Research On River Channel Imitation Natural Habitat Construction Technology In Benxi Of Taizi River

In recent years,with the acceleration of urbanization,urban rivers have caused a series of water ecological problems due to factors such as the construction of dams,river dredging,and alteration of riparian zones,research on the theory and technology of river imitation natural habitat construction can provide technical support for urban river ecological restoration and habitat improvement,and has certain theoretical and practical significance.In this paper,based on the investigation of rivers in the Benxi City section of the Taizi River and the experimental research on imitating natural habitats,the design of the simulation experiment of the natural habitat creation technology of the river channel is carried out.The results of the research can provide technical support for river ecological restoration in the Benxi City section of the Taizi River,it will have certain practical value.This article relies on the national water special project to carry out on-site investigation and field survey of the section of the Benxi City in Taizihe River,clarifying the current structural status,water quality indicators and biodiversity indicators of the river research area in the urban area,and further imitating the natural habitat of the river in the Benxi City section of the Taizi River.The research results are as follows:(1)The COD,ammonia nitrogen,total nitrogen,and total phosphorus in the water quality index are between the national standards for surface water environmental quality from class I to class II in the upstream of the urban section(GB3838-2002).The middle and lower reaches of the urban area are between Class III and IV standards,and some of the sewage outlets meet Class V standards.The DO index conforms to the National Class I Standard for Surface Water Environment Quality,but reaches the Class II to Class III standard in the middle and lower reaches of the sewage drainage ditch.Biodiversity presents a trend of simplification(2)An experimental device for imitating natural habitats of rivers was built,and experimental studies were conducted on the impact of deep pools and submersibles on DO.Experimental study on the effect of spur dike on DO,experimental study on the influence of submerged dam on DO,experimental study on the influence of spur dike,submerged dam,and deep pool-shoal combined on DO,The results showed that the combination of spur dikes,submerged dams and deep pool-shoal enhanced DO.(3)On the basis of experimental research on riverbed-like natural habitat creation techniques,combined with the actual conditions of the Benxi City section of the Taizi River,a construction project for the imitation of natural habitat construction demonstration projects for the rivers in the Benxi City section of the Taizi River was proposed.The results of this study can provide technical support for river ecological restoration in the Benxi City section of the Taizi River,and can provide a reference for similar natural rivers in the country to imitate natural habitats.