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Method for indirect remote-sensing monitoring of water quality of macrophytic regions of macrophytic lakes

A technology for aquatic plants and water quality, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems that affect the acquisition of water spectrum by satellite sensors, hinder the inversion of water quality parameters in areas where aquatic plants grow, etc.

Inactive Publication Date: 2017-02-22
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

The existence of aquatic plants in grass-type lakes will seriously affect the satellite sensor's acquisition of water body spectra, hindering the inversion of water quality parameters in areas where aquatic plants grow. Most areas of grass-type lakes are distributed with aquatic plants, so it is difficult to directly monitor the water quality of aquatic grass areas in grass-type lakes.

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  • Method for indirect remote-sensing monitoring of water quality of macrophytic regions of macrophytic lakes
  • Method for indirect remote-sensing monitoring of water quality of macrophytic regions of macrophytic lakes
  • Method for indirect remote-sensing monitoring of water quality of macrophytic regions of macrophytic lakes

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Embodiment Construction

[0068] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0069] In this embodiment, Nansi Lake, a typical grass-shaped lake, is taken as an example for illustration.

[0070] Such as figure 1 As shown, the water quality remote sensing monitoring method of aquatic grass type lake described in the embodiment of the present invention comprises:

[0071] Step 101 of obtaining water quality parameters of the aquatic plant area of ​​Nansi Lake: conducting field experiments on the grass-shaped lake Nansi Lake to obtain water quality parameter data of the aquatic plant area of ​​Nansi Lake;

[0072] Image preprocessing step 102: Obtain hyperspectral data of environmental small satellites covering the Nansihu area, Gaofen-1 remote sensing images and multi-temporal MODIS NDVI products, and preprocess the images.

[00...

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Abstract

The invention relates to the field of remote-sensing monitoring of water quality, in particular to a method for remote-sensing monitoring of water quality of macrophytic regions of macrophytic lakes. The method has the advantages that types and phonological characteristics of macrophytes are acquired through acquisition of a normalized differential vegetation index curve of the macrophytes in a research area, the macrophytes in the research area are recognized by combination of mono-temporal hyperspectral and multispectral images, and the problem that a traditional remote-sensing means performs remote-sensing retrieval on the water quality of the macrophytic regions difficultly due to the hindrance effect of the macrophytes is solved with the help of indicative effect of the macrophytes on the water quality.

Description

technical field [0001] The present invention relates to the field of remote sensing monitoring of water quality, in particular to an indirect monitoring of water quality in aquatic grass areas of aquatic grass-type lakes based on the identification of aquatic plants based on the time spectrum curve of normalized vegetation index, hyperspectral index and normalized water body index, and the indication function of aquatic plants on water quality. method. Background technique [0002] Water is the source of life and an essential resource for human production and life. With the rapid development of economy and society, the demand for water resources continues to increase, coupled with the interference of human activities, the water environment continues to deteriorate. With the increasingly serious problem of water pollution, water quality monitoring has become a major problem that must be solved for the sustainable development of society and economy, especially for inland lake...

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Application Information

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IPC IPC(8): G01N21/552
CPCG01N21/552
Inventor 赵红莉冶运涛曹引蒋云钟纪刚易珍言杜军凯张海涛
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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