近20年重庆江津区旱涝时空特征分析  

Spatial and temporal characteristics of drought and flood in Jiangjin district of Chongqing in recent 20 years

作　　者：曾春芬 毛裕庆 董新宁[2] 陈钰婕 彭其琪 陈卫岳 Zeng Chunfen;Mao Yuqing;Dong Xinning;Chen Yujie;Peng Qiqi;Chen Weiyue(School of Geography and Tourism,Chongqing Normal University,Chongqing 401331,China;Chongqing Climate Center,Chongqing 401147,China)

机构地区：[1]重庆师范大学地理与旅游学院,重庆401331 [2]重庆市气候中心,重庆401147

出　　处：《江苏科技信息》2023年第7期71-76,共6页Jiangsu Science and Technology Information

基　　金：重庆市大学生创新创业训练计划项目,项目编号:S202110637050;重庆市教育委员会科学技术研究项目,项目编号:KJQN201900524;重庆市高校创新研究群体,项目编号:CXQT20015;中国气象局创新发展专项,项目编号:CXFZ2021J019。

摘　　要：极端天气频发背景下,旱涝灾害是影响重庆市的主要自然灾害之一,为了全面了解重庆市降水和旱涝时空特征,文章以重庆市江津区为例,基于Z指数,利用M-K趋势检验、突变检验、小波分析和空间插值分析其降水时空特征。结果表明:(1)江津区近20年洪涝频率为31.82%,干旱频率为22.73%,夏、冬季易出现极端旱涝;(2)降水年际变化呈上升趋势,春、秋两季降水增加,夏、冬两季降水减少,降水变化第一主周期为14 a;(3)降水空间分布为东南多西北少。除夏季外,春、秋、冬季的平均降水量均由东向西递减。研究结果对江津区防涝抗旱、工程建设等工作具有重要意义。Under the background of frequent extreme weather,drought and flood disasters are one of the main natural disasters affecting Chongqing.In order to comprehensively understand the spatio-temporal characteristics of precipitation and drought and flood in Chongqing,this paper takes Jiangjin district of Chongqing as an example,and analyzes its temporal and spatial characteristics of precipitation based on Z-index by using M-K trend test,mutation test,wavelet analysis and spatial interpolation.The results show that:(1)The frequency of flood and drought in Jiangjin district in the past 20 years is 31.82%and 22.73%,and the extreme drought and flood are easy to occur in summer and winter.(2)The interannual variation of precipitation showed an upward trend,with the precipitation increasing in spring and autumn and decreasing in summer and winter.The first main cycle of precipitation variation was 14 a.(3)The spatial distribution of precipitation is more in southeast and less in northwest.Except for summer,the average precipitation in spring,autumn and winter decreased from east to west.The research results are of great significance to the waterlogging and drought prevention and engineering construction in Jiangjin district.

关 键 词：旱涝时空特征 降水特征 重庆市江津区 

分 类 号：P426.616[天文地球—大气科学及气象学]