水土保持通报2012，Vol.32Issue(1)：19-25,7.
汉江上游近50a来降水变化与暴雨洪水发生规律
Precipitation Change and Occurrence of Rainstorms and Floods in Upper Reaches of Hanjiang River During Last 50 Years
摘要
Abstract
Temporal and spatial changes of monthly/annual precipitation in the upper reaches of the Hanjiang River were analyzed by using empirical orthogonal function,moving average,and linear regression analysis.Results showed that annual precipitation manifested a decreasing trend during the last 50 years on the whole.Monthly precipitation varied with a major decrease in April and September,but a slight increase in June and August.A major climatic shift occurred in the upper reaches of the Hanjiang River from 1980 to 1988.The shift caused a change in atmospheric circulation pattern with a decreased intensity of southwest monsoon in spring and autumn and an increased intensity of southeast monsoon in summer.Southwest monsoon could induce rainstorms and floods from June to early-middle July and in September.In the periods,reduction in precipitation possibly caused a reduction in the occurrence of flood.Southeast monsoon could cause rainstorms and floods in the late July and August,in which the enhanced monsoon possibly cause an increase in the occurrence of rainstorm and flood.These findings are of great importance in water resources and energy development and flood mitigation in the upper reaches of the Hanjiang River.关键词
汉江上游/降水量/暴雨/洪水/气候变化Key words
upper reaches of the Hanjiang River/precipitation/rainstorm/flood/climatic change分类
天文与地球科学引用本文复制引用
殷淑燕,黄春长..汉江上游近50a来降水变化与暴雨洪水发生规律[J].水土保持通报,2012,32(1):19-25,7.基金项目
国家社会科学基金重点项目“历史时期汉江上游极端性气候水文事件及其社会影响研究” （）
国家自然科学基金重点项目“汉江上游（南水北调水源区）万年尺度古洪水水文学研究” （）
中央高校基本科研业务费专项基金项目“气候变化对陕西省经济作物物候影响研究” （）
陕西省教育厅自然科学研究计划项目“陕南汉江上游洪水水文学研究” （）
