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Method for remote sensing estimation of weight ratio of green plants to withered plants of grassland

A technology for green plants and withered plants, which is applied in the field of remote sensing to estimate the weight ratio of green plants and withered plants in grasslands. It can solve the problems that the weight ratio of green plants and withered plants in grasslands cannot be accurately estimated, and the weight ratio of withered plants in grasslands is not ideal.

Active Publication Date: 2016-11-09
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, the STI index is not ideal for estimating the proportion of dead plant weight in grasslands.
Further studies have shown that the STI index cannot accurately estimate the weight ratio of green plants to withered plants in grasslands

Method used

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  • Method for remote sensing estimation of weight ratio of green plants to withered plants of grassland
  • Method for remote sensing estimation of weight ratio of green plants to withered plants of grassland
  • Method for remote sensing estimation of weight ratio of green plants to withered plants of grassland

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Embodiment Construction

[0030] A remote sensing method for estimating the weight ratio of green plants and withered plants in grassland is implemented, and the method is carried out according to the following steps.

[0031] 1) Acquisition of grassland spatial distribution data in the study area. Obtain the land cover remote sensing image product MCD12Q1 of the study area, convert the data format and map projection, and generate the grassland spatial distribution map of the study area.

[0032] 2) Location of ground sampling points. According to the spatial distribution map of the grassland in the study area obtained in the above step 1), select n sampling points with uniform spatial distribution of grassland vegetation, and record the latitude and longitude coordinates of the four corners of the sampling points.

[0033] 3) Determination of the weight ratio of green plants and withered plants at the sampling point. Each sampling point was divided into n grids of 10 m × 10 m, and each grid was furt...

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Abstract

A method for remote sensing estimation of a weight ratio of green plants to withered plants of grassland comprises the following steps: acquiring grassland space distribution data of a research area; positioning ground sampling points; determining the weight ratio of green plants to withered plants at every sampling point; determining a spectral index for estimating the green plants to withered plants; determining a model for remote sensing estimation of the weight ratio of green plants to withered plants of the research area; calculating the spectral index to be estimated of the research area; carrying out remote sensing estimation on the weight ratio of green plants to withered plants, with the date to be estimated, of the research area; and carrying out dynamic remote sensing estimation researches on the weight ratio of green plants to withered plants of the grassland in the research area. The method allows a spectral waveband sensitive to the green plants and withered plants to be found through a remote sensing technology, constructs the spectral index for estimating the weight ratio of green plants to withered plants, realizes remote sensing estimation of a weight ratio of green plants to withered plants of the grassland, and provides technical support for ecologic researches and development strategy of the grassland.

Description

technical field [0001] The invention relates to a method for estimating the weight ratio of grassland green plants and withered plants by remote sensing, in particular to a method for quickly and accurately estimating the weight ratio pattern and dynamics of grassland green plants and withered plants by using satellite remote sensing data. Background technique [0002] The weight ratio of green plants to withered plants is an important structural parameter of a grassland ecosystem, the most direct indicator reflecting the growth status of grassland vegetation, and plays a decisive role in the structure, function and process of a grassland ecosystem. The weight ratio of green plants to withered plants is widely used in the practice and research of grassland vegetation growth dynamic monitoring, grassland fire warning, grassland drought monitoring, grassland growth force model, and animal husbandry planning. Rapid assessment of the weight ratio of green plants and withered pla...

Claims

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Application Information

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IPC IPC(8): G01N21/25G01N21/3563G01G19/64
CPCG01G19/64G01N21/25G01N21/3563G01N2021/8466
Inventor 任鸿瑞闫美芳苏巧梅
Owner TAIYUAN UNIV OF TECH
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