基于GIS的三峡库区云阳县生态经济区划

采用自上而下的生态要素宏观分析与自下而上的经济要素微观分析相结合的方法，运用GIS分析手段对复杂的自然生态要素与人类经济活动的时空变化及其相互作用进行分析和表达，以地处三峡库区腹地的典型山地县云阳为例，根据不同区域所表现出来的对生态变化与人类经济社会活动变化的承载力差异，即不同生态经济地域系统的稳定性、干扰能力、承受能力、生产能力和可利用方式的明显差异，进行综合生态经济区划。分区结果的命名体现了生态系统的地域特征和该区域生态经济发展的方向。通过对各生态经济区特征的分析。旨在协调日益激化的人地矛盾，探讨生态经济的发展方向、途径和对策，为三峡库区大尺度生态-经济-社会的可持续发展研究提供经验和样本。

GIS-based study on the ecological-economic regionalization of Yunyang County in Three Gorges reservoir area

The frangible eco-environment system in the Yangtze Three Gorges reservoirs area is being threatened by excessive and careless reclamation. Meanwhile, the economic development level of this area is relatively low. The conflict between economic growth and stabilizing the eco-environment system is sharp because of this contradiction. This paper employs GIS (Geographic Information System)-based methods for analyzing human-land interaction and spatial-temporal diversification between complex ecological factors and economic activities. It integrates and utilizes both up-down ecological deduction and down-up economic induction methods to explore the eco-economic regionalization, projection and optimization. We employed Yunyang County in the three Gorges area as a representative case for the discussion. Through the GIS-overlapping analysis of ecological factors, statistical clustering of economic factors and the qualitative amendment of expert knowledge system, we tentatively categorized the eco-economic system in Yunyang County into four eco-economic zones: first, the ecological reconstruction and industrial-agricultural-tourism integration-development zone, it mainly includes the low mountains and bottom glades along the Yangtze river; second, the water-soil maintenance and riverhead self-restraint forest-husbandry zone, which includes areas in the middle mountain ridges of north Yangtze river; third, the ecological optimization and forest-husbandry-tourism zone, which includes areas in the middle mountain ridges of south Yangtze river; and fourth, the ecological conservation and moderate economic development eco-economic zone, which includes most areas in the high and middle mountain ridges of north Yangtze river. According to the principles of sustainable development, the four eco-economic zones should develop ecologically sustainably and economically effectively. All the economic decisions should be aware of the conservation of ecological value, and ecological decisions should consider the economic effectiveness as well. The small-scale study presented in this paper on eco-economic regionalization will provide some insights for large-scale research on ecological-economic-social sustainable development in the Three Gorges reservoir area.