Yang Yanping,Gan Xiaoyu,Wu Xiao.Study on the construction of ecological security pattern in Minjiang River Basin based on circuit theory[J].Research of Soil and Water Conservation,2025,32(02):263-275.[doi:10.13869/j.cnki.rswc.2025.02.040]
基于电路理论的岷江流域生态安全格局构建研究
- Title:
- Study on the construction of ecological security pattern in Minjiang River Basin based on circuit theory
- 文章编号:
- 1005-3409(2025)02-0263-13
- Keywords:
- ecological security pattern; ecological restoration; circuit theory; ecosystem services; geological disaster sensitivity; Minjiang River Basin
- 分类号:
- X171.4
- 文献标志码:
- A
- 摘要:
- [目的]精准提取各生态空间要素,构建生态安全格局,维持流域生态系统的健康稳定及生态环境保护的可持续发展。[方法]以岷江流域为研究区,评估其生态系统服务重要性以筛选生态源地,通过地质灾害敏感性评价修正土地利用基本阻力面,并基于电路理论,量化识别廊道、夹点、障碍点等生态空间要素,构建生态安全格局。[结果](1)面积阈值设定为7 km2时,筛选出生态源地77个,面积占比为30.77%,关键生态源地主要在“龙门—邛崃山脉”及其以北的岷山中南段雪宝顶等林地区,以及岷江中下游的部分耕地和林地。(2)生态廊道共176条,总长度2 072.96 km,关键生态廊道总长度占比为21.32%,集中在岷江中游; 生态夹点共719处,总面积1 578.5 km2; 生态障碍点163处,总面积2 410 km2。(3)构建“四区两带一廊”的岷江流域生态安全格局,并以岷江乡为例,探索了岷江流域“全流域—局域单元”生态空间协同修复路径。[结论]生态修复时要考虑多尺度格局的衔接与融合,实行系统性、差异化的生态空间分区治理,提升生态景观连通性及生境质量,促进物质流通。
- Abstract:
- [Objective]This study aims to accurately extract various ecological spatial elements and construct an ecological security pattern, to maintain the health and stability of river basin ecosystems, and to promote the sustainable development of ecological environmental protection. [Methods]The Minjiang River Basin was taken as the study area where the significance of ecosystem services was assessed to select ecological sources. The basic resistance surface of land use was modified through the evaluation of geological disaster sensitivity. Ecological spatial elements such as corridors, pinch points, and barrier points were quantitatively identified based on circuit theory to construct the ecological security pattern. [Results](1)With the area threshold established at 7 km2, 77 ecological sources were selected, accounting for 30.77% of the total area. The key ecological sources were mainly located in the forested areas of the ‘Longmen-Qionglai Mountains' and the southern-central segment of the Minshan Mountains to the north, including Xuebaoding, as well as part of cultivated land and forested land in the middle and lower reaches of the Minjiang River Basin.(2)A total of 176 ecological corridors were identified, with a combined length of 2 072.96 km, of which the key ecological corridors accounted for 21.32% of the total length and were primarily concentrated in the middle reaches of the Minjiang River Basin. There were 719 ecological pinch points covering an area of 1 578.5 km2, and 163 ecological barrier points spanning an area of 2 410 km2.(3)The ecological security pattern characterized by ‘four zones, two belts, and one corridor' had been established for the Minjiang River Basin. Minjiang Township was taken as an example. A collaborative ecological spatial restoration approach for the ‘whole watershed-local unit' within the Minjiang River Basin had been explored. [Conclusion]In the context of ecological restoration, emphasis should be placed on the integration and convergence of multi-scale patterns. And a systematic and differentiated approach to ecological spatial zoning governance should be implemented to enhance ecological landscape connectivity and habitat quality, and to facilitate the circulation of materials.
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备注/Memo
收稿日期:2024-08-08 修回日期:2024-09-05 接受日期:2024-09-20
资助项目:国家重点研发计划项目“西南民族村寨防灾技术综合示范”(2020YFD1100700)
第一作者:杨艳萍(2000—),女,湖北宜昌人,硕士研究生,研究方向为城市生态规划等。E-mail:yangyp0806@163.com
通信作者:吴潇(1983—),男,河南信阳人,副教授,博士,研究方向为城市区域规划等。E-mail:wuxiao1012@scu.edu.cn