文峪河流域景观安全格局构建与健康度评价

Landscape Security Pattern Construction and Health Assessment of Wenyu River Basin

选取文峪河流域为研究对象,利用GIS等软件综合自然、社会评价因子,从多个角度构建流域景观安全格局,分析流域景观安全格局的结构特征、转移动态、空间分布以及景观安全指数与人口密度、经济总量、生态系统服务的相关性;利用Linkage Mapper软件分析景观源与生态廊道的重要性,从多角度、多因子构建流域健康度评价体系,并分析流域健康格局的结构特征、转移动态、梯度分布、驱动机制,以及健康指数与人口密度、经济总量、生态系统服务的相关关系。研究结果表明,文峪河流域景观安全格局结构特征及转移动态变化复杂,流域景观安全格局结构整体向好,景观安全指数与经济总量、人口密度、生态系统服务之间存在密切的相关关系,不同景观源与生态廊道的生态重要性不同,提出“一带三区三轴多点”的生态框架对景观格局进行优化;文峪河流域健康格局结构特征及转移动态变化复杂,流域健康格局结构向好,城区与林区的健康度梯度不同,健康指数与经济总量、人口密度、生态系统服务之间存在密切的相关关系,不同驱动因子对健康度的驱动作用不同。流域景观安全区面积与景观健康区面积的增加已趋于饱和,应加强对流域的研究与保护,促进流域的可持续发展。

This paper integrated natural and social evaluation factors by GIS and other software to construct the landscape security pattern of Wenyu River basin from multiple perspectives,analyzed the correlation between structural characteristics,transfer dynamics,spatial distribution,landscape security index and population density,economic aggregate and ecosystem services,illustrated the importance of landscape source and landscape ecological corridor by Linkage Mapper,and constructed the evaluation system of watershed health degree from multiple perspectives and factors to analyze the structural characteristics,transfer dynamics,gradient distribution,driving mechanism,as well as the correlation between health index and population density,economic aggregate,ecosystem services.The results showed that the landscape security pattern structure characteristics and transfer dynamic changes in Wenyu River basin were complex,and the overall landscape security pattern structure was better.There was a close relationship between landscape security index and economic aggregate,population density,ecosystem services.Different landscape sources and ecological corridors had different ecological importance.The ecological framework of“one belt,three areas,three axes and many points”was proposed to optimize the landscape pattern.The structural characteristics and dynamic changes of health pattern in Wenyu River basin were complex,the structure of health pattern was good.The gradient of health degree in urban area and forest area was different.There was a close relationship between health index and economic aggregate,population density,ecosystem services.The driving effect of different driving factors on health degree was different.The increase of landscape safety area and landscape health area in the basin had been saturated,so the research and protection should be strengthened to promote the sustainable development of the basin.