基于MODIS数据的东乌珠穆沁旗旱情监测研究

发布时间：2018-09-18 11:46

【摘要】：为研究植被供水指数和温度植被干旱指数在锡林郭勒草原旱情监测中的应用。采用分层采样方法进行土壤含水率野外数据获取,利用温度植被干旱指数(TVDI)和植被供水指数(VSWI)对2014年9月东乌珠穆沁旗土壤含水率进行监测分析,并进行了验证。利用MODIS产品地表温度日数据(MOD11A1)和归一化植被指数数据(MOD13A2),构建TS-NDVI特征空间反演TVDI和植被供水指数。结果表明:TVDI在0~10,0~20,0~30cm土层含水率监测平均误差分别为17.09%、16.17%、18.66%,较VSWI在3个土层含水率监测误差(38.62%、29.82%、23.52%)的监测精度更高。说明对东乌珠穆沁旗这种植被变化较大的草原区域而言,温度植被干旱指数能更好的反演其土壤含水率状况,对牧区的生产及科学的应对干旱具有一定的指导意义。
[Abstract]:In order to study the application of vegetation water supply index and temperature vegetation drought index in drought monitoring of Xilinguole grassland. The field data of soil moisture content were obtained by stratified sampling method. The soil moisture content of East Wuzhimuqin Banner in September 2014 was monitored and analyzed by using (TVDI) and (VSWI). Based on the daily surface temperature data (MOD11A1) and normalized vegetation index (MOD13A2) of MODIS products, the TS-NDVI feature space is constructed to retrieve TVDI and vegetation water supply index. The results showed that the average monitoring error of water content in the soil layer of 0 ~ 10 ~ 10 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ 0 ~ (30) was 17.09 ~ 16.17 ~ 18.66, which was higher than that of VSWI in three soil layers (38.62 ~ 29.82% ~ 23.52%). It shows that the temperature vegetation drought index can better invert the soil moisture content in the steppe area of East Wuzhimuqin Banner which has a certain guiding significance for the production of pastoral area and the scientific response to drought.
【作者单位】：内蒙古农业大学水利与土木建筑工程学院;塔里木大学水利与建筑工程学院;水利部牧区水利科学研究所;
【基金】：内蒙古自治区科技计划项目(20140153) 内蒙古自治区自然科学基金项目(2015MS0513) 内蒙古自治区第五批“草原英才”工程项目(〔2015〕56) 内蒙古自治区水利科技项目(NSK201403)
【分类号】：S812.1

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