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- Title
Landsat/MODIS Fusion for Soil Moisture Estimation Over a Heterogeneous Area in Northern Jordan.
- Authors
Almagbile, Ali; Hazeymeh, Khaled; Mosleh, Mostafa; Al-Rawabdeh, Abdulla; Aldayafleh, Omar; Zeitoun, Mohammad; Maslamani, Amer
- Abstract
Fusion models have been developed to improve the spatial and temporal resolution simultaneously because remote sensing data cannot guarantee the high resolution of vegetation and temperature products. In this study, Moderate Resolution Imaging Spectroradiometer (MODIS) and Land Remote Sensing Satellite (Landsat) data were fused using the STI-FM fusion model for retrieving soil moisture index (SMI) based on the NDVI-LST triangulation/trapezoidal shape. The study was conducted from November 2019 to May 2020 and covered a heterogeneous area in Northern Jordan. For validation, the soil moisture index results were then compared with the observed in-situ soil moisture measurements at 16 sites distributed throughout the study area. To determine the spatial and temporal variability/stability of SMI and observed soil moisture, statistical and geostatistical approaches were employed. The results revealed that the relationship between SMI and in-situ measurements was high in the wet winter months and low during the warm summer months. The determination coefficient r2 of 0.66 and RMSE of 0.10 were found in January while in May, the r2 and RMSE were 0.35 and 0.32, respectively. The results of the semivariogram analysis showed that the observed soil moisture was more varied during the wet periods when compared with the drier period, whereas the SMI was not influenced by seasonal variations. The results indicated that high values of SMI can be obtained with low temperature and rich vegetation, while the higher temperature and water-stressed vegetation revealed low SMI values.
- Subjects
SOIL moisture; REMOTE sensing; SPECTRORADIOMETER; GEOLOGICAL statistics; LAND surface temperature
- Publication
Jordan Journal of Earth & Environmental Sciences, 2022, Vol 13, Issue 4, p247
- ISSN
1995-6681
- Publication type
Article