Jiangxi Province is a big agricultural province, and the drought disaster often appear because of the global climate change in recent years. In order to obtain drought real-time variation situation of Jiangxi Province, the MODIS 16 days remote sensing data was used to calculate the crop water supply index with the well-practiced model of vegetation water supply index for macroscopically getting the knowledge about the Jiangxi provincial spring drought status quo in 2011. The result showed that the index can reveal the actual drought situation, it can be another drought index except the soil moisture index.%江西省是农业大省,近几年受气候变化影响,干旱灾害频发,为从宏观上获取江西省旱情实时变化情况.利用中低分辨率MODIS16 d合成遥感数据,采用较为成熟的植被供水指数法,计算江西省农作物供水指数,对2011年江西省全省春季旱情进行监测.结果显示,该指数能较好地反映实地旱情的现状,可以作为除土壤水分指数之外的另外一种干旱等级显示指标.
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