Application of thermal infrared remote sensing in water management of humid and arid areas

摘要

Regional evapotranspiration can be estimated with the equilibrium surface temperature and surface reflectance, both of which can be measured with scanning radiometers from airplanes or satellites. In case of vegetation covered soils information about the availability of soil moisture in the root zone can be obtained with the vegetation itself. For bare soil conditions the surface temperature variation in space and time supplies information about evaporation losses and apparent surface thermal admittance.