Study On Landscape Design Evaluation System Of Rainwater Garden In Hefei

The rainfall in Hefei is small and the distribution of seasons is uneven.Rainwater garden is the source of urban rainwater treatment facilities,which can retain rainwater,effectively reduce storm runoff,reduce urban rainwater disaster,and improve the existing rainwater problems in Hefei.In addition,a scientific and reasonable evaluation system should be established to determine whether the results of the "physical examination" rainwater garden landscape design are ideal or not.Starting from the research topic of landscape design evaluation of rainwater garden,a set of scientific and operable evaluation index system is obtained by using expert investigation method,analytic hierarchy process and fuzzy comprehensive evaluation method.Finally,the rainwater garden along Luzhou Avenue in Hefei city is taken as the research object to evaluate its landscape design.The main contents and results are as follows:Based on the study of landscape design evaluation method and the characteristics of rainwater garden landscape,the evaluation method of rainwater garden landscape design based on fuzzy comprehensive evaluation theory of analytic hierarchy process is proposed.Based on the analysis of the elements of rainwater garden landscape,this paper deduces the primary index system of rainwater garden landscape design by using the theory of landscape ternary theory.Combined with the relevant natural conditions of Hefei City,the evaluation factors of landscape design are determined by expert survey method and public survey method,and the weight of each evaluation index is weighed to obtain the evaluation model of rainwater garden landscape design in Hefei.By analyzing the evaluation model of the rainwater garden landscape design in Hefei,the ranking of the weight of each evaluation index is obtained:the ranking of the weight value of the criterion layer A-B is B3(Basic function)>B1(Ecological environment)>B2(Visual aesthetics).The order of importance of the sub-criteria layer B-C from high to low is:C31(Engineering safety)>C11(Own ecological environment)>C34(Rainwater treatment capacit)>C32(Traffic smoothness)>C23(Beautiful landscape)>Ci2(Impact on urban ecology degree)>C33(Economic benefit)>C22(Beautiful landscape stone>C21(Plant beauty).Using the established evaluation model of rainwater garden landscape design in Hefei City,this paper evaluates the landscape design of rainwater garden along Luzhou Avenue in Hefei City,and calculates that the final score of rainwater garden along Luzhou Avenue belongs to the value range of[90～70].Therefore,the evaluation result of rainwater garden landscape design along Luzhou Avenue is grade Ⅱ(good).The design and construction can be further developed and improved.The evaluation results are consistent with the actual situation,which proves that the evaluation model of Hefei rainwater garden landscape design based on AHP fuzzy comprehensive evaluation is scientific and feasible.According to the score of evaluation results,the advantages and disadvantages are analyzed,and suggestions for optimization and transformation are put forward.