| Regional carrying capacity refers to the ability of the resource and environmental system that can be carried as the main foundation of regional development and the corresponding total economic and social activities under the conditions of ensuring the rational development and utilization of resources and the development of ecological environment to a virtuous circle.From the point of view of complex systems,the self-organized development of resource and environment systems is unsustainable.Due to the existence of humanistic consciousness,the development of ecosystems is developed in the form of self-organization of humanities,making the sustainable development of the system possible.The study of regional carrying capacity is the key to making this possibility feasible and an integral part of regional sustainable development planningThe natural endowment of the resource environment is the material basis for the existence and development of the human social system.The rapid and extensive development model of the economy has led to an increasingly prominent contradiction between social development and the environment.With the rapid increase in population,the scarcity of resources and the growing environmental conditions.A series of problems such as deterioration,social economic activities are above the carrying capacity of natural systems.In this context,we must rationally use all aspects of natural resources,science and technology,etc.,while improving the benefits of economic growth,while ensuring environmental quality,fully consider the carrying capacity in development,and strive to achieve economic development and coordination of the ecological environment.To achieve a virtuous circle of natural ecosystems and socio-economic systems,carry out multi-development scenario simulation and early warning,and continuously protect and enhance sustainable development.The study uses coastal cities in the Bohai Rim region and its coastal waters as research areas,integrating air pollution data,seawater quality data,marine space utilization data,land use data,ecological environment planning data,and comprehensive GIS spatial analysis and space.Principles and methods such as statistical analysis,Gaussian Plume Model,Multidimensional State Space model,and Ecological footprint are used to evaluate the bearing capacity status of the study area and different scenarios.(1)Evaluation method of regional resources and environment carrying capacity of land and seaBy analyzing the existing index system evaluation model,considering the support capacity of the region itself,the interference capability of the human society and the total amount of regional bearers,and considering the evaluation results of land carrying capacity and sea area carrying capacity,the land is constructed.The indicator system for the assessment of resource and environmental carrying capacity of the sea.For the construction of the bearing capacity evaluation method,this paper applies the state space method in the European geometric space to the evaluation of the regional resource environment carrying capacity,and constructs a multi-dimensional state space composed of the resource axis,the environmental axis and the human active axis.The positional relationship of the points in the state space reflects the regional bearer status.In the evaluation of regional adjustment capability,combined with the impact of sea ports and land traffic on the entire region as a land-sea traffic coordination point,the relevant parameters of the Gaussian plume model for pollutant diffusion are adjusted to make it suitable for regional port traffic.The evaluation of the role of cyberspace.(2)Evaluation of resource carrying capacity of multi-dimensional state space resourcesQuantitative analysis of regional resource utilization,environmental capacity and social self-regulation ability,the multi-dimensional state space model is used to quantitatively evaluate the regional bearing status,and the regional bearing status is described from a comprehensive perspective.Most areas of the study area are in full load.The areas where the regional resources and environmental carrying capacity are not overloaded are mainly concentrated in Weihai City,Yantai City,Dandong City,Panjin City and Huludao City;the overloaded area is concentrated in Tianjin downtown area,Binhai New Area,Qingdao City,Tangshan City and Zhangzhou City,among which Qingdao City and Panjin City are in a state of overweight police.From the overall distribution of sea space,the coastal waters in most areas of Liaoning Province,Yantai City and Weihai City are in full load,and the coastal waters of Tianjin,Hebei,Dongying,Binzhou and Huludao are overloaded.The coastal waters of Qingdao City are in an overweight state(3)Simulation and early warning of regional resource and environmental carrying capacityFor the treatment of the bearing capacity spatial impact factor,set up five regional activity development scenarios:population trend development,innovation-driven regulation,port traffic regulation,environmental constraint and ecological compensation,and determine the target population size by Logistic regression method.The ecological environment protection plan determines the target environmental capacity and ecological footprint method to formulate the regional ecological compensation mechanism,simulates the early-stage bearing capacity prediction situation under the five conditions,compares and analyzes the simulation results,and makes recommendations for regional sustainable development on this basis.The population growth has increased the pressure on the regional resources and environment to a certain extent.The greater the growth rate,the easier it is to be overloaded;the constraint of environmental capacity has a more obvious effect on the regional bearing status,followed by port traffic and technology.The adjustment function of the innovation level,the ecological compensation mechanism has a weak effect on the regional bearing state.In the process of regional development,due to the constraints of the resources of the region itself,it is necessary to improve the regional resource flow and utilization efficiency by improving the technological innovation level of the region and the port transportation advantage.At the same time,work together with the ecological environmental protection plan to strengthen the regional environment for human activities.The role of constraints to promote regional coordination and sustainable development. |