Remote sensing model method for regional vegetation transpiration and soil evaporation inversion based on thermal infrared remote sensing

Abstract

The invention discloses a remote sensing model method for regional vegetation transpiration and soil evaporation inversion based on thermal infrared remote sensing. The remote sensing model method comprises the steps of 1, collecting and spatializing meteorological radiation data of a research area; 2, acquiring optical and thermal infrared remote sensing data; 3, preprocessing the optical remotesensing data; 4, conducting thermal infrared remote sensing data preprocessing and surface temperature inversion; 5, carrying out inversion calculation of surface biophysical parameters; 6, performingnight surface temperature downscaling calculation; 7, calculating the surface flux based on a single-layer remote sensing evapotranspiration model with a physical mechanism; 8, carrying out sensitiveheat flux cutting calculation based on a double-temperature-difference model; 9, calculating latent heat flux of vegetation and soil components; and 10, performing daily expansion calculation of vegetation transpiration and soil evaporation. According to the method, the problems of high difficulty and uncertainty of regional vegetation transpiration and soil evaporation inversion based on the surface temperature at present are solved.

Description

technical field [0001] The invention belongs to the fields of water conservancy engineering, agricultural technology and ecological environment, and specifically relates to a remote sensing model method based on thermal infrared remote sensing for regional vegetation transpiration and soil evaporation inversion, and in particular proposes an evapotranspiration combining a single-layer model and a double-temperature difference model The cutting method can serve the application fields of crop water consumption estimation in agricultural irrigation areas, planning and management of regional water resources, evaluation of crop water use efficiency, and regional drought monitoring. Background technique [0002] Evapotranspiration, including soil evaporation and vegetation transpiration, is an important process of water and energy exchange in the atmosphere, hydrosphere and biosphere, and is closely related to the cycle of water, energy and carbon on the earth. As a key component ...

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Problems solved by technology

[0005] Aiming at the difficulties and uncertainties existing in the inversion of regional vegetation transpiration and soil evaporation based on surface temperature, the

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