| Urban road is an important part of urban space,which carries the traffic of the city and is the frame of urban construction.The road construction in the past focused more on connectivity and engineering design,but neglected the landscape and ecology of the road.This leads to the increase of impervious area of roads in the context of accelerated urbanization,and the problems of waterlogging,water shortage and pollution in many cities.In addition,environmental pollution in the operation of urban roads is also becoming more serious.The introduction of low impact development concept can greatly strengthen the construction of road landscape,rainwater control and road ecology.It is of great practical significance to improve urban ecology and build livable urban space environment.Based on the concept of low-impact development,this study studies urban road landscape planning and design.Jinhai Road in Hohhot is taken as an example for discussion.Specific research contents and methods are as follows:(1)Literature study,case study,induction and summary are adopted to explore the approach of urban road landscape design based on the concept of low-impact development.The relevant concepts are defined,and the relevant theories of low-impact development concept,urban road landscape design and research status at home and abroad are summarized.Two foreign and one domestic typical relevant cases are selected for study,and their design strategies and application points are summarized.This paper analyzes the feasibility and necessity of low-impact development of urban roads,analyzes its principles,objectives and design content combined with landscape elements,and finally puts forward the path of road landscape planning and design combined with LID concept.(2)Analyzed the existing road landscape ecological problems in Hohhot by field investigation method,and proposed the design solution strategy based on the concept of low-impact development.Consult data to analyze the regional overview of Hohhot,and carry out field research on four representative main roads with different functions in Hohhot,to find out the existing problems.Combining the results of framework analysis and problems existing in field research,specific strategies are proposed from the perspectives of natural elements,landscape elements and management measures and the concept of low impact development.It mainly includes:(1)In terms of natural elements,the design strategy of adapting to climate conditions,respecting landform,regulating hydrological environment and protecting green vegetation elements is proposed;(2)In terms of road landscape elements,specific design strategies are proposed from five aspects: road ontology,plants,road ancillary facilities,building optimization and water body.(3)In terms of management measures,environmental protection strategies in the process of low-impact development are proposed,including construction,operation,road traffic and management.(3)The design strategy based on the concept of low impact development was applied to Jinhai Road in Hohhot by case demonstration method and quantitative model analysis method,and SWMM software was used to simulate and verify the effect of the design strategy on the improvement of water environment.On the basis of investigation and analysis,a scheme of road landscape design renovation and low-impact development measures is proposed.Finally,SWMM software is used to conduct quantitative simulation and verification of stormwater runoff and pollutants before and after using low-impact development facilities,and chart data is used to illustrate the effectiveness of low-impact development measures in improving water environment.Through the means of landscape planning and design,combined with the concept of low-impact development,the planning path,measures and design strategies to solve the road rainwater problem and improve the ecological environment are obtained,and the solution of municipal road landscape design through different functional sections is proposed.In the road landscape design of Jinhai Road,SWMM model verification shows that the design strategy is feasible.This study can provide strategic reference for the construction of urban road landscapes under the guidance of the concept of low impact development,and can provide reference for the design and renovation of low impact development road landscapes in arid areas of northern China. |
