摘要
岷江流域从地理单元上横跨川西北丘状高原山地区、成都平原区、盆中丘陵区和川西南山地区,涵盖了森林、草地、湿地等多种类型,生态结构复杂,生态系统完整。以岷江地区为例,基于景观生态学理论和GIS技术,综合运用生境质量模型,结合流域生态系统服务功能重要性,根据粒度反推法提取生态源地;依据景观类型、流域生态系统服务功能风险性和地形因子构建最小阻力面模型;采用电流电路理论和生物物质流动模型构建研究区生态修复重点区域识别模型。最终识别得到生态源地面积7111.32 km^(2),占研究区总面积的22.23%;生态廊道总长3713.62 km,沿岷江水系分布明显;结合国内生产总值对区域内断裂点分级得到待修复的生态断裂点共36处,其中四级断裂点5个,综合识别得到沿岷江干流分布区宏观生态安全格局,为岷江流域自然资源合理分配提供科学指导,为生态修复工作提供理论依据。
Geographically,the Minjiang River Basin spans the hilly plateau mountainous area in northwest Sichuan,the Chengdu plain area,the hilly area in the basin,and the mountain area in southwestern Sichuan.It covers various types of forests,grasslands,and wetlands.The ecological structure is complex and the ecosystem is complete.Based on the theory of landscape ecology and GIS technology,the habitat quality model is comprehensively used.Combined with the importance of watershed ecosystem service function,and the ecological source is inversely selected according to the granularity backstepping method.From the landscape type,ecosystem service risk and terrain factors,the slightest resistance surface model is constructed.The current circuit theory and bilateral flow model are used to build the identification model of ecological restoration in the study area.The identified ecological source area is 7111.32 km^(2),accounting for 22.23%of the total area of the study area.The total length of ecological corridor is 3713.62 km,which is obviously distributed along the wetlands in the basin.Combined with GDP,36 ecological fracture points are classified,including 5 fourth grade fracture points.The macro ecological security pattern along the main stream of Minjiang River obtained by comprehensive identification can provide scientific guidance for the rational allocation of natural resources in Minjiang River basin and a theoretical basis for ecological restoration.
作者
方国政
薛东剑
陈晓杰
方坤
FANG Guo-zheng;XUE Dong-jian;CHEN Xiao-jie;FANG Kun(College of Geosciences,Ministry of Land and Resources,Chengdu University of Technology,Chengdu 610059,China;Key Laboratory of Geospatial Information Technology,Ministry of Land and Resources,Chengdu University of Technology,Chengdu 610059,China;Sichuan Water Conservancy Vocational and Technical Chengdu 611231,China;Sichuan Institute of Land Science and Technology,Chengdu 610045,China)
出处
《桂林理工大学学报》
CAS
北大核心
2022年第1期151-159,共9页
Journal of Guilin University of Technology
基金
四川省科技计划项目(2019YJ0505)
国家重点研发计划项目(2018YFC0706003-1)。
关键词
生境质量
生态安全格局
阻力面
生态系统服务功能
生态断裂点
habitat quality
ecological security pattern
resistance surface
ecosystem service function
ecological break point
