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DOI10.3390/w11030613
Evaluation of TRMM Precipitation Dataset over Himalayan Catchment: The Upper Ganga Basin, India
Shukla, Anoop Kumar1; Ojha, Chandra Shekhar Prasad1; Singh, Rajendra Prasad2,3; Pal, Lalit1; Fu, Dafang2,3
发表日期2019
ISSN2073-4441
卷号11期号:3
英文摘要

Satellite based rainfall estimation techniques have emerged as a potential alternative to ground based rainfall measurements. The Tropical Rainfall Measuring Mission (TRMM) precipitation, in particular, has been used in various climate and hydrology based studies around the world. While having wide possibilities, TRMM rainfall estimates are found to be inconsistent with the ground based rainfall measurements at various locations such as the southwest coast and Himalayan region of India, northeast parts of USA, Lake Victoria in Africa, La Plata basin in South America, etc. In this study, the applicability of TRMM estimates is evaluated over the Upper Ganga Basin (Himalayan catchment) by comparing against gauge-based India Meteorological Department (IMD) gridded precipitation records. Apart from temporal evaluation, the ability of TRMM in capturing spatial distribution is also examined using three statistical parameters namely correlation coefficient (r), mean absolute error (MAE) and relative bias (RBIAS). In the results, the dual nature of bias is evident in TRMM precipitation with rainfall magnitude falling in the range from 100 to 370 mm representing positive bias, whereas, rainfall magnitude above 400 mm, approximately, representing negative bias. The Quantile Mapping (QM) approach has been used to correct the TRMM dataset from these biases. The raw TRMM precipitation is found to be fairly correlated with IMD rainfall for post-monsoon and winter season with R-2 values of 0.65 and 0.57, respectively. The R-2 value of 0.41 is obtained for the monsoon season, whereas least correlation is found for the pre-monsoon season with an R-2 value of 0.24. Moreover, spatial distribution of rainfall during post-monsoon and winter season is captured adequately; however, the limited efficiency of TRMM is reflected for pre-monsoon and monsoon season. Bias correction has satisfactorily enhanced the spatial distribution of rainfall obtained from TRMM for almost all the seasons except for monsoon. Overall, the corrected TRMM precipitation dataset can be used for various climate analyses and hydrological water balance based studies in the Himalayan river basins.


WOS研究方向Water Resources
来源期刊WATER
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/95141
作者单位1.Indian Inst Technol, Civil Engn Dept, Roorkee 247667, Uttarakhand, India;
2.Southeast Univ SEU, Sch Civil Engn, Sipai Lou 2, Nanjing 210096, Jiangsu, Peoples R China;
3.SEU Monash Univ Joint Res Ctr Future Cities, Nanjing 210096, Jiangsu, Peoples R China
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Shukla, Anoop Kumar,Ojha, Chandra Shekhar Prasad,Singh, Rajendra Prasad,et al. Evaluation of TRMM Precipitation Dataset over Himalayan Catchment: The Upper Ganga Basin, India[J],2019,11(3).
APA Shukla, Anoop Kumar,Ojha, Chandra Shekhar Prasad,Singh, Rajendra Prasad,Pal, Lalit,&Fu, Dafang.(2019).Evaluation of TRMM Precipitation Dataset over Himalayan Catchment: The Upper Ganga Basin, India.WATER,11(3).
MLA Shukla, Anoop Kumar,et al."Evaluation of TRMM Precipitation Dataset over Himalayan Catchment: The Upper Ganga Basin, India".WATER 11.3(2019).
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