国土空间生态保护修复重点区域识别研究--以宁波市为例

Research on the Identification of Key Areas for Ecological Protection and Restoration:A Case Study on Ningbo City

研究目的:基于生态安全格局识别宁波市国土空间生态保护修复重点区域,并提出保护修复策略。研究方法:构建综合评价体系以确定生态源地,利用电路理论模型识别生态廊道和生态夹点,并引入廊道生态质量评价指标帮助确定各条廊道的合适宽度。研究结果:(1)识别生态源地23处,土地利用类型以林地为主。(2)识别生态廊道38条,廊道宽度集中在12~72 m。(3)宁波市生态廊道按质量分级,一级廊道6条,二级廊道10条,三级廊道22条,总体生态质量有待提高。(4)识别生态夹点区域14.37 km^(2),夹点的分布具有“南少北多、西多东少”的特点。研究结论:该方法识别了宁波市的生态源地、生态廊道及生态夹点,确定了廊道的适宜宽度,为国土空间生态保护修复重点区域识别提供有效的参考路径。

The purpose of the paper is to provide a scientific method to determine the critical areas for ecological conservation in urban areas,to propose targeted protection and restoration strategies.The research methods are to identify the ecological sources based on the comprehensive evaluation system,to extract the ecological corridors and ecological pinch points by using the circuit theory model,and to determine the appropriate width of each corridor by introducing corridor ecological quality evaluation indicators.The results reveal that:1)a total of 23 ecological sources are identified,which should be classified and protected.The land-use type of ecological sources is mainly forest.2)38 potential ecological corridors are identified,and the corridor widths are concentrated at 12~72 m.3)Ningbo ecological corridors are graded according to their quality,with 6 primary corridors,10 secondary corridors and 22 tertiary corridors.The overall ecological quality needs to be improved.4)The total area of the identified ecological pinch points is 14.37 km^(2),mostly distributed in the northeast of Ningbo.In conclusion,the method identifies ecological source,ecological corridors and ecological pinch points in Ningbo relatively quickly,and the distribution of the identified ecological security pattern elements matches the current situation of ecological natural resources and constructs a corridor ecological quality evaluation model to determine the appropriate width of corridors,providing an effective reference path for the optimization of ecological security patterns.