基于灾变理论的盐城市土地生态安全评价研究  

ASSESSING LAND ECOLOGICAL SECURITY IN YANCHENG CITY BASED ON CATASTROPHIC THEORY

作　　者：王亮[1,2,3] 卞正富[1] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州220082 [2]盐城师范学院城市与资源环境学院,江苏盐城224051 [3]江苏沿海开发研究院,江苏盐城224051

出　　处：《长江流域资源与环境》2014年第2期231-236,共6页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金项目(41071083);江苏省高校优势学科建设工程项目(SZBF2011-6-B35);江苏省资源环境信息工程重点实验室基金项目(JS201110);盐城师范学院校级科研项目(11YCKL005)

摘　　要：土地生态安全关系到区域的可续发展。以压力一状态响应模型与灾变理论相结合，根据盐城市的土地利用特点，分别从社会、经济和生态环境方面构建土地生态安全评价指标体系，分析盐城市2002～2011年的土地生态安全变化情况，找出其中的问题，能为盐城市土地利用可持续发展提供理沦依据和参考价值。研究表明：盐城市土地利用生态安全等级除了2003年和2007年为安全等级外，其余8a均为中等安全、不安全和极不安全等级，而且基本呈逐年下降趋势；人口、环保投入和城镇化是导致盐城市土地利用生态安全等级下降的重要影响因素，这种现实状况应该引起政府相关决策部门的高度重视，最后提出了几点建议。Land is the foundation ofglobal survival and development. Land ecological security is related to regional sustainable development. The land ecosystem plays a very important role in social-economic progress at regional, national, and international scale. The land ecosystems of Yancheng city have become highly stressed and dysfunctional due to the continuous, excessive exploitation and utilization of land resources. In this regard, there is considerable need for methods and indicators to diagnose the state of land ecosystem for prompting ecological restoration, management and regulation. A catastrophic model for land ecological security assessment combined with the pressure-state-response （PSR） model framework was developed in this paper to overcome the disadvantages in subjectivity and complexity of the currently used assessment methods. Based on the actual land use in Yancheng city, the paper established the ecological security of land index system from perspectives of economy, society and ecological environment. The catastrophic assessment index system was divided into hierarchical sub-systems under the pressure- state-response framework. The catastrophe model integrated multiple assessment indices of land ecological security according to the inherent contradictions and relative importance of indices without calculating weights. Specifically, membership degree of higher level index was calculated based on the membership degrees of lower level indices that were subjective to suitable model, such as cusp, fold, swallowtail and butterfly model. The purpose of this paper is to judge the degree of land ecological security in Yancheng city from 2002 to 2011 via catastrophic theory and PSR model and find the inherent issues to make sure of sustainable development of this region. The results showed that among the ten years, the value of pressure, state, response and synthetic about land ecological security was evaluated as safe in the year o~ 2003 and 2007, then in the year of 2002 and during 2004--2006 was at middl

关 键 词：土地生态安全 评价 灾变理论 盐城市 

分 类 号：X913[环境科学与工程—安全科学]