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Remote sensing estimation method for weight of withered grass in non-growing season on desert grassland

A technology for desert grasslands and non-growing seasons, which is applied in the direction of weighing, calculation, and measuring devices. It can solve the problems of large influence of soil background and inaccurate weight of dry grass in non-growing seasons of desert grasslands, and achieve the effect of overcoming the low estimation accuracy

Inactive Publication Date: 2017-09-08
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0005] The specific technical problem to be solved by the present invention is how to solve the problem of inaccurate estimation of the weight of dead grass in the non-growing season of the desert grassland by NDTI index, and construct an estimate Remote sensing spectral index of dead grass weight in non-growing season of desert grassland, providing a remote sensing estimation method of dead grass weight in non-growing season of desert grassland

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  • Remote sensing estimation method for weight of withered grass in non-growing season on desert grassland
  • Remote sensing estimation method for weight of withered grass in non-growing season on desert grassland
  • Remote sensing estimation method for weight of withered grass in non-growing season on desert grassland

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Embodiment Construction

[0039] The specific implementation of the present invention will be further described below through an application case of a remote sensing method for estimating the weight of dead grass in the non-growing season of Sunit Desert Grassland.

[0040] The implementation of a remote sensing method for estimating the weight of dead grass in the non-growing season of desert grassland is carried out according to the following steps:

[0041] Step 1. Acquisition of land use data in Sunit desert steppe

[0042]Obtain the MCD12Q1 remote sensing image product of Sunid (Sunite Left Banner, Sunite Right Banner) desert grassland, use MRT software to convert the format and map projection of MCD12Q1 data, convert HDF format to TIFF format, and convert sinusoidal map projection to WGS / Albers map projection to generate the spatial distribution map of Sunit desert grassland;

[0043] Step 2. Selection of hay grass plots in the Sunit desert steppe

[0044] According to the spatial distribution ...

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Abstract

The invention relates to a remote sensing estimation method for weight of withered grass in a non-growing season on desert grassland. The remote sensing estimation method comprises the following steps: acquiring land utilization data in a study area; selecting a withered grass sample plot; determining the weight of the withered grass in the sample plot; calculating vegetation index of the sample plot; determining the best spectrum index for estimating the weight of the withered grass and a remote sensing model; calculating the best spectrum index of the study area in a to-be-estimated date; carrying out remote sensing estimation on the weight of the withered grass in the study area in the to-be-estimated date; and carrying out remote sensing dynamic estimation study on the weight of the withered grass in the non-growing season in the study area. The remote sensing estimation method provided by the invention has the advantages that the gap of estimation of the weight of the withered grass in the non-growing season on the desert grassland based on MODIS remote sensing data is made up, a new method is provided for timely and accurately estimating the weight of the withered grass in the non-growing season on the desert grassland in a large regional scale range, quick and accurate monitoring on the weight of global regional withered grass in the non-growing season on the desert grassland based on the MODIS remote sensing data is realized, and a scientific basis is provided for ecological research and sustainable use of the desert grassland.

Description

technical field [0001] The invention relates to a method for estimating the weight of hay on a desert grassland by remote sensing, in particular to a method for quickly and accurately estimating the pattern and dynamics of hay weight in a non-growing season of a desert grassland by using MODIS satellite remote sensing data. Background technique [0002] Dead grass is an important part of non-growing season vegetation in desert grasslands. Accurate estimation of dead grass weight is of great significance for the study of carbon storage in desert grassland ecosystems. Dynamics and simulation of dead grass weight in non-growing seasons of desert grasslands have always been a hot issue in terrestrial ecology. Hay weight is widely used in the practice and research of desert steppe vegetation productivity models, drought monitoring, fire early warning, and animal husbandry planning. [0003] The traditional method of obtaining the weight of hay in desert steppe is on-the-spot mea...

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Application Information

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IPC IPC(8): G06F19/00G01G17/00G01N21/3563
CPCG01G17/00G01N21/3563G16Z99/00
Inventor 任鸿瑞薛娟娟苏巧梅
Owner TAIYUAN UNIV OF TECH
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