抚河流域极端降水变化及其对输沙量的影响

Changes in Extreme Precipitation in the Fuhe River Basin and Its Impact on Sediment Transport

本文基于抚河流域1960—2018年逐日降水和输沙量的历史数据,分析极端降水变化规律及其对输沙量的影响。结果表明:抚河流域8种极端降水指数均呈增长趋势;8种极端降水指数空间上总体呈现“北高南低”“东高西低”和“南高北低”三种格局;抚河输沙量呈不显著减小趋势(Z=-1.48),人类活动是流域输沙量减小的主导因素;极端降水指数和输沙量呈正相关,总体上存在1年、4年、16年的周期性显著共振关系。

Based on the historical daily precipitation and sediment transport data from 1960 to 2018 in the Fuhe River Basin,this paper analyzes the changing patterns of extreme precipitation and its impact on sediment transport.The results indicate that all eight indices of extreme precipitation in the Fuhe River Basin show an increasing trend.Spatially,these indices generally present three patterns:“high in the north,low in the south”,“high in the east,low in the west”,and“high in the south,low in the north”.The sediment transport of the Fuhe River shows a non-significant decreasing trend(Z=-1.48),with human activities being the dominant factor in the reduction of sediment transport in the basin.There is a positive correlation between extreme precipitation indices and sediment transport,with significant resonant relationships at periodicities of 1 year,4 years,and 16 years overall.