摘要
基于成都市及周边21个国家地面气象观测站1960~2019年逐日降水数据,采用标准化降水指数(SPI)方法,计算该市近60年季尺度和年尺度的干旱特征指数,并分析各时间尺度上的干旱演变特征。结果表明,总体上,成都市以轻旱、中旱为主,春夏季干旱多发,西部、北部地区干旱频率较高;近年来,成都市干旱强度和干旱站次比均呈显著增加趋势,意味着干旱等级和影响范围显著增加;成都市不同尺度干旱演变具有明显的阶段性特征。未来成都市各时间尺度的干旱强度演变趋势将持续增加,应引起水利、农林和气象部门的高度关注。
Based on the daily precipitation data from 21 national ground meteorological observation stations around Chengdu City from 1960 to 2019,the standardized precipitation index(SPI)method was used to calculate the drought index on seasonal and annual scale for the past 60 years.And then the characteristics of drought changes on various time scales was analyzed.The results indicate that in general Chengdu City is dominated by mild and moderate droughts,with frequent droughts in spring and summer,and the frequency of droughts in the western and northern regions is relatively high.In recent years,both the drought intensity and the ratio of drought stations in Chengdu City show a significant increasing trend,which means that the drought grade and the affected area increase significantly.The evolution of drought at different scales in Chengdu City has obvious stage characteristics.In the future,the evolution trend of drought intensity at various time scales in Chengdu City will continue to increase,which should arouse great attention from the departments of water conservancy,agriculture,forestry and meteorology.
作者
商守卫
王银堂
崔婷婷
李伶杰
刘勇
陈建东
SHANG Shou-wei;WANG Yin-tang;CUI Ting-ting;LI Ling-jie;LIU Yong;CHEN Jian-dong(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)
出处
《水电能源科学》
北大核心
2022年第12期26-29,63,共5页
Water Resources and Power
基金
国家重点研发计划(2019YFC0408903)
国家自然科学基金项目(52009081)
中央级公益性科研院所基本科研业务费专项资金(Y520014)。
关键词
气象干旱
标准化降水指数
干旱等级
干旱强度
干旱范围
成都市
meteorological drought
standardized precipitation index
drought grade
drought intensity
drought range
Chengdu City
