基于降水距平百分率的安徽省近50a干旱时空分布特征分析  

An Analysis of Drought Characteristics in Anhui Province During the Past 50 Years Based on Precipitation Anomaly Percentage

作　　者：李雪纯 赵君[1] 徐进超[1] LI Xue-chun;ZHAO Jun;XU Jin-chao(Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学,南京210044

出　　处：《中国农村水利水电》2018年第9期133-136,143,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51409141);中国气象局软科学研究重点项目(2017[20]);淮河流域气象开放研究基金资助项目(HRM201503)

摘　　要：基于安徽省1965-2014年15个气象站点的降水资料,以降水距平百分率(Pa)为干旱指标,从年和季(3个月)时间尺度定量地分析安徽省时空变化特征。研究结果表明:安徽省干旱在空间尺度上分布不均,北部和西南地区干旱发生频率高,中部和东南地区发生频率较低,自北向南干旱频率逐渐降低。通过对季节尺度干旱结果的比较可知,秋旱发生频率最高、强度最大、干旱范围最广,其次是夏旱、冬旱和春旱。其中春旱和秋旱有加重趋势,而夏旱和冬旱趋势不明显。Based on the precipitation data of 15 meteorological stations in Anhui Province from 1965 to 2014,the precipitation anomaly percentage（ Pa） is used as the drought index,the temporal and spatial characteristics of Anhui Province are quantitatively analyzed from the annual and seasonal（ 3 months） time scales. The results show that： the drought in Anhui Province is unevenly distributed on the spatial scale,the drought frequency is high in the north and southwest,the frequency is lower in the middle and southeast,and the drought frequency decreases gradually from north to south. By comparing seasonal drought results,the autumn drought has the highest frequency,the highest intensity and the widest drought range,followed by summer droughts,winter droughts,and spring droughts. Spring droughts and autumn droughts have an aggravated trend,while the summer droughts and winter droughts are not obvious.

关 键 词：降水距平百分率 季节干旱 干旱时空分布特征 干旱频率 

分 类 号：TV211[水利工程—水文学及水资源] S271[农业科学—农业水土工程]