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[1]ZHAO Qinrui,XU Lirong,SHI Yanfeng,et al.Spatiotemporal Characteristics of Extreme Precipitation in Jinan During 1970—2019[J].Research of Soil and Water Conservation,2022,29(04):140-149.

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Spatiotemporal Characteristics of Extreme Precipitation in Jinan During 1970—2019

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 140-149 Column: Public date: 2022-06-20

Title:: Spatiotemporal Characteristics of Extreme Precipitation in Jinan During 1970—2019

Author(s):: ZHAO Qinrui¹, XU Lirong¹, SHI Yanfeng², XU Zhenghe¹, XU Jing¹, XU Gongwei¹; (1.School of Water Conservancy and Environment, University of Jinan, Jinan 252000, China; 2.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China)

Keywords:: extreme precipitation; precipitation index; temporal and spatial variation; Jinan City

CLC:: P426.6

DOI:: -

Abstract:: The spatiotemporal variations of extreme precipitation were analyzed for Jinan(from 1970 to 2019)on the basis of 12 extreme precipitation indices derived from daily precipitation data at 49 meteorological stations with the help of linear regression, Mann-Kendall test, continuous wavelet transform and other methods. The main conclusions are as the followings. The annual precipitation(PRCRTOT)showed a significant increasing trend(p<0.05)at a rate of 31.04 mm/decade, while the continuous dry days(CDD)showed a significant decreasing trend(p<0.05)at a rate of 16.51 d/decade. The RD, R95 and R95P showed upward trends(p<0.05), and the SDII exhibited a downward trend(p<0.05), while non-significant increasing trends had been found for the other indices. Significant mutations were detected in the RD, R95, R95P, CDD and PRCRTOT in the study area, while there was no significant mutation in the other extreme precipitation indexes. Most extreme precipitation indexes had four main oscillation periods of 22～27-year, 14～17-year, 7～10-year and 4～5-year. There was great difference for most extreme precipitation indices in their spatial distributions. For example, the Rr25, Rx1day, Rx5day and PRCRTOT were high in the old downtown, the southeast mountainous area of Jinan City and Laiwu City, low in the northern suburbs of the study area. In general, extreme precipitation events occurred frequently in Jinan, so urban drainage should be emphasized to reduce the risk of waterlogging.

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Last Update: 2022-06-20