Study On Plant Landscape Evaluation And Optimization Design Of Waterfront Space Of Youhe River In Weinan City

Water is the lifeline of a city,and plants are the lifeline of a city."Defining a city by water" is an important prerequisite for urban planning and construction.At present,the urbanization process is speeding up,people’s perception and belonging to the landscape is increasing,which puts forward higher requirements for the improvement of the ecological environment of urban waterfront space.Waterfront space,as a very active public open space in the city,not only carries the urban culture,but also provides extremely precious ecological space and "natural oxygen bar" for the residents living in high-rise buildings.As one of the basic components of waterfront space landscape,plants play an important role in the stability and rationality of plant community structure;Good plant communities can beautify the environment,improve the microclimate,and enhance the ornamental and ecological value of landscape.Therefore,how to use the plant community to create a comfortable,reasonable and safe landscape is the new idea of this paper.How to use the plant landscape to enhance the value of waterfront landscape and protect biodiversity has become the research goal of relevant professionals.Based on the summary of the relevant theories of urban waterfront space,plant landscape,plant characteristics and landscape evaluation at home and abroad,this study takes the plant landscape of waterfront space as the research object,and takes the Youhe River in Weinan City as the main line,which is divided into: northwest area of Youhe Park,old street culture square,nanxiaoqiao square,riverside city garden,South Street Culture Square,South Street Culture Square,South Street Culture Square,South Street Culture Square,South Street Culture Square,South Street Culture Square,South Street Culture Square,South Street Culture Square,South 85 representative and comparable plant landscape sample plots were selected from five research sites of Qin Dynasty Cultural Heritage Park,and the composition,structure and type of plant community were analyzed.AHP(analytic hierarchy process)and SBE(scenic beauty estimation)were used to establish three benchmark layers and 15 index layers for landscape evaluation and analysis of 85 plant landscapes.Yaahp was used for data processing to calculate the weight value of each layer of plant landscape,Through analysis and calculation,the following conclusions are drawn: 11 of the two evaluation methods are grade I plant landscape sample plots;There were 32 grade II plant landscape plots;There are30 grade III plant landscape plots;There are two grade IV plant landscape plots.The average value of the sum of comprehensive evaluation index of 85 plant landscape sample plots is61.82.The data shows that the plant landscape of waterfront space of Youhe river is generally in class II plant landscape,and the landscape quality is good.According to the results of investigation and analysis,the advantages of plant landscape in waterfront space of Youhe River are summarized,that is,higher visual comfort and obvious functional zoning,and the shortcomings of the current situation are put forward.Finally,based on the current situation,this paper analyzes the existing problems,puts forward reasonable overall optimization strategies and suggestions,and establishes an optimization scheme for local areas.