XIONG Yong,ZHAO Cui-wei.Dynamic Assessment on Land Ecological Security in the Process of Urbanization in Mountain Areas—A Case Study of Guiyang City[J].Research of Soil and Water Conservation,2014,21(04):195-202.
山地城镇化进程中土地生态安全动态评价研究——以贵阳市为例
- Title:
- Dynamic Assessment on Land Ecological Security in the Process of Urbanization in Mountain Areas—A Case Study of Guiyang City
- 分类号:
- X171.1
- 摘要:
- 为促进其土地资源可持续利用及其未来生态环境质量改善和生态安全规划管理提供依据，对贵阳市近20 a来的土地资源生态安全状况进行动态评价研究。基于P-S-R模型构建城市化驱动力下土地生态安全评价指标体系，采用多指标综合评价法计算土地资源生态安全水平，利用SPSS软件和GM（1，1）模型进行相关性分析与短时间序列预测。结果表明：近20 a贵阳市土地生态安全指数1992—2000年处于恶化级、2001—2009年处于风险级、2010—2011年处于敏感级，总体呈波动上升趋势，但基本处于不安全状态；人类社会经济活动的响应对土地资源生态安全的影响较大；预测在2011年后5 a内该区域压力值、状态值、响应值和综合值均呈上升趋势，土地生态环境良性循环发展潜力具大，但生态系统脆弱且敏感性显著等问题一直存在。控制人口增长，优化人口结构，加快转型发展，构建绿色经济生态体系，统筹城乡协调发展，优化合理利用土地，探索节约集约用地的新型城镇化模式，加大环境保护力度，建立生态补偿机制是保护贵阳市土地资源生态安全的合理性对策。
- Abstract:
- According to a dynamic state evaluation on ecological security of land resources around 20 years in Guiyang city, this paper aimd at improving the ecological environment and providing guidance for planning and management and maintaining sustainable utilization of land resources. Land ecological security evaluation index system of Guiyang city under the background of urbanization based on the PSR model was constructed. The multi-index comprehensive evaluation method was adopted to calculate the level of ecological security of land resources. SPSS statistic software and GM(1,1) model were used to make correlation analysis and short time series estimation. Nearly 20 years, the index of land ecological security in Guiyang city was in the grade of deterioration from 1992 to 2000, at risk level from 2001 to 2009 and sensitive stage from 2010 to 2011. Although the land ecological security index was a rising trend generally, almost at the stage of insecurity ; correlation analysis showed that the response from the social and economic activities of human beings had a great impact on ecological environment of land resources; the prediction showed that the pressure-state-response value and comprehensive value of ecological security of land resources presented a rising trend in 5 years after 2011, there has been a large potential development on good circulation of land eco-environment. Nevertheless, this study area ecosystem is significantly vulnerable and sensitive. Some kinds of reasonable measures were adopted to protect the land ecological environment, such as controlling the population growth, optimizing social population structure, accelerating the upgrade of industrial transformation, constructing green economic system, making overall plan for the coordinate development of town and city, exploreing conservation intensive land use patterns under the new-type urbanization vigorously. Enlarging protection environment and establishing an ecological compensation mechanism are the very urgent task to ensure the ecological security of land resources.
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备注/Memo
收稿日期:2013-09-27;改回日期:2013-11-17。
基金项目:贵州省科技厅社发攻关项目（黔科合SY字[2013]3168号）
作者简介:熊勇(1987-),男,贵州正安人,在读硕士研究生,研究方向:城市生态及土地利用。E-mail:893895014@qq.com
通讯作者:赵翠薇(1968-),女(白族),贵州大方人,教授,博士后,主要从事土地利用与生态环境保护研究。E-mail:zhaocuiwei@sohu.com