摘要
城市生态安全是城市可持续发展的基础。城市土地利用状况在城市化的步伐下发生了巨大的变化,城市不断蚕食边缘区土地而扩大城区,城市用地结构中公共绿地提高,水域面积萎缩,闲置土地多,土壤遭受城市建设破坏和城市垃圾等污染而退化,这些导致城市土壤功能如生产功能、缓冲———净化功能的弱化甚至丧失,从而影响城市边缘区生态系统对城市生态系统缓冲调节功能以及增加了城市水涝风险和城市热岛效应,影响人们的生活环境与健康,也威胁着城市生态系统安全。
Urban eeo-security is the foundation of urban sustainable development. Great change of urban soil use state has taken place under the foot of urbanization. The city was extended by brim land nibbled, and common greenbelt was enhanced, and water area was shrunk, the soil unused was high, land was degraded by pollution under the destruction of construction and garbage, which makes the functions such as product, buffer, purify weaken and lose. To some extent, it makes ecosystem in suburban area buffering capability weaken to urban ecosystem, and the risk of waterlogged in city and hot island effect increased, and people＇s living surroundings and health are effeeted. Those threatened the urban eco-security.
出处
《衡阳师范学院学报》
2006年第6期97-100,共4页
Journal of Hengyang Normal University
基金
湖南省教育厅资助项目(06C193)
湖南省自然科学基金项目(05jj40062)
