基于HJ-1A/1B卫星TVDI的干旱遥感监测研究——以鄱阳湖流域为例  

Study on drought monitoring based on HJ-1A/1B images ——a case of Poyang Lake watershed

作　　者：韩杏杏 陈晓玲[1,2] 秦超[1] 冯炼[1] 田礼乔[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉430079 [2]江西师范大学鄱阳湖湿地与流域研究教育部重点实验,南昌330022

出　　处：《华中师范大学学报（自然科学版）》2014年第2期274-278,共5页Journal of Central China Normal University：Natural Sciences

基　　金：国家863计划资助项目(2012AA12A304);国家自然科学基金重点项目(41331174);测绘遥感信息工程国家重点实验室开放基金重点项目(11)

摘　　要：针对鄱阳湖流域2011年春季出现的特大旱情,利用2011年3～6月HJ-1A /1B卫星CCD影像计算NDVI,结合同步HJ-1B卫星IRS数据计算的地表温度信息,构建NDVI-LST空间,获取了鄱阳湖流域温度植被干旱指数（Temperature Vegetation Dryness Index,TVDI）.利用同步观测的AMSR-E（Advanced Microwave Scanning Radiometer-EOS）表层土壤含水量数据对温度植被干旱指数结果进行可靠性验证.结果表明,TVDI和AMSR-E土壤含水量之间存在显著的负相关,相关系数达到-0.697（P＜0.05）,由HJ-1A/1B卫星影像计算得到TVDI可以有效表征鄱阳湖流域的土壤含水情况.用TVDI监测结果分析鄱阳湖流域2011年干旱,从空间分布来看,鄱阳湖流域受灾最严重的是环鄱阳湖区和修水流域.从时间分布来看,鄱阳湖流域3月底以轻旱为主,4月底流域南部旱情加重出现中度干旱,5月鄱阳湖流域将近80％的区域都受到不同程度干旱的影响.We calculates the temperature vegetation dryness index （TVDI） by using Normalized Difference Vegetation Index （NDVI） derived from the HJ-1A/1B CCD and Land Surface Temperature （LST） derived from the HJ-1B IRS form March to June,2011.The TVDI of the surface soil moisture products of AMSR-E was tested by using the Advanced Microwave Scanning Radiometer-EOS （AMSR-E） collected simultaneously.The results show that there is a significant negative correlation （with a correlation coefficient of-0.697） between TVDI and AMSR-E,indicating that the TVDI calculated based on the HJ-1A/1B can effectively reflect the containing water of Poyang Lake Watershed.The analysis on the spatial distribution of drought in 2011 by using TVDImeasured results shows that the most severely affected areas were the region around the Poyang Lake and Xiushui River basin,the Poyang Lake basin is dominated by moderate drought in late March,the drought of the South becomes more serious in late April,in May,almost 80％ of the areas in Poyang Lake basin areas are subject to the impact of drought of different degrees.

关 键 词：TVDI HJ卫星 鄱阳湖流域 干旱监测 AMSR-E 

分 类 号：P208[天文地球—地图制图学与地理信息工程]