Method for surveying submerged plant biomass by utilizing ground object reflectance spectrum curve

Abstract

A method for surveying submerged plant biomass by utilizing a ground object reflectance spectrum curve comprises steps as follows: 1), a water area is fenced, a water body of the researched water area is divided into a plurality of water area units, sequence numbers are marked in sequence, the ground object reflectivity of submerged plants in the plurality of water area units is measured by a ground object spectrometer, and meanwhile, the submerged plant biomass is obtained with a conventional submerged plant biomass surveying method; 2) after the ground object reflectivity of the submerged plants with different biomass is measured in the plurality of water area units of the water area required to be surveyed, the spectral characteristic spectrums of the submerged plants with different biomass are obtained, the marked sequence numbers in the step 1) are recorded, and a spectral characteristic spectrum base is established; and 3), future biomass of the submerged plants in the water area are obtained by measuring the ground object reflectivity of the submerged plants, comparing the spectral characteristic spectrum base and searching spectral characteristic spectrums of the submerged plants with different biomass.

Description

technical field [0001] The invention belongs to a method for investigating the biomass of submerged plants by using the reflection spectrum curve of surface objects, in particular, a method suitable for investigating the biomass of submerged plants in clear water. Background technique [0002] In the visible light and near-infrared bands (0.3-2.5 μm), the thermal radiation of the surface object itself is almost equal to zero. The spectrum emitted by ground objects is mainly reflected solar radiation. In addition to the different ground object reflection spectrum curves, the same type of ground object has different morphological performance under different internal structures and external conditions. Generally speaking, the reflectivity of ground objects changes with the wavelength to follow the law, thus providing a basis for the interpretation of remote sensing images. [0003] Submerged plants refer to aquatic plants whose plants are submerged in water and rooted in the ...

AI Technical Summary

Problems solved by technology

The diving digging method is more accurate, but expensive; the long-distance collection method is less expensive, but destructive

In summary, there is a lack of a cost-effective and less destructive survey method for the determination of submerged plant biomass

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