[1]WANG Juan,ZHANG You,ZHANG Jie,et al.Soil Moisture Inversion in Transitional Zone of Mountain Plain Based on Temperature Vegetation Drought Index Method—A Case Study of Mianzhu City[J].Research of Soil and Water Conservation,2018,25(02):151-156,161.
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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[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 02
Page number:
151-156,161
Column:
Public date:
2018-04-03
- Title:
- Soil Moisture Inversion in Transitional Zone of Mountain Plain Based on Temperature Vegetation Drought Index Method—A Case Study of Mianzhu City
- Keywords:
- temperature vegetation drought index; soil moisture retrieval; mountain plain transition zone; remote sensing and GIS
- CLC:
- S152.7
- DOI:
- -
- Abstract:
- 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.
- References:
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