Research On The Optimization Of Ecological Service Function In Dense Urban Built-up Area

By 2020,the urbanization rate of China’s permanent population has reached 63.89%,and more than 900 million people live in cities all the year round.Therefore,the sustainable development of cities is the key to promote the overall planning of urban and rural areas,crack the urban-rural dual structure,and realize the sustainable development of human society.Among them,the function of urban ecological service function plays a key role,and the strength of its service function is not only affected by natural factors,but also closely related to human activities in cities.The change of land use type will lead to the change of ecosystem service function and its value.Therefore,with the help of land use dynamic degree,land use degree and land use transfer matrix,this paper analyzes the change of ecosystem service function value brought by land use change,and then determines the relationship between them.It is of great significance for the research of urban ecological service function and the planning practice of ecological city.Based on the interpretation and analysis of remote sensing images in 2010,2015 and 2020,six types of land were obtained: cultivated land,woodland,grassland,water area,urban and rural construction land and traffic land.Combined with the specific characteristics of Chengdu,this paper revised it,and finally calculated the ecological service function value,all kinds of service value,and the service value per unit area of land and per unit population of each administrative region in the study area over the years,so as to analyze the specific influencing factors,and put forward the development countermeasures based on this.This paper is divided into the following parts:(1)In this paper,the domestic and foreign researches on ecosystem service function and urban ecosystem service function are sorted out,and the breakthrough point of the paper is found.On this basis,the domestic and foreign literatures on ecosystem service function,ecosystem service trade-off and coordination,and ecological economy comprehensive research are reviewed;(2)To identify the components and structural characteristics of the ecosystem and its service function in the urban intensive built-up area,the characteristics compared with the natural ecosystem service function,and the more important service function types for the development of the city and the daily life of urban residents;(3)To determine the evaluation method of ecosystem service function in urban dense built-up area,and provide some reference for the evaluation of ecosystem service function in other similar areas;(4)Based on the value evaluation of ecological service function of urban dense built-up area,the paper puts forward the existing problems and corresponding development countermeasures of its ecological service function from the macro and micro levels,so as to provide reference for the protection and management of urban ecological environment and different levels of urban and rural planning(land space general planning,land use planning,urban planning,urban planning,urban planning,urban planning and urban planning).It also provides a complete case for the study of ecological service function in intensive construction area.