M-shaped artificial fish reef space layout optimization method

Abstract

The invention discloses an M-shaped artificial fish reef space layout optimization method. The method comprises the following steps: making M-shaped fish reef monomer models; building square unit fish reefs; three fish reef groups on diagonal lines parallel to the water flow direction in unit fish reef arrangement are selected, and four different fish reef group spacing conditions are set; sorting data obtained through a water tank experiment to obtain evaluation index data; adopting an entropy method as a weighting method for evaluating the flow field effect of the unit fish reef; performing evaluation based on hydrodynamic characteristics; evaluating a unit fish reef layout scheme based on hydrodynamics and economic cost; and combining the two evaluation results, comprehensively considering ecological benefits and economic cost, and finally determining an optimal layout optimization scheme. The method has the advantages that the flow field effect is enhanced, the number of single reefs is reduced by 10%, the manufacturing cost is reduced by 10%, the affected flow field range area is increased by 10%, the affected flow field range area is increased by 5%, greater ecological benefits are obtained with less economic investment, and a better living environment is created for more marine organisms.

Description

technical field [0001] The invention relates to the technical field of spatial layout optimization of artificial reefs, in particular to a method for optimizing the spatial layout of M-shaped artificial reefs. Background technique [0002] Artificial reefs have been widely used in the construction of major marine ranch projects across the country for their good marine ecological restoration and fishery resources conservation, and have become the facility foundation for marine ranch construction. With the increasingly prominent effect of artificial reef construction, more and more coastal areas have started the status quo of large-scale deployment. M-type marine treasures multiplication and protection reef is an M-type structure artificially set in the waters. Its sides are distributed with holes and have strong stability, which can ensure good water exchange and water flow permeability inside the single reef. The internal and external surfaces of the reef have a large biolo...

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Problems solved by technology

[0003] Reasonable planning should be carried out before the artificial reef is launched, and the configuration mode suitable for the target area and target species should be selected, because the construction of artificial reefs is a process with huge capital investment and irreversible. Becoming marine litter is harmful to the marine environment and can also cause economic losses

The impact range, flow distribution and hydrodynamic characteristics of the flow field generated after the artificial reef is put in will vary depending on the type, structural shape, scale, layout and scope of the put in fish reef, as well as the original flow field at the place where the artificial reef is put in. However, at present, the comparison of the flow field effects of different artificial reefs is mostly descriptive research, that is, the strength and scale of upwelling and back eddy currents are described according to experimental phenomena or numerical simulation results, and there is a lack of conclusions after systematic evaluation. draw specific conclusions

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