TRMM日降水数据与站点实测降水量相关系数R=0.466,斜率K=0.451,数据精度较低,与站点实测降水量一致性较差。在降水空间分布上,雅鲁藏布江流域整体呈现由西向东逐渐递增的趋势,不同区域间差异极其明显;在降水时间分布上,大部分降水集中在6至9月,12月至第二年2月很少有降水发生。

关键词: TRMM, 雅鲁藏布江, 降水

Abstract: The Yarlung Zangbo River is a trans-boundary river of crucial importance to China with great potentiality in hydropower resources. However, the precipitation gauge stations are dramatically sparse in this basin due to high elevation, complex topography and severe climate, especially in the western part of the basin. Precipitation estimation from satellites provides potential alternatives in precipitation measurements in regions where conventional precipitation gauges are not readily available. In this study, the performance of TRMM (Tropical Rainfall Measurement Mission) monthly and daily precipitation data over 1998－2010 were evaluated in the Yarlung Zangbo River Basin with rain gauges from 16 meteorological stations. The evaluation revealed strong correlation and little numerical biases between TRMM monthly precipitation data and rain gauges in general, while the correlation coefficient in Bomi station was comparatively lower and the biases in Jiangzi station and Nanmulin station were comparatively higher. While on the daily basis, the correlation between TRMM precipitation and rain gauges is relatively weak. On the basis of the evaluation, the spatial and temporal patterns of the average annual and monthly precipitation over the basin were analyzed with TRMM monthly precipitation data. There is an increasing trend from west to east and strong spatial variability in the average annual precipitation. Precipitation peaks in July and most of the total annual precipitation occur during June to September. Precipitation hardly occurs during December to February next year.

Key words: Yarlung Zangbo River, TRMM, precipitation

中图分类号: 

  • P468.0+24