摘要
根据皖北及其周边的16个气象站点1961~2013年每日降水数据,利用SSPI指数和夏季长周期旱涝急转指数,分析了皖北年降水量时空变化、旱涝发生频率的空间分布特征及旱涝急转规律。结果表明,皖北的年降水量呈微弱的减少趋势,呈现出从西北向东南递增的趋势;皖北干旱与洪涝在不同时间尺度下分布较为均匀,呈现出反复交替出现的情况。从时间尺度看,秋季为旱涝高发时期;从空间尺度看,淮北、宿州、蚌埠为秋季干旱高发区,阜阳、宿州为春季洪涝高发区;旱涝急转事件均为旱转涝事件,在2000年之后旱涝急转事件具有更高的发生频率,占53年中旱涝急转次数的40%。
Based on the data of precipitation supported by 16 meteorological stations in Northern Anhui and its surrounding area,standard precipitation index and long cycle drought-flood abrupt alternation index were used to analyze the tendency and spatial-temporal variation of the annual precipitation,the spatial distribution characteristics of drought-flood frequency and the characteristics of the abrupt alternations of drought-flood in Northern Anhui.The results show that the annual precipitation appears a weak downward trend;precipitation generally appears upward trend from the northwest to southeast.The distribution of drought-flood in different time scales is relatively uniform,and it appears alternately in Northern Anhui.The autumn is drought-flood peak period;from the spatial scales,Huaibei,Suzhou,Bengbu are high incidence zone of autumn drought;Fuyang and Suzhou is high incidence zone of spring floods.All the abrupt alternations of drought-flood are from drought to flood.After the 2000 s,the frequency of the abrupt alternations of drought-flood increased significantly.It accounted for 40% of the total number of the abrupt alternations of drought-flood in 53 years.
作者
白恒
严登明
翁白莎
赵晓祥
王俊锋
BAI Heng;YAN Deng-ming;WENG Bai-sha;ZHAO Xiao-xiang;WANG Jun-feng(College of Environmental Science and Engineering,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University,Shanghai 201620,China;Department of Water Resources,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;College of Environmental,Jinan University,Guangzhou 511486,China)
出处
《水电能源科学》
北大核心
2019年第1期1-4,共4页
Water Resources and Power
基金
国家重点研发计划(2016YFA0601503
2017YFC0404504)
关键词
皖北地区
旱涝事件
SSPI指数
夏季长周期旱涝急转指数
Northern Anhui
drought-flood events
standard precipitation index
long cycle drought-flood abrupt alternation index