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Article

Hydro-Meteorological Assessment of Three GPM Satellite Precipitation Products in the Kelantan River Basin, Malaysia

1
Geography Section, School of Humanities, Universiti Sains Malaysia, Penang 11800, Malaysia
2
Department of Agricultural Extension & Information System, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(7), 1011; https://doi.org/10.3390/rs10071011
Received: 29 April 2018 / Revised: 1 June 2018 / Accepted: 4 June 2018 / Published: 25 June 2018
The rapid development of Satellite Precipitation Products (SPPs) has heightened the need for a hydro-meteorological assessment of the Integrated Multi-satellite Retrievals for Global Precipitation Measurement (IMERG) products in different climate and geographical regions. Reliability of the IMERG early (IMERG_E), late (IMERG_L) and final (IMERG_F) run products in precipitation estimations was evaluated over the Kelantan River Basin, Malaysia from 12 March 2014 to 31 December 2016. The three IMERG products were then incorporated into a calibrated Soil and Water Assessment Tool (SWAT) model to assess their reliability in streamflow simulations. Overall, monthly precipitation variability is well captured by the three SPPs. The IMERG_F exhibited a smaller systematic bias (RB = 7.14%) compared to the IMERG_E (RB = −10.42%) and IMERG_L (RB = −17.92%) in daily precipitation measurement. All the three SPPs (NSE = 0.66~0.71 and R2 = 0.73~0.75) performed comparably well as precipitation gauges (NSE = 0.74 and R2 = 0.79) in the daily streamflow simulation. However, the IMERG_E and IMERG_L showed a significant underestimation of daily streamflow by 27.6% and 36.3%, respectively. The IMERG_E and IMERG_F performed satisfactory in streamflow simulation during the 2014–2015 flood period, with NSE and R2 values of 0.5~0.51 and 0.62~0.65, respectively. With a better peak flow capture ability, the IMERG_F outperformed the near real-time products in cumulative streamflow measurement. The study has also shown that the point-to-pixel or pixel-to-pixel comparison schemes gave comparable conclusions. Future work should focus on the development of a standardized GPM hydro-meteorological assessment framework, so that a fair comparison among IMERG validation studies can be conducted. View Full-Text
Keywords: GPM; IMERG; SWAT; Kelantan; Malaysia; precipitation; streamflow; hydrology; meteorology; satellite precipitation product GPM; IMERG; SWAT; Kelantan; Malaysia; precipitation; streamflow; hydrology; meteorology; satellite precipitation product
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MDPI and ACS Style

Tan, M.L.; Samat, N.; Chan, N.W.; Roy, R. Hydro-Meteorological Assessment of Three GPM Satellite Precipitation Products in the Kelantan River Basin, Malaysia. Remote Sens. 2018, 10, 1011. https://doi.org/10.3390/rs10071011

AMA Style

Tan ML, Samat N, Chan NW, Roy R. Hydro-Meteorological Assessment of Three GPM Satellite Precipitation Products in the Kelantan River Basin, Malaysia. Remote Sensing. 2018; 10(7):1011. https://doi.org/10.3390/rs10071011

Chicago/Turabian Style

Tan, Mou Leong, Narimah Samat, Ngai Weng Chan, and Ranjan Roy. 2018. "Hydro-Meteorological Assessment of Three GPM Satellite Precipitation Products in the Kelantan River Basin, Malaysia" Remote Sensing 10, no. 7: 1011. https://doi.org/10.3390/rs10071011

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