【摘要】 为了更有效地监测安徽省农业干旱,以安徽省半湿润区、过渡区为研究对象,利用MODIS资料,在对比分析了基于植被供水指数和温度植被干旱指数两种干旱监测方法基础上,结合已业务应用的农业干旱指标累积湿润指数,开展安徽省分时段的晴空遥感干旱监测研究,建立并确定了部分时段半湿润区、过渡区的MODIS植被供水指数和温度植被干旱等级标准,同时结合当地台站监测土壤墒情对干旱监测进行检验。结果表明,作物生长季节VSWI、TVDI与累积湿润指数存在相关性,两种方法建立指标和模型可以用来分时段进行区域干旱监测,得出了初夏旱TVDI更适合于研究区域的干旱监测。更多还原

【Abstract】 In this paper,two drought monitoring methods of temperature vegetation dryness index(TVDI) and vegetation supply water index(VSWI) based on temperature/vegetation supply water index(NDVI) were contrasted and analyzed by MODIS data in semi-humid and transitional zones in Anhui Province.The grades of TDVI and VSWI about drought monitoring combining accumulated humidity index were established, which were validated by local soil moisture.TVDI and VSWI and accumulated humidity index have been shown a remarkable correlation,and the TVDI drought monitoring method is more suitable than VSWI in researching area.更多还原