Method for remote sensing and estimating woodland soil organic carbon

Abstract

The invention provides a method for remote sensing and estimating woodland soil organic carbon. As image elements of a remote sensing image of a woodland vegetation-covered area are manifested to be the spectral signature of vegetation, and a remote sensing image vegetation index NDVI is the vegetation index which is applied most widely at present, is most applicable, and can be widely applied to the estimation study of the primary productivity of the vegetation. For this, according to the method, by means of a CASA ecological process model, when the NDVI remote sensing data utilizing the high-resolution remote sensing image for reflecting regional difference are applied to a traditional soil organic carbon estimating model, model parameters with the spatial heterogeneity are simplified into constants, the defect of lowering the estimation precision is overcome, a relation model of the soil organic carbon storage amount and soil foundation breathing is set up according to the soil foundation breathing coefficient having the close relation with the soil organic carbon storage amount, and the remote sensing and estimating study of the woodland soil organic carbon can be achieved.

Description

technical field [0001] The invention belongs to forest land soil estimation technology, in particular to a method for remote sensing estimation of forest land soil organic carbon. Background technique [0002] Since the study of soil organic carbon in the 1950s, the estimation methods of soil organic carbon have been continuously improved, upgraded and perfected. There are mainly four types: vegetation type method, soil type method, life zone method, and model method. Among them, the soil type method requires complete and relatively complete soil physical and chemical property data (including soil layer thickness, etc.) and distribution map, which is difficult to achieve in practice, and is affected by factors such as the inconsistency of soil classification systems in different countries. The estimates vary widely. Under the influence of the diversified development and rapid changes of human development on social development, the estimation results of the life zone method ...

AI Technical Summary

Problems solved by technology

However, due to the rich forest cover on the forest land, the physical and chemical properties of the soil under the vegetation canopy (such as soil organic carbon, organic matter, nutrient content, and drainage type) cannot be directly observed and calculated using satellite or aerial image data

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