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Position: Home > Articles > Soil Moisture Inversion in Transitional Zone of Mountain Plain Based on Temperature Vegetation Drought Index Method——A Case Study of Mianzhu City Research of Soil and Water Conservation 2018 (2) 151-156+161

基于TVDI的山地平原过渡带土壤水分反演——以绵竹市为例

作  者：
王娟;张优;张杰;彭文甫;张伟
单  位：
四川师范大学地理与资源科学学院;四川师范大学西南土地资源评价与监测教育部重点实验室
关键词：
温度植被干旱指数;土壤水分反演;山地平原过渡带;遥感与GIS
摘  要：
为了对生态脆弱的西部山地平原过渡带进行土壤水分监测研究。以绵竹市为例,利用Landsat8OLI/TIRS影像,获取了陆地表面温度(TS)和归一化植被指数(NDVI),通过温度植被干旱指数(TVDI)建立了土壤水分回归模型进行遥感水分反演,并通过野外采样数据对结果进行精度验证。结果表明:TVDI和土壤水分存在较强相关性(R=0.6553),能较好反映表层土壤湿度;土壤水分整体分布状况表现为西北山地地区高于东南平原地区,过渡带上山地向平原逐渐降低。因此,TVDI能较好反映过渡带土壤水分时空差异,对监测过渡带土壤干湿状况具有理论与现实意义。
译  名：
Soil Moisture Inversion in Transitional Zone of Mountain Plain Based on Temperature Vegetation Drought Index Method——A Case Study of Mianzhu City
作  者：
WANG Juan;ZHANG You;ZHANG Jie;PENG Wenfu;Zhangwei;Faculty of Geography and Resources Science,Sichuan Normal University;Key Lab of Land Resources Evaluation and Monitoring in Southwest,Ministry of Education,Sichuan Normal University;
关键词：
temperature vegetation drought index;;soil moisture retrieval;;mountain plain transition zone;;remote sensing and GIS
摘  要：
In order to study the soil moisture monitoring in west China,specifically the ecologically-fragile mountain-plain transition zones(MPTZs),Mianzhu City,which is located in an MPTZ,was selected as the study area.Landsat 8 OLI/TIRS images were used to obtain the surface temperatures(TS)and normalized difference vegetation index(NDVI).The temperature-vegetation drought index(TVDI)was established,which is a soil moisture regression model that serves as a monitoring index of soil moisture.The TVDI was used for remote sensing inversion of soil moisture,and the accuracy of the inversion results was verified through comparison with data acquired from field samples.The findings indicated that a strong correlation between the TVDI and soil moisture was significant(R=0.6553),which could better reflect moisture levels in the topsoil.The greater the TVDI value was,the drier the soil was,and vice versa.In terms of overall distribution,soil moisture levels were higher in the northwest mountainous areas and relatively lower in the southeastern plains.Correspondingly,soil moisture in the MPTZ gradually declined from the mountainous areas to the plains.The TVDI is able to better reflect the spatiotemporal variations of soil moisture in MPTZs and is of theoretical and practical significance for the monitoring of soil moisture conditions in this zone.

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