Assessing the utility of gridded rainfall datasets for streamflow simulation in Vietnam

What is it about?

The precise rainfall estimate with appropriate spatial and temporal resolutions is a key input to distributed hydrological models. However, networks of rain gauges are often sparsely distributed in developing countries, including Vietnam. To overcome such limitations, this study used some of the existing gridded rainfall products to simulate streamflow.

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Why is it important?

The accurate rainfall estimate with an adequate spatial and temporal resolution is a key input to distributed hydrological models. However, networks of rain gauges are often sparsely distributed in developing countries, such as Vietnam. Recently, many research institutes around the world have developed gridded datasets of rainfall for global and regional domains to overcome these shortcomings. However, fewer studies focused on the hydrological evaluation of gridded rainfall datasets, which will provide useful information for hydrological studies and water resources management. This study provided interesting findings from validating the suitability of gridded rainfall datasets (namely, APHRODITE, CFSRv2, PERSIANN-CDR, and TRMM 3B42V7) used for simulating streamflow in Vietnam. This work will give an insight into how the different gridded rainfall products perform in this region.