中文摘要：

MODIS-EVI植被指数与不同覆盖程度植被的线性关系已得到明显改善，可以更有效地反映地表植被的生长状态。利用MODIS合成数据MYD11A2和MYD13A2获取的增强型植被指数（EVI）和陆地表面温度（Ts）构建EVI-Ts特征空间，并以该特征空间计算的温度植被干旱指数（TVDI）作为干旱监测指标，分析广西2006年秋旱分布。结果表明：以地表温度和MODIS-EVI为基础的温度植被干旱指数能较好地反映区域旱情分布和旱情发展过程，2006年9月中旬-11月中旬广西受旱区域不断扩大，旱情持续加重。

英文摘要：

The MODIS Enhanced Vegetation Index （EVI） has obviously improved its linearity with vegetation in different cover, it is better to indicate the characteristics of vegetation cover. In this paper, the MODIS land surface temperature product（MYD11A2） and vegetation index （MYD13A2） product were used to establish EVI-Ts space. A simplified Temperature Vegetation Dryness Index （TVDI） from EVI -Ts space was presented to evaluate agriculture drought in Guangxi, located in southem China, from the middle tea days of September to the middle ten days of November in 2006. Based on the information of TVDI, the agricultural drought in Guangxi was analyzed. It was found that the TVDI from the EVI -Ts space can effectively indicate the spatial distribution and temporal evolution of drought, and the area of drought in Guangxi was evidently increasing during the middle ten days of September to the middle ten days of November in 2006.