IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Alternative TitlePrecipitation Data Merging Methods of Satellite TRMM and its Application in Basin Hydrological Simulation
Thesis Advisor程根伟
Degree Grantor中国科学院研究生院
Place of Conferral北京
Degree Name博士
Degree Discipline自然地理学
KeywordTrmm卫星 降雨精度评估 降雨数据融合 流域水文模拟
Other AbstractTRMM satellite remote sensing rainfall products, due to its more reasonable spatio-temporal distribution and a wide detection range, are conducted into the runoff process research of regions without or lack data. The upper reach of Yangtze River Basin was selected as the investigation area in this thesis research. Based on validation study of the TRMM remote sensing satellite rainfall, several merged rainfall methods were analyzed. In addition, the merged rainfall datasets were used to watershed hydrological simulation in the upper reaches of Yangtze River Basin. The validation study results indicated that the TRMM satellite rainfall data have notable discrepancies on rainfall amounts and rain event detection on 3-hour scale and it is necessary to be corrected by gauged rainfall before application. The merged methods research confirm that it is necessary to correct the rain event deviation of TRMM-satellite rainfall in advance, and then the traditional methods can adequate to gain more precision merged rainfall time series. The hydrological simulation research result based on the merged rainfall show that the streamflow simulation accuracy has obviously improved in each temporal scale. However, the flood process simulation accuracy based on the merged rainfall was slightly underestimation comparing with that based on the gauged rainfall; but the peak flow and peak time event simulation accuracy based on the merged rainfall was slightly underestimation comparing with that based on the gauged rainfall. From what has been discussed above, TRMM satellite rainfall data has very good application value in the upper reaches of Yangtze River basin. The results of this research can provide technical methods of the related research in other areas.
Document Type学位论文
Recommended Citation
GB/T 7714
杨云川. 遥感卫星TRMM降雨数据融合及其在流域水文模拟中的应用[D]. 北京. 中国科学院研究生院,2013.
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