Urban Green Route System Planning And Safety Evaluation

China is in the stage of rapid urbanization development.The rapid expansion of the city scale and major changes in the landscape pattern have led to complex and serious urban problems: serious fragmentation of urban ecological space,decline in ecosystem function and biodiversity;shortage of green land,squeezed landscape space and lack of necessary Contact,the quality of human life is reduced;the development of "spreading the pie",the regional cultural heritage is distributed in an "isolated island" style,and the traditional style and characteristics are lost.The contradiction between these conditions and people’s increasing demand for beautiful cities and a better life is outstanding,and there is an urgent need to seek a scientific solution.Traditional urban planning methods to increase urban “quantity” and “stock” to solve urban problems have made it difficult to adapt to new urban development and people ’s needs.The Green Corridor is a sustainable urban planning method,linear open space and green infrastructure that can jointly raise various green resources,promote the exchange of materials,energy and information,and improve the "quality" and "flow" of the green space system;It uses a linear connection and efficient circulation to integrate various types of resources and elements into a structure and function to form a specific green system;due to its linear characteristics,it can be realized with limited land use and lower cost The long-distance,cross-regional,networked,multi-functional,high-efficiency,and diversified resource exchange and circulation in space,taking advantage of the complementary advantages,coupled growth,and catalyst effects of energy information from various resources are feasible to solve current urban problems.Effective Ways.This study focuses on the urban green corridor system planning and safety evaluation.Based on the definition of the concept and nature of the green corridor,the diversity and complexity of its functions are analyzed,and the three main basic functions of ecology,landscape and culture are summarized;As a guide,guided by the three major functional classifications,from the perspective of differentiation of biodiversity maintenance,landscape fairness and spatial accessibility,and local traditional protection and revival,carry out investigation and analysis of corridor resources and their characteristics,and select the least cumulative resistance model,Attractive potential energy model and Delphi statistical model,etc.to carry out the model of the potential route,and according to their respective standard selection and optimized treatment of the route,thus constructing a natural ecological corridor,landscape recreation corridor,culture The research results of the heritage corridors;then,with the help of Arc GIS \ SPSS and other related software platforms,each single function route is determined to be superimposed,combined with the current urban green corridor conditions,and coordinated and integrated to form a complete function and structure of the urban green corridor system Research results;on this basis,the effective evaluation of the scientific and feasibility of urban green corridor system planning is analyzed Methods,that is,the safety evaluation of the structure and function of connectivity,suitability,etc.,and the scope and process of application;finally,combining the aforementioned research ideas and methods with specific cities,empirical research is carried out in the case of Nanchang City,a central city in China,to analyze Nanchang As the local characteristics of the plain area,landscape city,and historical and cultural city,with the help of basic data and image analysis tools,the city ’ s green corridors are planned to form "one heart,two axes,three districts,six rings,ten belts,multi-lines" The research results of the system pattern;through the safety evaluation of corridor connectivity,suitability,fuzzy comprehensive evaluation,etc.,the rationality and practicality of the planning of the green corridor system in Nanchang City were verified to ensure its maintenance and realization of urban green safety.The research is guided by multidisciplinary theories such as landscape architecture,urban planning,geography,landscape ecology and social sciences,and focuses on innovation: the concept and connotation of urban green corridor systems are proposed.The theoretical view of the transformation of the "flow" standard;problem-oriented,using the "analysis-synthesis" method,not only from the multiple perspectives of ecology,landscape and culture,the precise construction of corridors,but also to the unified and unified green corridors Under the framework,it overcomes the shortcomings of comprehensive corridor research and unclear direction;it selects mathematical models suitable for its own characteristics to construct various functional corridors,and its rational and objective parameterized operations overcome the shortcomings of perceptual subjective research;The safety evaluation of the road system has verified the rationality and feasibility of the research process and results,and is an effective guarantee for its planning quality and benefits.The empirical research on green corridors based on the distinctive local characteristics of Nanchang City has an important role in the planning of green corridor systems in other cities.Certain demonstration and enlightenment.