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《Acta Ecologica Sinica》 2019-10
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Temporal and spatial characteristic of drought in Huai River Basin based on standardized precipitation evapotranspiration index

XIA Min;SUN Peng;ZHANG Qiang;YAO Rui;WANG Youzhen;WEN Qingzhi;Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huai River Basin, Anhui Province, School of Geography and Tourism, Anhui Normal University;Key Laboratory of Water Conservancy and Water Resources of Anhui Province, Water Resources Research Institute of Anhui Province and Huai River China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research;State Key Laboratory of Surface Process and Resource Ecology, Beijing Normal University;Key Laboratory of Environmental Change and Natural Disaster, Ministry of education, Beijing Normal University;  
The daily temperature, precipitation of 149 meteorological stations and historical drought disaster in the Huai river basin from 1962 to 2016 were analyzed based on Standardized Precipitation Evapotranspiration Index(SPEI), Empirical Orthogonal Function and Mann-Kendall method. In this study drought evolution were analyzed and revealed the impact of agricultural production in the Huai river basin. The results showed that:(1) The correlation between the number of droughts and drought-affected area at the 0.05 significance level, indicating that the SPEI has an excellent suitability in the Huai river basin.(2) The drought time was significantly different and drought frequency was obvious fluctuation in the Huai river basin. The most of severe drought and extreme drought is the largest in 1960 s(24.8%), followed by 2010 s(15.8%) and lowest in 1980 s(10.0%).(3) The spatial distribution of drought has much difference. The drought severity was change between 27.76% and 36.04% in the Huai river basin. The drought severity in the northwest and southeast is lower than that in the southwest, northeast and central regions.(4) The results showed that trend of regional drought had a tendency towards drought conditions, which was the decreasing from the middle to the surroundings in the Huai river basin. The principal modes of our results indicated obvious variation and consistent.
【Fund】: 国家自然科学基金项目(41601023);; 国家杰出青年科学基金项目(51425903);; 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放基金(IWHR-SKL-201720);; 安徽省自然科学基金(1808085QD117)
【CateGory Index】: P426.616
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