Optimized Regulation Model of Human-Earth System Based on System Dynamics
基于系统动力学方法的人地系统优化调控研究

The study of human-earth system is the most important content in geography; regional sustainable development relies on the reasonable structure optimal model and effective regulation of the regional human-earth system. The county region is a complex and opening human-earth system. With Huangling county as an example, the environment, resources exploitation, economic development and structure evolvement of industry were systematically analyzed. And the systematical dynamic model was established and multi-projects were simulated with the theory and method of system dynamic. Optimized regulation models of the human-earth system evolvement were educed based on three projects: (1) Traditional evolvement method. The intensity of the resource exploitation and environment pollution is the least, but the speed of its economic development is the lowest, which restricts social sustainable development and economic reproduction. (2) Economic development method. The intensity of the resource exploitation and environment pollution is the worst and economic development mostly depends on high investment and pollution, which is a traditional mode of unsustainable development. (3) Harmonious development mode. The mode considers not only economic sustainable development and reasonable natural resources utilization, but also gives more attention to environment protection and harmonious development of industry, agriculture, tourism and so on. It is the most optimized mode of the human-earth system evolvement.