Green Infrastructure-Based Ecological Resilience in Urban Systems: A Perspective from Locating Ecological and Disturbing Sources in a Mining City
Posted: 31 Jul 2019
Date Written: June 25, 2019
Mining activities bring huge benefits to the regional economy, but accompanied by a series of environmental issues such as habitat fragmentation of animals and humans. As an effective regulator for mitigating urban environmental deterioration, the urban green infrastructure is of great significance for ensuring local ecological security and maintaining spatial sustainability. Taking Wu’an as a study case, a mining city in China, this paper establishes two index systems of ecological sources for presenting ecological resilience in urban systems, including polygons and lines, which are then matched with the urban green infrastructure. Then this paper establishes the models for measuring and grading the ecological resilience in this kind of urban systems at the scales of spatial elements and grid cells. The results indicate that (1) the polygonal ecological resilience is responded to land use types differently, characterized by locating weaker polygonal ecological resilience in and surrounding built-up and mining areas, which further causes an increase of patch fragmentation, and that (2) the linear ecological resilience is close to the patch fragmentation and has the similar disturbance caused by built-up and mining areas, but the local river ensures the integrity of ecological networks, which plays a very important role in improving the ecological resilience in urban systems, and that (3) the combined ecological resilience in the study area varies from space, which is jointly decided by geographical conditions, mineral locations and human activities. The significant achievement in our paper is that the mineral extraction-driving urbanization and industrialization in a mining city may cause a more drastic change of ecological resilience than other urban systems.
Keywords: Land use, Urban reslience, Green infrastructure
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