Ecological Risk Assessment of Provincial Land-Use Overall Planning in China

摘要

The method evaluating the ecological risk for provincial land-use overall planning is introduced so as to construct an environment-friendly land-use pattern. The ecological risk degree is determined by risk source intensity and ecological vulnerability degree. In order to quantify them, the calculation process, classification standard, and acceptability analysis are established. With an example, it evaluates the ecological risk of land-use overall planning in Sichuan Province. The results show: (1) the implementation of planning can reduce the potential ecological risk effectively, and the whole ecological risk level is on the decline during the planning period; (2) the spatial difference of ecological risk is significant. However, the basic pattern of ecological risks, which is higher in the east and lower in the west, has not changed after the planning implementation, and the higher risk areas mainly distribute in the economically developed and densely populated areas; (3) according to the spatiotemporal characteristics, the emphasis of ecological risk prevention and control can be identified, and some counterrmeasures can be suggested in order to decrease the potential adverse effects. The method proposed in the article can provide decision basis for provincial land-use overall planning, and is helpful to ecological risk analysis of other planning.