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针对2013年湖南省夏季旱灾,基于MODIS时序数据,采用温度植被旱情指数监测分析了2013年6-10月间湖南省旱情发展的时空格局与过程,及其对农业生产的影响。结果表明:(1)2013年6-10月湖南省发生了大面积的农业干旱灾害,其中,6-8月旱情持续加重;9-10月旱情得到缓解;(2)2013年6月重旱区呈带状分布于湘西北、湘中地区,7月向东发展,8月又大幅转移至西部,9-10月逐步向东南方撤退至衡阳及其以南区域;(3)6-10月是湖南省早、中、晚稻生长发育的关键时期,2013年的严重干旱导致该时段的水稻减产。
Aiming at the summer drought in Hunan Province in 2013, based on the MODIS time series data, the temporal and spatial patterns and processes of drought development in Hunan Province from June to October in 2013 were analyzed by using the monitoring data of temperature and vegetation drought index, and their impacts on agricultural production. The results showed that: (1) Large-scale agricultural droughts occurred in Hunan Province from June to October in 2013, of which drought conditions continued to increase from June to August; drought conditions from September to October were eased; (2) severe drought in June 2013 The zone was zonal distributed in northwestern Hunan and central Hunan, developed eastwards in July and moved to the west in August. Gradually southeast retreated to Hengyang and its south from September to October. (3) 6-10 The month is the critical period for the growth of early, middle and late rice in Hunan Province. The severe drought in 2013 led to the reduction of rice production in this period.