Comprehensive Evaluation And Optimization Strategy Of Plant Landscape Of Low Impact Development Facilities

In recent years,rapid urbanization and unreasonable development and utilization have caused a series of urban water environment problems,such as water shortages,serious water pollution,and frequent waterlogging,which have severely affected and restricted urban economic development and ecological city construction.Sponge city,as an important concept of rainwater management and improvement of urban human settlement environment,has received more and more attention in urban construction in my country,and the corresponding low-impact development facilities have also been widely used as source-type and decentralized sponge technology.Plants are an important part of sponge cities and low-impact development facilities.Plants and sandy soil work together to perform ecological functions such as rainwater collection,rainwater regulation,slowing down the flow rate,purifying water quality,and promoting infiltration.Looking back at the existing research,the research on plants in low-impact development facilities mostly focuses on planning and design,plant selection and configuration,rainwater regulation and purification effects,etc.The comprehensive evaluation of completed projects mostly focuses on stormwater technology.However,for built-up projects,whether plants can be organically integrated with the functional structure of low-impact development facilities and whether they can fully perform their ecological functions has a profound impact on the effects of low-impact development and the construction of sponge cities.This paper takes Tianjin’s low-impact development facilities as the research object.First,through network retrieval,literature search,and field research,a comprehensive evaluation system for the plant landscape of low-impact development facilities is constructed from two aspects: visual landscape and stormwater performance.Rainwater performance includes water quality reduce and pollutants reduce,the visual landscape evaluation system model includes four criterion layers(ecological function,landscape benefit,cultural benefit,economic benefit)and 12 indicator layers;secondly,a comprehensive evaluation of the plant landscape of different types of low-impact development facilities in Tianjin was carried out,and the main problems existing in the plant landscape of low-impact development facilities were summarized;finally,comprehensive research results and evaluation results were put forward to optimize the plant landscape of low-impact development facilities.Summarize suitable plants and configuration models in Tianjin,apply theories to practice.