南水北调与水利科技2018，Vol.16Issue(1)：89-94,6.DOI:10.13476/j.cnki.nsbdqk.20180014
基于标准化降水蒸散指数的长江流域旱涝情势演变
Study on the evolution of droughts and floods in the Yangtze River basin based on the standardized precipitation evapotranspiration index
摘要
Abstract
In order to investigate the change tendencies of the droughts and floods in the Yangtze River basin,we used the stand-ardized precipitation evapotranspiration index on multiple time scales,based on the monthly precipitation and average tempera-ture data from the 133 meteorological stations in the whole basin during 1970-2012.The results showed that the overall drought conditions in the Yangtze River basin were not serious,while the drought tendency was prominent.Compared to the upstream region,the middle and lower reaches of the Yangtze River basin had a more prominent drought tendency,especially on longer time scales.In addition,the analysis of typical extreme meteorological events showed that the standardized precipitation evapo-transpiration index could well reflect the floods and droughts in the Yangtze River basin on different time scales.This suggests that the index can be used to precisely evaluate the extents and distributions of the hydrological regimes in this basin.关键词
旱涝情势/标准化降水蒸散指数/长江流域/多时间尺度Key words
droughts and floods/standardized precipitation evapotranspiration index/Yangtze River basin/multiple time scales分类
天文与地球科学引用本文复制引用
易彬,曾小凡,赵娜,雷坎..基于标准化降水蒸散指数的长江流域旱涝情势演变[J].南水北调与水利科技,2018,16(1):89-94,6.基金项目
国家自然科学基金(51239004 （）
91547208 （）
51309105 （）
51409109)National Natural Science Foundation of China(51239004 （）
91547208 （）
51309105 （）
51409109) （）
