[1]Liang Shouzhen,Wang Meng,Han Dongrui,et al.Analysis of Relationship Between Temperature Vegetation Dryness Index and Soil Moisture at Multiple Temporal Scales and Drought Monitoring[J].Research of Soil and Water Conservation,2024,31(02):149-157.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 02
Page number:
149-157
Column:
Public date:
2024-03-20
- Title:
-
Analysis of Relationship Between Temperature Vegetation Dryness Index and Soil Moisture at Multiple Temporal Scales and Drought Monitoring
- Author(s):
-
Liang Shouzhen, Wang Meng, Han Dongrui, Wang Fei, Wang Guoliang, Sui Xueyan
-
(Shandong Academy of Agricultural Sciences, Jinan 250100, China)
-
- Keywords:
-
vegetation index; land surface temperature; drought; temporal scales
- CLC:
-
TP79; S152.7
- DOI:
-
-
- Abstract:
-
[Objective] The aim of this study is to explore relations between different temporal scales TVDI and soil moisture and determine the best temporal scale inversing soil moisture. It is important to accurately acquire the soil moisture information for the monitoring and the response to drought disaster. [Methods] There are many methods to monitor drought using remotely sensed data. An index in combination with land surface temperature and vegetation index is frequently utilized. In this research, the remotely sensed data including reflectance and land surface temperature on three temporal scales(8-day, 16-day, monthly)were used to calculate temperature vegetation dryness index(TVDI), to analyze relationships between TVDI and soil moisture, and to determine the preferential temporal scale to monitor soil moisture. [Results] The vegetation index was linearly related to max and min land surface temperature at three temporal scales. At different temporal scales, there was a significant relationship between TVDI and soil moisture. However, 8-day TVDI demonstrated a closer relationship with soil moisture and with increasing temporal scales, the relationship between them became weak. In Shandong Province, the drought distribution was in accordance with precipitation. [Conclusion] It is suggested that TVDI can indicate soil moisture and should be used preferentially at the short temporal scale, and precipitation has important influence on wheat drought in Shandong Province.