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Inland lake and reservoir cyanobacterial bloom intensity evaluation method and device based on remote sensing

A technology for cyanobacteria bloom and intensity evaluation, applied in character and pattern recognition, image data processing, instruments, etc., can solve the problems of unevaluated areas of cyanobacteria blooms, human activities, and threats to water intakes of cyanobacteria blooms

Active Publication Date: 2021-01-15
MINISTRY OF ECOLOGY & ENVIRONMENT CENT FOR SATELLITE APPL ON ECOLOGY ENVIRONMENT
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  • Application Information

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Problems solved by technology

[0004] In the prior art, researches on cyanobacterial blooms using remote sensing are all attempts to analyze and evaluate the intensity of cyanobacterial blooms in the lake from the perspective of remote sensing or the ground, but they have not evaluated the impact of cyanobacterial blooms on the human activity areas around the lake. Does not highlight the threat of cyanobacterial blooms to water intakes at water supply sources

Method used

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  • Inland lake and reservoir cyanobacterial bloom intensity evaluation method and device based on remote sensing
  • Inland lake and reservoir cyanobacterial bloom intensity evaluation method and device based on remote sensing
  • Inland lake and reservoir cyanobacterial bloom intensity evaluation method and device based on remote sensing

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Embodiment 1

[0063] Embodiments of the present invention provide a method for evaluating the intensity of cyanobacterial blooms in inland lakes based on remote sensing, such as figure 1 As shown, the method includes:

[0064] S1: Obtain remote sensing images covering the lake and reservoir area.

[0065] In this step, satellite remote sensing image data with red light (630nm-690nm) and near-infrared (760nm-900nm) bands are selected. The spatial resolution of remote sensing images should depend on the size of the lake reservoir area, the smaller the lake reservoir area, the higher the spatial resolution requirement. The remote sensing image data covers at least 90% of the lake area; within the lake area, the cloud coverage is less than 50%.

[0066] S2: Preprocess the remote sensing image to obtain the remote sensing albedo image. The preprocessing includes geometric correction, space cropping, radiometric calibration, apparent albedo calculation and atmospheric correction.

[0067] Geom...

Embodiment 2

[0130] Embodiments of the present invention provide a remote sensing-based evaluation device for the intensity of cyanobacterial blooms in inland lakes, such as figure 2 shown, which includes:

[0131] The remote sensing image acquisition module 1 is used to acquire remote sensing images covering the lake area.

[0132] The preprocessing module 2 is configured to preprocess the remote sensing image to obtain a remote sensing albedo image. The preprocessing includes geometric correction, space cropping, radiometric calibration, apparent reflectance calculation and atmospheric correction.

[0133] The lake area image acquisition module 3 is used to acquire the remote sensing albedo image of the lake area from the remote sensing albedo image.

[0134] The normalized difference vegetation index calculation module 4 is used to adopt the normalized difference vegetation index method to extract the normalized difference vegetation index NDVI of the remote sensing albedo image of th...

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Abstract

The invention discloses an inland lake and reservoir cyanobacterial bloom intensity evaluation method and device based on remote sensing, and belongs to the field of water pollution monitoring. According to the method, the distribution range and the area of the cyanobacterial bloom are obtained through the remote sensing image, and the cyanobacterial bloom intensity is evaluated according to the proportion of the area of the cyanobacterial bloom, the influence condition of cyanobacterial bloom outbreak on cities and towns and the influence condition of cyanobacterial bloom outbreak on a drinking water source water intake; the method highlights the cyanobacterial bloom outbreak degree and the influence of cyanobacterial bloom outbreak on human activity areas around lakes and reservoirs andwater intakes of water supply water sources, and provides a scientific basis for lake and reservoir water environment management.

Description

technical field [0001] The invention relates to the field of water body pollution monitoring, in particular to a method and device for evaluating the intensity of cyanobacteria blooms in inland lakes and reservoirs based on remote sensing. Background technique [0002] With the development of my country's socialist process and the advancement of modernization and industrialization, the pollution of inland lakes and reservoirs in my country is becoming more and more serious, and the problem of eutrophication is becoming increasingly prominent. As the most obvious sign of severe eutrophication, cyanobacterial blooms are ubiquitous in inland lakes and reservoirs in my country. Cyanobacterial blooms cause lake water to become smelly and affect the ecological landscape of lakes and reservoirs. In addition, algae toxins produced by cyanobacteria blooms enter into organisms and human bodies through the food chain, and threaten human health. [0003] The traditional monitoring of g...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06T7/62
CPCG06T7/62G06V20/188
Inventor 赵焕贾兴王晨赵乾吴传庆王雪蕾朱利殷守敬周亚明杨红艳冯爱萍孟斌王庆涛
Owner MINISTRY OF ECOLOGY & ENVIRONMENT CENT FOR SATELLITE APPL ON ECOLOGY ENVIRONMENT
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