Estimation of soil hydraulic properties with microwave techniquesUseful quantitative information about soil properties may be obtained by calibrating energy and moisture balance models with remotely sensed data. A soil physics model solves heat and moisture flux equations in the soil profile and is driven by the surface energy balance. Model generated surface temperature and soil moisture and temperature profiles are then used in a microwave emission model to predict the soil brightness temperature. The model hydraulic parameters are varied until the predicted temperatures agree with the remotely sensed values. This method is used to estimate values for saturated hydraulic conductivity, saturated matrix potential, and a soil texture parameter. The conductivity agreed well with a value measured with an infiltration ring and the other parameters agreed with values in the literature.
Document ID
19860048843
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Oneill, P. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gurney, R. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Camillo, P. J. (SAR, Inc. Riverdale, MD, United States)