水资源保护Issue(6)：6-12,7.DOI:10.3969/j.issn.1004-6933.2013.06.002
长江源区和黄河源区降水量变化分析
Analysis of precipitation variation in source regions of Yangtze River and Yellow River
王冰冰 1荣艳淑 2白路遥1
作者信息
- 1. 河海大学水文水资源学院，江苏 南京 210098
- 2. 广东省电力设计研究院，广东 广州 510663
- 折叠
摘要
Abstract
Daily precipitation data from 22 meteorological stations in the source regions of the Yangtze River and the Yellow River from 1961 to 2010 were used to investigate the characteristics of annual, seasonal, and daily variations of precipitation over these regions from the perspective of probability, based on normal and gamma distributions. The results show that both the annual average precipitation and the standard deviation in the source region of the Yellow River were greater than those in the source region of the Yangtze River. Precipitation in the source region of the Yangtze River has increased significantly in recent years, resulting in the reduction of the difference between the two source regions. Intra-annual precipitation distribution was very uneven in the two source regions. Precipitation in the source region of the Yangtze River was mostly concentrated in the summer, and there was an obvious wet and dry difference in inter-annual precipitation. Precipitation in the source region of the Yellow River was concentrated in the summer, and the inter-annual variability decreased while the precipitation stability increased over time. Daily precipitation in the two source regions was mainly drizzle. However, the extreme daily precipitation could reach the level of storm rain. In recent years, with the increase of the shape and scale parameters, there has been a decreasing trend in the skewness and steepness of the probability distribution of daily precipitation, resulting in an increase in daily precipitation and an increasing trend of extreme daily precipitation.关键词
降水量/概率分布/长江源区/黄河源区Key words
precipitation/probability distribution/source region of Yangtze River/source region of Yellow River分类
天文与地球科学引用本文复制引用
王冰冰,荣艳淑,白路遥..长江源区和黄河源区降水量变化分析[J].水资源保护,2013,(6):6-12,7.
