中国水利水电科学研究院学报2017，Vol.15Issue(3)：234-240,7.DOI:10.13244/j.cnki.jiwhr.2017.03.012
云南高原湖泊洱海流域年降水量时空分布特征研究
Study on spatiotemporal distribution characteristics of annual precipitation of Erhai Basin
李芸 1李宝芬 2张坤 1朱俊 1杨秋萍1
作者信息
- 1. 云南省水文水资源局,云南昆明 650051
- 2. 云南省水文水资源局昆明分局,云南昆明 650051
- 折叠
摘要
Abstract
In order to protect the ecological environment better,take advantage of water resources efficiently,and achieve sustainable use of lake resources of the Erhai Lake,we use the methods of mathematical statistics,trends and wavelet analysis to analyze area distribution,spatiotemporal change,change trend during the year and interannual change trend of the annual precipitation in the Erhai Lake basin.The results show that the annual precipitation in the Erhai Lake basin decreases from south to north,and from west to east.The precipitation is evidently affected by terrain and it increases with altitude in the north and west of the basin.The precipitation mainly concentrates in May to October,and it accounts for 84.9％ ～ 93.2％ of the annual precipitation.The precipitation in November to April in the following year accounts for only 6.8％ ～ 15.1％ of the annual precipitation.The maximum monthly precipitation occurs in July or August,and minimum monthly precipitation occurs in December.The interannual change of the annual precipitation in the Erhai Lake basin is relatively stable,but the trend decreases year by year.There are many cycles of the annual precipitation,such as abundance,drought,and abundance.关键词
洱海/流域/年降水量/特征Key words
Erhai Lake/basin/annual precipitation/characteristics分类
天文与地球科学引用本文复制引用
李芸,李宝芬,张坤,朱俊,杨秋萍..云南高原湖泊洱海流域年降水量时空分布特征研究[J].中国水利水电科学研究院学报,2017,15(3):234-240,7.
