Abstract
Presently, the number of rainfall stations in the Tonle Sap Lake (TSL) basin is not sufficient to ensure the reproducibility of the runoff discharge by a hydrological model. This chapter demonstrates that satellite-based rainfall is effective to improve the performance of a hydrological model in the TSL basin. Our study applied the rainfall estimate of the Global Precipitation Climatology Project (GPCP) for the TSL basin. The original GPCP showed similar spatial distribution to the gauged rainfall but with approximately 45% of overestimation. The bias-adjusted GPCP rainfall based on the gauged rainfall showed the improved performance of a hydrological model in the targeted six basins except for one basin. Comparing the Nash–Sutcliffe efficiency (NSE) of simulated runoff from gauged and satellite rainfall, the mean NSE in seven basins improved from 0.39 to 0.49 in the validation period.
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Fujii, H., Yoneda, I., Fujihara, Y., Hoshikawa, K., Nakamura, T. (2022). Improvement of a Hydrological Model Performance by Satellite Rainfall Product. In: Yoshimura, C., Khanal, R., Sovannara, U. (eds) Water and Life in Tonle Sap Lake. Springer, Singapore. https://doi.org/10.1007/978-981-16-6632-2_10
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