Construction and application of index system of ecological environment carrying capacity of urban land resources: a case study of Beijing
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摘要: 根据DPSIR模型构建了城市土地资源中生态环境承载力的指标体系,该体系的创新之处在于通过结构化的指标设计将生态环境与人口、经济、社会发展和管理等其他要素纳入统一分析框架,充分考察了各要素之间的密切关联。在实证分析方面,以北京市为例,对其2011—2014年土地资源中生态环境承载力的相关指标变动趋势情况进行分析。结果表明:人口增长与经济增长两大驱动力指标持续上升,对土地资源带来的压力持续存在且逐年增大;城市建设用地的压力不断增大,居住用地造成的压力最为显著;从反应指标和状态指标看,北京市在努力加强城市绿化和生态保护工作,但影响指标目前尚无显著改善,大气污染和水资源短缺等情况仍不容乐观。最后,针对如何评价和提升城市土地资源中生态环境的承载力提出了政策建议。Abstract: According to the DPSIR model, the index system of the ecological environment carrying capacity of urban land resources was constructed. The system integrates ecological environment and the population, economy, social development, management and other elements into a unified analysis framework through structural design of indicators, and fully considers the close relationship among all the above elements. Taken Beijing for case study, the changing trend of the relevant indicators of the ecological environment carrying capacity of land resources was analyzed based on the data from 2011 to 2014. The results showed that the two driving force indicators, i.e. population growth and economic growth, had been rising steadily, which had led to increasing pressure on land resources year by year in Beijing. The pressure from urban construction land use had been increasing, and the pressure from residential land use was the most significant. As can be seen from the responses indicators and state indicators, the urban greening and ecological protection in Beijing had been strengthened a lot, but the impact indicators had no significant improvements at the moment and the problems such as air pollution and water resources scarcity were still not optimistic. Finally, policy recommendations were put forward on how to evaluate and improve the ecological environment carrying capacity of urban land resources.
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Key words:
- land resources /
- ecological environment /
- carrying capacity /
- DPSIR model
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