干旱地区农业研究Issue(4)：227-232,6.DOI:10.7606/j.issn.1000-7601.2015.04.34
基于 TVDI 指数的冬小麦旱情动态研究--以河北省邢台市为例
Investigation on dynamic changes of drought of winter wheat by TVDI index-Taking the Xingtai in Hebei province as an example
摘要
Abstract
Temperature Vegetation Dryness Index (TVDI )is an effective method for monitoring the dynamic changes of drought ,and based on land surface soil moisture retrieval from optical and thermal-infrared remote sensing data .In 2010 ,TTVDI was calculated by Normalized Differential Vegetation Index (NVDI ) and Land Surface Temperature (LST ) data ,that were derived from the MODIS data of winter wheat growing period in Xingtai county .We used TVDI for evalu-ate severe drought ,and obtained a consistent result in comparison with the data of precipitation and soil moisture .The result showed that the deductive temperature of ground surface could be used as the actual value ,considering the average error was 0 .295℃ by a comparison between measured temperature and temperature retrieval from MOD 11A2 data .There was a superior linear fitness between local TVDI value and relative humidity in 0~20 cm layer ,with the maximal and minimal R2 were 0 .722 of Qinghe and 0 .598 of Renxia .These results suggest that TVDI can effectively reflect the actual drought in Xingtai county .关键词
干旱监测/归一化植被指数/地表温度/温度植被干旱指数/邢台市Key words
drought monitoring/NDVI/LST/TVDI/Xingtai Country分类
农业科技引用本文复制引用
刘公英,申海凤,胡佳,史晓瑞,商彦蕊..基于 TVDI 指数的冬小麦旱情动态研究--以河北省邢台市为例[J].干旱地区农业研究,2015,(4):227-232,6.基金项目
国家自然科学基金项目“区域农业旱灾适应性评价模型与风险防范模式研究” （）
