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Marsh wetland reed aboveground biomass estimation method

A biomass and reed technology is applied in the field of reed above-ground biomass in swamp wetlands under the prediction of future climate change, which can solve the problems of long period, future biomass prediction, and inability to quickly and accurately estimate regional reed biomass.

Pending Publication Date: 2020-10-23
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the field measurement of the reed aboveground biomass in the existing swamp wetland has a large workload, a long cycle, and high cost, and it is impossible to quickly and accurately estimate the regional reed biomass and predict the future biomass. A method for estimating the aboveground biomass of Phragmites reed in a marsh

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  • Marsh wetland reed aboveground biomass estimation method
  • Marsh wetland reed aboveground biomass estimation method
  • Marsh wetland reed aboveground biomass estimation method

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specific Embodiment approach 1

[0029] Specific implementation mode 1: In this implementation mode, a method for estimating aboveground biomass of reeds in swampy wetlands is as follows:

[0030] 1. Acquire the medium-resolution imaging spectrometer normalized difference vegetation index data set covering the research area, the surface meteorological observation data set, and the measured aboveground biomass data of reeds in the swamp wetland, and preprocess the data;

[0031] 2. Using the ordinary Kriging interpolation method to interpolate the surface meteorological observation data to obtain a data set of the spatial distribution of the numerical values ​​of each meteorological element in the long-term sequence within the research period;

[0032] 3. Resampling the spatial distribution data sets of the long-term series meteorological elements with the same resolution as the vegetation index data, and unifying them into the same projection and coordinate system as the vegetation index data set;

[0033] 4....

specific Embodiment approach 2

[0045] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the data preprocessing method described in step one is as follows:

[0046] 1. Atmospheric correction, radiation correction, and geometric correction are performed on the vegetation index dataset;

[0047] 2. Calculate the average value of the repeated sample plot values ​​of reed aboveground biomass at each sampling point, and use the average value of reed aboveground biomass of all sample plots corresponding to each sampling point to represent the aboveground biomass value of reed at the sampling point. Others are the same as the first embodiment.

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Abstract

The invention discloses a marsh wetland reed aboveground biomass estimation method, and relates to a marsh wetland vegetation aboveground biomass estimation method. In order to solve the technical problems that existing marsh wetland reed aboveground biomass field measurement is large in workload, long in period and high in cost, and biomass cannot be rapidly and accurately estimated and predicted, the method comprises the steps of obtaining normalized vegetation index data, earth surface observation meteorological data and actually-measured marsh wetland reed aboveground biomass data and preprocessing same; interpolating the surface observation meteorological data to obtain a numerical spatial distribution data set of each meteorological element; resampling the numerical spatial distribution data set of each meteorological element, and unifying projection coordinates; obtaining an annual vegetation index maximum value data set by using a maximum value synthesis method; extracting annual vegetation index maximum values and meteorological element values corresponding to the biomass sampling points; and establishing a biomass simulation and prediction model. The method can accuratelyestimate and predict the aboveground biomass of the marsh wetland reed, and is small in workload, short in period and low in cost.

Description

technical field [0001] The invention relates to a method for estimating aboveground biomass of marsh wetlands, in particular to a method for estimating the aboveground biomass of reeds in regional marsh wetlands based on remote sensing data, and predicting the aboveground biomass of reeds in swampy wetlands under future climate change through meteorological data. Background technique [0002] As one of the important natural ecosystems, wetlands play an important role in protecting the ecological environment, maintaining biodiversity, and serving the sustainable development of society and economy. As an important type of wetland, swamp wetland can not only promote water storage and purification, regulate regional climate, but also provide habitat for wild animal breeding. Reed is one of the main vegetation types in swamp wetland ecosystem. In addition to the ecological functions shared by swamp wetland plants, reed also has high economic value, and its wide range of uses can ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F111/10
CPCG06F30/20G06F2111/10
Inventor 神祥金姜明吕宪国安雨刘波郝明旭张振卿
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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