Method for quantitatively evaluating influence of offshore aquaculture pond on concentration of offshore Chl-a

Abstract

The invention provides a method for quantitatively evaluating the influence of an offshore aquaculture pond on the concentration of offshore Chl-a, and the method comprises the steps: firstly obtaining a remote sensing image of a research area, and extracting the spatial distribution of a offshore aquaculture pond; downloading and processing a chlorophyll a concentration data product; secondly, downloading and processing coastline data, and establishing an evaluation sample area based on the processed coastline data; and finally, obtaining a product based on the aquaculture data and the chlorophyll a concentration data, counting the near-shore aquaculture area and the chlorophyll a concentration mean value in the sample area, taking the aquaculture area as an independent variable and the chlorophyll a concentration mean value as a dependent variable, and quantitatively evaluating the influence of the aquaculture pond on the offshore chlorophyll a concentration space-time distribution by adopting Pearson correlation analysis. The invention can quantitatively evaluate the influence of the offshore aquaculture pond on the spatial and temporal distribution of the offshore chlorophyll aconcentration in a regional or national scale, and provides theoretical guidance for sustainable development planning of the coastal national aquaculture industry and formulation of near-seawater environmental protection policies.

Description

technical field [0001] The invention belongs to the field of remote sensing applications and relates to a method for quantitatively evaluating the influence of nearshore aquaculture ponds on the concentration of Chl-a in the nearshore. Background technique [0002] As one of the fastest growing food production sectors in the world, aquaculture is an important food supply industry in many countries and an important contributor to global food security and protein intake. However, driven by factors such as animal food demand, economic benefits and social development, the global aquaculture industry has flourished in the past three decades. The continuous expansion of the area and scale of aquaculture has transformed a large area of ​​valuable land and sea environments, followed by the loss of the supply capacity of the natural resource system, resulting in a series of ecological and environmental problems, such as habitat degradation, surface and groundwater pollution, Eutroph...

AI Technical Summary

Problems solved by technology

At present, studies on the impact assessment of nearshore aquaculture ponds on coastal seawater environments are mainly qualitative descriptions or small-scale quantitative evaluations carried out by comparing the water quality changes in and outside the aquaculture ponds by using field sampling laboratory analysis methods. Quantitative evaluation methods on a large scale at the macro scale are difficult to provide decision support for the sustainable development planning of aquaculture ponds at the regional or national scale and the protection of offshore seawater environments

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