[1]LI Yongliu,ZHOU Zhongfa,JIANG Yi.Retrieval of Soil Moisture in the Zone of Qianzhong Water Diversion Project Based on Landsat 8 Image Data[J].Research of Soil and Water Conservation,2020,27(04):78-84.
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Retrieval of Soil Moisture in the Zone of Qianzhong Water Diversion Project Based on Landsat 8 Image Data
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 04
Page number:
78-84
Column:
目次
Public date:
2020-06-20
- Title:
- Retrieval of Soil Moisture in the Zone of Qianzhong Water Diversion Project Based on Landsat 8 Image Data
- Keywords:
- soil moisture; LST; NDVI; Qianzhong Water Diversion Project
- CLC:
- S152.7; TP79
- DOI:
- -
- Abstract:
- In order to obtain the changes of soil moisture in the zone of Qianzhong Water Diversion Project area, based on Landsat 8 surface temperature data(LST)and vegetation index data(NDVI)from 2013 to 2018, the inversion analysis on the soil moisture contents in different years in the Qianzhong Water Diversion Project area was carried out based on the vegetation water supply index(VSWI), and the accuracy of inversion was verified with measured soil moisture data, the space-time heterogeneity of soil moisture distribution and the main influencing factors in the study area were discussed. The results showed that:(1)correlation between soil moisture resulted from Landsat 8 data inversion and the measured soil moisture was significant, suggesting that Landsat 8 data is suitable for soil moisture inversion in the study area;(2)the soil moisture content in the study area showed the tendency of fluctuating increase in the period from 2013 to 2018, the average annual growth rate was 0.91%, showing the trend of high soil moisture in the southwest and the lower soil moisture in the northeast in terms of the spatial distribution;(3)the types of average soil water contents in the study area had changed significantly in the last six years, the area with the change of soil water content mainly increased;(4)in the period 2013—2018, the soil moisture in the study area was moderately negatively correlated with temperature, significantly positively correlated with rainfall in parts of Bijie area, and moderately positively correlated with rainfall in the rest of the regions. The soil moisture inversion of the study area can be realized by Landsat 8 data and VSWI, and the results can provide the reference for soil moisture monitoring in this area.
- References:
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Last Update:
2020-07-09