Applicability of multi-source precipitation merging products during rainstorms in Rizhao
In order to evaluate the applicability of the fused precipitation products in Rizhao City,the 25 rainstorm processes occurring from May to October in 2019 to 2021 and from May to July in 2022 were evaluated and tested using the observed precipitation data of hydrological and Meteorological departments in Rizhao City.The results show that:(1)the spatial distribution of fused and observed precipitation is of good consistency,and the integrated precipitation products can provide a reference in areas without precipitation observations.(2)The time series of fused precipitation and observed precipitation have good consistency,with correlation coefficients above 0.9,and the root mean square errors of the long series evaluations are all within 1.0 mm in each month.Both the mean error and the root-mean-square error of the long-series assessment results increase with the increase of hourly rainfall intensity.(3)The fusion precipitation underestimates the precipitation in the rainstorm process and short-term heavy precipitation,and the difference between the two increases with the increase of hourly rainfall intensity.When the fused precipitation is larger/smaller than the observed precipitation,the difference between the two is smaller/larger;in the evaluation of extreme points of rainstorms,the fusion precipitation is smaller than the observed precipitation,and the difference of extreme values is mostly within±20 mm.
precipitation merging productsapplicabilityindependence testRizhao City
国家科技期刊平台
NSTL
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