To clarify the applicability of multi-source precipitation data in the Hangzhou-Jiaxing-Hu_ zhou region and provide reliable data support for regional hydrometeorological research

water resource management and flood and drought early warning

this study uses the measured data from in-situ rain gauges as the reference. Three mainstream multi-source precipitation products of MSWEP

GPM and GLDAS are selected

and a point-to-point matching method is adopted to systematically evaluate their accuracy from 1998 to 2021 on annual

monthly and daily temporal scales. The results show that MSWEP presents the highest correlation

the lowest systematic bias and the best precipitation detection capability

making it more suitable for relevant studies of Hangzhou-Jiaxing-Huzhou region. This study can provide a scientific basis for the selection of multi-source precipitation data in this region

and also offer a reference for the subsequent refinement of accuracy evaluation of precipitation product and the expansion of hydrological application.