郑州市国土空间生态修复的关键区域识别

Identification of Critical Areas for Ecological Restoration of Territorial Space in Zhengzhou City

[目的]对郑州市国土空间生态修复关键区域识别,为该市和市域国土空间生态修复规划提供科学参考。[方法]利用形态学空间格局分析(MSPA)识别生态源地,通过景观连通性评价与电路理论提取生态廊道、识别生态修复关键区域,最终构建生态网络安全格局。[结果]郑州市生态源地共37个,面积共计983.29 km^(2),呈现西多东少,南北呈带状聚拢分布;提取郑州市85条生态廊道,廊道长度为0.11~47.92 km,共计689.50 km,其中关键生态廊道19条、重要生态廊道29条、一般生态廊道37条;识别生态夹点55处,总面积2.78 km^(2),多集于郑州市西南部,夹点所处位置阻力较小,土地类型主要以林地、草地、水体为主;将累计电流值划分3种等级障碍点,总面积为1054.31 km^(2),占研究区面积的14.16%,主要位置在登封市与新密市主要交通道路周围的城镇区域;综合考虑研究区自然与社会现状,提出“一带,一环,两区,四团,多点”的生态网络安全格局。[结论]对识别的生态夹点与障碍点分别提出修复策略:生态夹点区域生态环境较好,因此以自然生态维护为主;生态障碍点区域主要为建设用地,开发强度较大,受人类干扰程度较多,因此以人工和自然修复并重的方式为主。

[Objective]The key areas of territorial ecological restoration in Zhengzhou City were identified to provide a scientific reference for the planning of territorial ecological restoration in Zhengzhou City.[Methods]Morphological spatial pattern analysis(MSPA)was used to identify ecological source areas,to extract ecological corridors,and to identify key areas for ecological restoration through landscape connectivity assessment and circuit theory,and finally to construct an ecological network security pattern.[Results]There were a total of 37 ecological source areas in Zhengzhou City,covering a total area of 983.29 km^(2),with a distribution pattern characterized as more in the west and less in the east,with a band-like agglomeration in the north-south direction.A total of 85 ecological corridors were extracted in Zhengzhou City,with lengths ranging from 0.11 to 47.92 km,totaling 689.50 km.Among these,there were 19 key ecological corridors,29 important ecological corridors,and 37 general ecological corridors.Fifty-five ecological pinch points were identified,with a total area of 2.78 km^(2),mainly concentrated in the southwest part of Zhengzhou City.The locations of these pinch points had less resistance,and the main land use types were forests,grasslands,and water bodies.Three levels of obstacle points were classified based on cumulative current values,with a total area of 1054.31 km^(2),accounting for 14.16%of the study area.These obstacle points were mainly located in urban areas around major transportation roads in Dengfeng City and Xinmi City.Considering the natural and social status of the study area,a“one belt,one ring,two zones,four groups,and multiple points”ecological network security pattern was proposed.[Conclusion]The following strategies for ecological restoration were proposed for the identified ecological pinch points and obstacle points:the ecological pinch point areas have relatively good ecological environments,so natural ecological maintenance should be the main focus.The obstacle point areas are mainly construction land with high development intensity and human disturbance,therefore both artificial and natural restoration should be given equal importance.