Temporal and spatial variation of extreme precipitation in the Longchuan River Basin in 1978-2015 years

2018 International Conference on Air Pollution and Environmental Engineering

生态环境科学

Cheng, Shiyue^1 ; Xu, Lirong^1 ; Qin, Wei^2,3 ; Guo, Qiankun^2,3

School of Water Conservancy and Environment, University of Jinan, Jinan, China^1

Department of Sediment Research, China Institute of Water Resources and Hydropower Research, Beijing, China^2

Research Center on Soil and Water Conservation of the Ministry of Water Resource, Beijing, China^3

关键词: Extreme precipitation;    Extreme precipitation events;    Interannual variation;    Kriging interpolation methods;    Meteorological station;    Precipitation intensity;    Regional characteristics;    Temporal and spatial variation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/208/1/012026/pdf
DOI  :  10.1088/1755-1315/208/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Based on the daily precipitation data of 26 meteorological stations in the Longchuan River Basin from 1978 to 2015, the spatial distribution and trend of extreme precipitation events in the Longchuan River Basin were analyzed by trend analysis and Kriging interpolation method. The results showed that the spatial distribution of the annual mean values of each extreme precipitation index in the basin has obvious regional characteristics. The total extreme precipitation, annual precipitation, extreme precipitation days and rainy days in the southwest were higher than those in other regions, however, the extreme precipitation thresholds and daily precipitation intensity were lower than those in other areas, and the opposite occurred in the northeast. In addition to, the interannual variation of the extreme precipitation and daily precipitation intensity showed a trend of growth while the remaining indicators showed a downward trend from 1978 to 2015, indicating that both the precipitation intensity and extreme precipitation in the region increased.