Study On Urban Wetland Landscape Design Based On Health Assessment Of Natural Hydrological Processes

As an important driving factor of wetland formation,renewal and even extinction,natural hydrological process is related to the normal operation of urban wetland.This study based on urban wetland natural hydrological processes the analysis of the factors affecting health,establish assessment reference system,the wetland health assessment and identify problems,combined with the design optimization strategy for landscape design,can provide scientific basis for management of wetland and recovery,and better able to provide technical support for the urban wetland landscape design work.In this article,through analysis of related concepts of wetland health,influence factors,the analysis of domestic and foreign scholars to the progress of study and content,summarizes characteristics of urban wetland health evaluation,theory of urban wetland existing health evaluation methods,evaluation system and evaluation method of combing and summary,combining the characteristics of the wetland park itself to evaluate optimization,complete the health evaluation of wetland park,According to the evaluation results,the optimization strategy of targeted design is proposed.The main results are as follows:（1）Reference index selection of wetland Park:Based on the combination of frequency method and model method,this paper selects 12 reference indexes that are consistent with the characteristics of Tangxihe Wetland Park.To screen out eutrophic status of water,degree of riverbank scour,water area ratio,plant diversity,coverage rate of dominant plants,landscape uniformity,pollutant interception function,hydrology regulation index,water purification ability,habitat index,degree of human disturbance and average height of phragmites australis.（2）Establishment of reference standard for wetland park:In this study,the ideal condition reference method of suitable research area was selected as the method of establishing reference system,and the reference standard for health evaluation of Tangxihe Wetland Park was established according to the idea of standard threshold method and combined with the research results of relevant scholars.（3）the wetland park health evaluation results:pond wetland park kosi health score of 0.2052,compared with frame of reference of relative gap bring▲(4₄)view in the degree of eutrophication of water bodies,after years of aquatic plant coverage,water area ratio,hydrology adjustment ability,ecological habitat conditions,degree of human interference,and other indicators have a certain gap with the frame of reference.（4）Landscape optimization design strategy and design ideas:based on the comparison of the health evaluation results and reference system of Tangxihe Wetland Park,the design optimization strategy for conservation was established.According to the design optimization strategy,three design ideas of water environment state restoration,water environment process restoration and water environment habitat were determined.