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RSS FeedsRemote Sensing, Vol. 12, Pages 1155: Limitations in Validating Derived Soil Water Content from Thermal/Optical Measurements Using the Simplified Triangle Method (Remote Sensing)

 
 

4 april 2020 15:00:24

 
Remote Sensing, Vol. 12, Pages 1155: Limitations in Validating Derived Soil Water Content from Thermal/Optical Measurements Using the Simplified Triangle Method (Remote Sensing)
 


We assess the validity of the surface moisture availability parameter (Mo) derived from satellite-based optical/thermal measurements using the simplified triangle method. First, we show that Mo values obtained from the simplified triangle method agree closely with those generated from a soil/vegetation/atmosphere/transfer (SVAT) model for scenes over a field site at the Allahabad district, India. Next, we compared Mo values from the simplified triangle method for these same overpass scenes with surface soil water content measured at depths of 5 and 15 cm at this field site. Although a very weak correlation exists between remotely sensed values of Mo for the full scenes and measured soil water content measured at both depths, correlations increasingly improve for the 5 cm samples (but not for the 15 cm samples) as pixels were limited to increasingly smaller vegetation fractions. We conclude that the simplified triangle method would yield reasonable values of Mo and demonstrate good agreement with ground measurements, provided that validation is limited to pixels with little or no vegetation and to soil depths of 5 cm or less.


 
78 viewsCategory: Geology, Physics
 
Remote Sensing, Vol. 12, Pages 1156: ASTER Global Digital Elevation Model (GDEM) and ASTER Global Water Body Dataset (ASTWBD) (Remote Sensing)
Remote Sensing, Vol. 12, Pages 1165: Case Study of a Retrieval Method of 3D Proxy Reflectivity from FY-4A Lightning Data and Its Impact on the Assimilation and Forecasting for Severe Rainfall Storms (Remote Sensing)
 
 
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