北京师范大学学报（自然科学版）2016，Vol.52Issue(3)：333-339,7.DOI:10.16360/j.cnki.jbnuns.2016.03.014
河西走廊内陆河流域极端降水特征分析
Characteristics of precipitation extremes for inland river basins in Hexi Corridor
摘要
Abstract
Water resources are important in maintaining the complex ecological system over inland river basins in arid areas.Precipitation is the main source for local water resources,and its temporal and spatial changes have great effect on eco-hydrological processes.The characteristics of precipitation extremes in the inland river basin have changed greatly due to global and regional warming.Based on daily precipitation data from 1960 to 2012 at 19 meteorological stations over three inland river basins in Hexi Corridor,three indicators,annual maximum precipitation for 1 day (AM1D),annual maximum precipitation for 5 days (AM5D)and total precipitation in wet days (TWD)are proposed to represent precipitation extremes in the study area.Five probability distribution models are used to analyze changes in frequency,intensity and contribution rate of precipitation extremes.GEV model is found to perform best to fit probability distribution of three indictors.AM1D,AM5D and TWD over 5-year return period have increased.Intensity of precipitation extremes has increased markedly after 2000.Contribution rate of extreme precipitation to total precipitation is increasing in the whole Shiyang River basin,the upper reach of Heihe River basin and the upper and lower reaches of Shule River basin during the past years,but decreasing in the middle and lower reaches of Heihe River basin and the middle reach of Shule River basin.关键词
极端降水/概率分布模型/频次/强度/贡献率Key words
precipitation extremes/probability density function/occurrence number/intensity/contribution rate分类
天文与地球科学引用本文复制引用
王月华,李占玲,赵韦..河西走廊内陆河流域极端降水特征分析[J].北京师范大学学报（自然科学版）,2016,52(3):333-339,7.基金项目
北京高等学校青年英才计划资助项目(YETP0654) （YETP0654）
中央高校基本科研业务费专项资金资助项目(35832015028) （35832015028）
