基于源-汇理论和最小累积阻力模型的城市生态安全格局构建——以安徽省宁国市为例

发布时间：2018-03-01 03:25

  本文关键词： 城市生态安全格局 源汇理论 最小累积阻力模型 宁国市　出处：《环境科学学报》2016年12期 　论文类型：期刊论文

【摘要】：根据景观生态学相关理论,选取高程、坡度、土地利用类型、植被覆盖度、土壤侵蚀、距风景名胜区距离、距水体距离、距道路距离、距居民点距离、距工业用地距离、距矿点距离等11个生态安全评价因子,应用GIS空间分析技术对安徽省宁国市生态安全等级进行划分,并采用基于源汇理论的最小累积阻力(MCR)模型构建宁国市生态廊道和生态节点,优化生态网络布局.模拟结果表明,宁国市总体生态安全水平较高,高度安全的区域面积为1174.38 km2,占区域总面积的48.41%;低度安全的区域面积为232.07 km2,占区域总面积的9.57%;在生态安全评价的基础上,提取了宁国市88条潜在生态廊道,总长度约1426.99 km,生态节点57个.与现有生态廊道相比较,宁国市需进一步补充11条主要生态廊道,总长度约241.37 km,这对城市生态安全保护具有重要的意义.
[Abstract]:According to the theory of landscape ecology, height, slope, land use type, vegetation coverage, soil erosion, distance from scenic area, water body, road, residential area, industrial land, etc. By using the GIS spatial analysis technique, the ecological security grade of Ningguo City in Anhui Province was divided into 11 ecological security evaluation factors, such as distance from the mine site. The minimum cumulative resistance (MCR) model based on the theory of source and sink is used to construct ecological corridors and ecological nodes in Ningguo to optimize the ecological network layout. The simulation results show that the overall ecological security level of Ningguo City is high. The area of high safety is 1174.38 km ~ 2, accounting for 48.41% of the total area, while the area of low degree is 232.07 km ~ 2, accounting for 9.57% of the total area. 88 potential ecological corridors of Ningguo City were extracted on the basis of ecological security evaluation. The total length is about 1426.99 km and the ecological node is 57. Compared with the existing ecological corridor, Ningguo city needs to further supplement 11 main ecological corridors, the total length of which is about 241.37 km, which is of great significance to the protection of urban ecological security.
【作者单位】： 中国环境科学研究院;中国城市规划设计研究院;
【基金】：环境保护部重大专项~~
【分类号】：X826;X321
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本文编号：1550204