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Surface water heat flux remote sensing inversion-based drought monitoring method and system

A technology of remote sensing inversion and heat flux, applied to radio wave measurement systems, instruments, etc., can solve the problems of inapplicable complex surface features and the inability to realize automatic identification of dry and wet pixels

Inactive Publication Date: 2011-09-07
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

[0008] 1. It can only estimate the surface flux and evapotranspiration in a uniform and flat area, and is not suitable for complex surface characteristics;
[0009] 2. Manual confirmation of dry and wet pixels is required, and automatic identification of dry and wet pixels in the simulation area cannot be realized;
[0010] 3. Short-term surface energy and evapotranspiration estimation simulations can only be performed on small areas

Method used

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  • Surface water heat flux remote sensing inversion-based drought monitoring method and system
  • Surface water heat flux remote sensing inversion-based drought monitoring method and system
  • Surface water heat flux remote sensing inversion-based drought monitoring method and system

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Embodiment Construction

[0103] In order to make the purpose, technical solution and advantages of the present invention clearer, the drought monitoring method and system based on remote sensing inversion of surface water and heat flux of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0104] The drought monitoring method and system based on surface water and heat flux remote sensing inversion of the present invention is based on the principle of energy residual, referring to the relevant algorithms in the SEBAL, SEBS and S-SEBI models, and utilizing the spatial analysis function of GIS to establish a system based on Regional evapotranspiration remote sensing algorithm calibrated by digital elevation model (DEM) parameters. Use DEM (slope, aspect and altitude) to correct ...

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Abstract

The invention discloses a surface water heat flux remote sensing inversion-based drought monitoring method and system. The method comprises the following steps of: calculating surface net radiation flux based on remote sensing parameter inversion, calculating soil heat flux by using an iterative calculation method, calculating sensible heat flux according to the calculation of the surface flux, calculating regional water shortage indexes (RWSI), and monitoring the regional drought degree.

Description

technical field [0001] The invention relates to the technical field of ecosystem monitoring, in particular to a drought monitoring method and system based on remote sensing inversion of surface water and heat flux. Background technique [0002] Natural ecosystems and agricultural ecosystems in northern China are generally stressed by water conditions. With the advantages of rapid and macroscopic observation of remote sensing means, simulating and monitoring the surface water and heat fluxes of ecosystems at the regional scale is a scientific issue with theoretical significance and practical value. Remote sensing observations are the only possible means of providing estimates of regional surface water and heat fluxes. [0003] Evapotranspiration includes the evaporation of surface water and the transpiration of water in plants. It is part of the surface water heat flux, an important part of maintaining the balance of land surface water, and the main part of maintaining the ba...

Claims

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Application Information

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IPC IPC(8): G01S7/48
Inventor 高志强
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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