Investigation And Benefit Post-evaluation Of Ecological Bank Revetment In Rudong Section Of Bencha Canal

With the continuous progress of society and the rapid development of economy,people began to realize that the construction of water conservancy projects will destroy the ecological balance of the river,making the functions of the river gradually degraded and the ecological environment gradually deteriorated.In order to build a modern ecological home,people not only pay attention to the safety of river revetment,but also pay more attention to the ecological environment of the river.The research of ecological revetment has become a hot spot of river revetment engineering.On the other hand,the design and selection of ecological revetment depends on experience,lacks a unified evaluation system,and lacks quantitative analysis in the later effect evaluation.Therefore,it has become an important direction of revetment research to systematically and comprehensively evaluate the selection and effect of ecological revetment,and propose a suitable ecological revetment model in river regulation.In this paper,the ecological revetment of the eastern section of the Bencha Canal is taken as the research object.Firstly,the current situation of the river in the eastern section of the Bencha Canal is investigated and analyzed,and the common types of ecological revetment are introduced.Summarize the problems existing in river management,establish an evaluation index system,evaluate and analyze the effectiveness of ecological revetment selection and revetment scheme application,and verify the application effect of ecological revetment.The main research results are as follows:(1)The problems existing in the eastern section of Bencha Canal were investigated and analyzed,which provided a realistic basis for the evaluation of ecological revetment selection and benefit post-evaluation.Combined with the analytic hierarchy process and fuzzy comprehensive evaluation method,the relevant theories of ecological revetment evaluation are expounded,which provides theoretical support for the selection evaluation and benefit post-evaluation of ecological revetment.(2)Combined with the selection principle of ecological revetment,the selection and evaluation of interlocking block ecological brick revetment,stepped ecological retaining wall,new material ecological imitation wood pile,new prestressed wave pile,ecological landscape combination revetment pile and dense row wood pile are carried out by using analytic hierarchy process.It is found that the benefit of ecological landscape combination revetment pile is the best,and the design scheme of ecological landscape combination revetment pile is determined.(3)A post-evaluation index for the effectiveness of river ecological revetment regulation is constructed.Based on the analytic hierarchy process,the engineering benefit,ecological benefit,landscape benefit and economic benefit are selected as the evaluation indexes.The weight of each index in the evaluation system is determined by the judgment matrix,and the fuzzy comprehensive evaluation method is used for comprehensive evaluation.It is concluded that the final evaluation score of the post-evaluation of the ecological revetment benefit of the Qilique Bridge-Tibet Wangmiao Bridge in the Rudong section of the Bencha Canal is 0.6154,and the evaluation result is ’efective’.At the same time,based on the Matlab platform,the application software of ecological revetment comparison and benefit post-evaluation is developed.