温度植被干旱指数在旱情监测中的应用  

Application of Temperature Vegetation Drought Index in Drought Monitoring

作　　者：裘琳[1] 李逵[1] 颜春燕[2] 

机构地区：[1]安徽省地质测绘技术院,安徽合肥230022 [2]中国地质大学(北京),北京100083

出　　处：《地矿测绘》2016年第3期1-4,共4页Surveying and Mapping of Geology and Mineral Resources

摘　　要：利用MODIS 8 d合成产品数据MOD11A2和16 d合成产品数据MOD13A2获取的归一化植被指数(NDVI)和陆地表面温度(Ts)构建NDVI-Ts特征空间,以该特征空间计算的温度植被干旱指数(TVDI)作为干旱监测的指标,反演西藏2006年、2005年、2004年3、4、5、6四个月每16 d的干旱变化状况。利用计算的TVDI值对西藏进行干旱等级的划分,并通过不同年份不同月份TVDI值的对比得到同一年份不同区域、同一年份不同月份以及不同年份西藏的干旱变化。以此为依据采取更有效的抗旱政策指导西藏进行合理的生产,促进经济社会的可持续发展。文章主要采用了线段比值法计算TVDI值,研究结果表明,利用线段比值法计算的TVDI值作为干旱监测的指标是可行的。8 -day composite MODIS temperature product M0D11A2 and 16-day composite MODIS NDVI product MOD13A2 were combined to construct NDVI-Ts space from which the TVDI （Temperature Vegetation Drought Index） was obtained. Every 16-day drought situation in March, April,May and June 2006,2005 and 2004 in Tibet was retrieved by u-sing the TVDI. Tibet was separated into different drought level by using the TVDI. And the drought variational situation of Tibet in different months and years were obtained. On the basic of the results,the administration can adopt the policy of drought resistance to guide the production in Tibet,and promote the sustainable development of economic society. In this paper,the line segment ratio method is mainly adopted. The results of the research suggest that it is feasible to take TVDI calculated by using line segment ratio method as the index of drought monitoring.

关 键 词：归一化植被指数 温度植被干旱指数 温度植被指数空间 干旱监测 线段比值法 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]