摘要
安徽省降水时空分布不均,可利用水资源量较少,干旱灾害频发,为此,对安徽省近59年的干旱时空变化特征进行分析,降低干旱灾害对区域的影响。选用研究区内1960—2018年的降水与气温数据,利用标准化降水蒸散发指数(SPEI)结合干旱站次比、干旱频率等方法对全省59年干旱时空变化进行分析。研究发现:时间上,1960—2018年干旱整体呈小幅度下降趋势,春季、夏季与秋季季节性干旱无明显趋势性变化,冬季减弱趋势显著;空间上,安徽省境内的干旱发生以轻旱与中旱为主,淮河以北地区轻旱与特旱发生频率较高,淮河以南地区中旱与重旱发生频率较高,滁州市地区年际干旱减弱趋势显著,区域内季节性干旱趋势显著。SPEI指数在安徽省干旱分析研究中具有较好的适应性。
The spatial and temporal distribution of precipitation in Anhui Province is uneven,the amount of available water resources is less,and drought disasters occur frequently.Therefore the spatial and temporal changes characteristics of drought in Anhui Province in the past 59 years are analyzed to reduce the impact of drought disasters on the region.Data of precipitation and temperature in the study area from 1960 to 2018 were selected,and the spatial and temporal changes of 59 years of drought in the province were analyzed by using the standardized precipitation evapotranspiration index(SPEI)combined with drought station ratio and drought frequency.In terms of time,the study found that the overall drought from 1960 to 2018 showed a small decreasing trend,and the seasonal drought showed no obvious trend change in spring,summer and autumn,while the trend of decreased significantly in winter.Spatially,the drought in Anhui Province was dominated by light drought and moderate drought,light drought and special drought occurred in the north of the Huai River with a high frequency,the incidence of drought and severe drought in the south of the Huai River was higher,the trend of interannual drought in Chuzhou city has a signtcant weakening trend,and the seasonal drought trend in the region was significant.The SPEI index has good adaptability in the analysis of drought in Anhui Province.
作者
郑香悦
周亮广
黄骁力
ZHENG Xiangyue;ZHOU Liangguang;HUANG Xiaoli(School of Geographic Information and Tourism,Chuzhou University,Chuzhou 239000,China)
出处
《黑龙江工程学院学报》
CAS
2023年第2期14-21,共8页
Journal of Heilongjiang Institute of Technology
基金
国家自然科学基金青年科学基金项目(42101425)
安徽省高校优秀青年人才支持计划项目(gxyq2020055)
安徽省大学生创新创业计划项目(S202110377082)。
