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[1]YANG Dong,LIU Wen,ZHU Jingxuan,et al.Accuracy Evaluation and Application of the TRMM Precipitation Data in Dongting Lake Basin[J].Research of Soil and Water Conservation,2019,26(03):279-284.

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Accuracy Evaluation and Application of the TRMM Precipitation Data in Dongting Lake Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 03 Page number: 279-284 Column: Public date: 2019-04-12

Title:: Accuracy Evaluation and Application of the TRMM Precipitation Data in Dongting Lake Basin

Author(s):: YANG Dong^1,2, LIU Wen^1,2, ZHU Jingxuan¹, ZHANG Hongtao¹, LI Xuezhang³, XU Xianli³; 1. College of Resources and Environment Science, Hunan Normal University, Changsha 410081, China;
2. Key Laboratory of Geospatial Big Data Mining and Application, Changsha 410081, China;
3. Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China

Keywords:: TRMM 3B43; satellite precipitation; accuracy evaluation; Dongting Lake Basin

CLC:: P426.6

DOI:: -

Abstract:: The high-resolution satellite rainfall products provide a great opportunity to monitor precipitation. However, the accuracies of these products need assessment before use. The objective of this study is to evaluate the accuracies and adaptabilities of the application of TRMM (Tropical Rainfall Measuring Mission) 3B43 V7 data in the Dongting Lake Basin. The TRMM data and 27 meteorological precipitation data in the Dongting Lake Basin were collected from 1998 to 2011. The indices including correlation coefficient (r), root-mean-square error (RMSE) and mean square skill score (MSSS) were used to assess the accuracy of the TRMM data at the monthly and seasonal scales, respectively, within the basin, and the spatial distribution characteristics of each index was investigated. The results showed that:(1) on the monthly scale, the TRMM data had a good fit with the observed precipitation data with the correlation coefficient of 0.89; overall, the TRMM data was higher than that of the observed precipitation data in most areas of the basin; (2) at the seasonal scale, the TRMM data were comparatively more accurate with the correlation coefficient of 0.94, and the reliability was higher; (3) the temporal distributions of the two kinds of data were similar in the Dongting Lake Basin, the precipitation was higher in spring and summer while it was lower in autumn and winter. The distribution of precipitation is uneven in the Dongting Lake Basin, which reduces from the southeast to the northwest.

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