Eutrophication water reservoir surface layer water body algae distribution Landsat remote sensing monitoring method
A technology for eutrophication and remote sensing monitoring, which is applied in the direction of color/spectral characteristic measurement, instrument, character and pattern recognition, etc. It can solve the problems of long detection time and inability to identify the temporal and spatial distribution of algae, and achieve simple steps and operability Strong, monitoring effect is obvious
Inactive Publication Date: 2016-11-09
TONGJI UNIV
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Problems solved by technology
Algae monitoring in the traditional sense relies on field sampling, fixation, and microscope observation of water bodies, but this method takes a long time to detect and cannot identify the spatial and temporal distribution of algae
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Embodiment 1
[0024] Embodiment 1 (theoretical basis)
[0025] A Landsat remote sensing monitoring method for the distribution of algae in the surface water of a eutrophic reservoir, including: obtaining the algae biomass and its spatial distribution in the surface water through field survey sampling analysis; based on the spectral characteristics of the reservoir water and algae, using the planktonic algae index (FAI) The distribution of algae in the surface water of the reservoir was extracted, combined with the measured algae biomass in the surface water of the reservoir, a remote sensing monitoring method for the distribution of algae in the surface water of the reservoir was constructed. Based on this method, the monthly variation and spatial distribution characteristics of algae biomass in the surface water of eutrophic reservoirs can be accurately obtained.
[0026] The specific method includes the following steps:
[0027] (1) Determine the algae biomass in the surface water of eut...
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The present invention relates to an eutrophication water reservoir surface layer water body algae distribution Landsat remote sensing monitoring method. With the method, based on Landsat remote sensing data, the fitting model of the floating algae index and the measured algal biomass is combined, the decision tree of the algae bloom distribution is constructed, and the eutrophication water reservoir surface layer water body algae biomass and the temporal and spatial distribution characteristic are identified. According to the present invention, the steps are simple, the operability is strong, the water body surface layer algae distribution condition can be subjected to the large range monitoring, the algae information extraction is rapid and is not limited by the ground condition, the technical basis is provided for the eutrophication water reservoir management, and the scientific basis is provided for prevention and control of algae bloom in the water reservoir.
Description
technical field [0001] The invention relates to the development technical field of remote sensing monitoring of algae distribution in surface water of eutrophic reservoirs. Based on Landsat remote sensing image analysis, a monitoring method suitable for rapid monitoring of algae in eutrophic reservoirs is developed. Background technique [0002] Since the 1960s, lakes, reservoirs, rivers and bays in various regions of the world have successively experienced water eutrophication, which has attracted widespread attention and research by scientists. OECD's survey of lakes and reservoirs in 18 countries shows that the proportion of eutrophic type is as high as 65%, and only 18% is oligotrophic type. Among them, 70% of lakes and reservoirs in the United States are eutrophic. According to the information released by the European Environment Agency, since 1970, the proportion of eutrophication and heavy eutrophication in the lakes and reservoirs monitored and surveyed since 1970 i...
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IPC IPC(8): G01N21/31G06K9/00
CPCG01N21/31G06V20/188
Inventor 李灵慧龚庆碗吴婷金毅麟李建华
Owner TONGJI UNIV