Method for evaluating rationality of river ecological island plant selection based on AHP

Abstract

The invention discloses a method for evaluating the rationality of river ecological island plant selection based on AHP, and the method comprises the following steps: building a hierarchical structure model which comprises a target layer, a decision layer and a factor layer; determining the relative weight of the influence degree of an evaluation factor on a corresponding decision factor through employing an AHP analysis method, and determining the relative weight of each decision factor on the influence degree of the target layer; evaluating and scoring each evaluation factor to obtain a factor evaluation score, and obtaining a plant total score L according to the factor evaluation score, the relative weight of the influence degree of the evaluation factor on the corresponding decision factor and the relative weight of the influence degree of the decision factor on the target layer, wherein the higher the total plant score L is, the higher the reasonability of the river ecological island to select the plant is. According to the method, the unified evaluation model can be established to scientifically and accurately evaluate the rationality of the alternative plants, the plant design efficiency of the ecological island is improved, and the design period is shortened.

Description

technical field [0001] The invention relates to the technical field of river channel ecological management, in particular to an AHP-based method for evaluating the rationality of plant selection on river channel ecological islands. Background technique [0002] With the rapid development of global industrialization and urbanization, water eutrophication has become a serious urban environmental problem. Plants have an efficient removal effect on eutrophication substances in water bodies, and can significantly improve water quality. In view of the advantages of using plants to purify water bodies with a wide range of functions, low purification costs, and taking into account landscape effects, in the landscape design of rivers, in the river. The selection of plants with good purification effect on the ecological island has also become the focus of the design. However, there are many types of existing plants, and landscape architects lack the criteria for evaluating the ration...

AI Technical Summary

Problems solved by technology

However, there are many types of existing plants, and landscape architects lack the criteria for evaluating the rationality of plants. Usually, they can only choose plants based on their own experience, which will easily lead to the phenomenon of choosing plants that are not suitable for the environment and cause a large number of deaths, resulting in secondary pollution of the river, which cannot meet the requirements. In addition, the existing process of plant selection based on one's own experience takes a lot of time, resulting in low plant design efficiency, prolonging the design cycle of the ecological island, and failing to meet the construction needs

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