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Retrieval method and retrieval device of chlorophyll a concentration of inland case II water

A chlorophyll and concentration technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of inapplicability of inversion and reduce the generality of inversion algorithm, so as to improve the generality of the method, reduce the limitation, and improve the smoothness and stability. Effect

Active Publication Date: 2014-08-13
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI +1
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Problems solved by technology

[0004] However, inland Class II waters will vary by region and / or time, so an inversion algorithm established for a specific time in a specific region is not suitable for inversion of other regions and different times in the same region water body, reducing the versatility of the inversion algorithm

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  • Retrieval method and retrieval device of chlorophyll a concentration of inland case II water
  • Retrieval method and retrieval device of chlorophyll a concentration of inland case II water

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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] see figure 1 , which shows a flow chart of a method for retrieving the concentration of chlorophyll a in an inland second-class water body provided by an embodiment of the present invention, which may include the following steps:

[0046]101: Obtain the actually measured first remote sensing reflectance spectrum of the second-class inland water body.

[0047] In the embodiment of the present invention, the first remote sensing reflectance spectrum is m...

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Abstract

The invention provides a retrieval method and a retrieval device of chlorophyll a concentration of inland case II water, wherein the retrieval method of the chlorophyll a concentration of the inland case II water comprises the steps of firstly, classifying first remote sensing reflectance spectra to obtain a plurality of second remote sensing reflectance spectra taking different components as main components; calculating the weight matrixes of all the second remote sensing reflectance spectra, selecting all characteristic wave bands and calculating the chlorophyll spectral indexes; finally, carrying out weight fusion on the chlorophyll spectral indexes under all categories of all the spectra by weight to obtain weighted chlorophyll index, and fitting an inversion model to obtain the chlorophyll a concentration. Due to the method of firstly classifying and then carrying out weighted inversion, the limitation on the retrieval method caused by the area and the time can be reduced, and the smoothness and the stability of inversion results can be improved, and therefore, when the chlorophyll a concentration of a certain second remote sensing reflectance spectrum is inversed subsequently, the chlorophyll a concentration can be obtained by inversion through the inversion model corresponding to the second remote sensing reflectance spectrum, so that the universality of the method is improved.

Description

technical field [0001] The invention relates to the technical field of inversion of water quality parameters of second-class inland water bodies, in particular to a method and device for inversion of chlorophyll-a concentration of second-class inland water bodies. Background technique [0002] Chlorophyll a, suspended matter and colored soluble organic matter (also known as yellow matter) are the main components of inland second-class water bodies that can be monitored by remote sensing at present, and chlorophyll a, as the most important pigment for photosynthesis, is an indicator of phytoplankton biomass When the concentration of chlorophyll a is high, algae blooms often occur and the water quality deteriorates. Therefore, it is necessary to monitor the concentration of chlorophyll a in the second-class inland water body in real time. [0003] At present, a common method for real-time monitoring of chlorophyll-a concentration in inland second-class water bodies is to use t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
Inventor 张兵朱利张方方李俊生申茜吴艳红
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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