Abstract
In 2005, published by the United Nations explicitly proposed the close relationship between ecosystem and human well-being for the first time. Forest and wetland, as the world's three largest ecological systems, together with the ocean, provide comprehensive ecological, economic and social benefits for the sustainable and stable development of cities. With the introduction of and , the research on forest and wetland conservation and utilization has been developing and deepening. The beijing-tianjin-hebei city cluster is an important national strategy to drive the development of northern China. Large-scale construction of forest and wetland ecological transition zone is the key work to promote the coordinated development of the beijing-tianjin-hebei region. Since the implementation of < AAA > in 2015, the forest coverage rate of Beijing has reached 44%, and a total of 6,674 hectares of wetlands have been restored. However, the beijing-tianjin-hebei region, with a permanent resident population of more than 100 million, accounts for 8.1 percent of the country's total population and 9.4 percent of its gross domestic product, is a world-class super-large city group. The pressure of social and economic development still causes many ecological and environmental problems, such as urban heat island effect, air pollution and water shortage. Optimizing and improving the service efficiency of forest and wetland ecosystems is of key significance to the ecological environment construction in the beijing-tianjin-hebei region. In this study, the spatial elements of forest wetlands in the beijing-tianjin-hebei region were accurately identified from the perspective of blue and green space coordination. Eleven core service efficiencies of six categories (air purification, carbon fixation and oxygen release, water quality purification, climate regulation, water conservation, leisure and recreation) were selected in the study to construct a service efficiency evaluation system for forest green space and blue wetland space. Using i-tree, GREENCITY and actual measurement, the spatial service efficiency of forest wetland in beijing-tianjin-hebei region was simulated and calculated. Bivariate local spatial autocorrelation analysis model (LISA) and multiple regression equation (SPSS) were used to analyze the correlation between service efficiency and spatial distribution in three groups: air purification and carbon sequestration and oxygen release in forest wetland space, water purification and water conservation, climate regulation and leisure and recreation. The spatial distribution and service efficiency coupling collaborative model of forest wetland in beijing-tianjin-hebei region were constructed. On this basis, according to the relevant key elements of urban planning, the comprehensive utilization of land use prediction model (FLUS) is used for scenario simulation and optimization analysis, and a variety of optimal simulation scenarios are proposed. In order to guide beijing-tianjin-hebei city cluster forest wetland space supplement, specific planning and location selection, to achieve dynamic collaborative optimization.
