Quantifying and characterizing the dynamics of urban greenspace at the patch level: A new approach using object-based image analysis
文献类型：期刊论文
| 作者 | Qian, Yuguo; Wang, Jing ; Zhou, Weiqi; Li, Weifeng; Han, Lijian
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| 刊名 | REMOTE SENSING OF ENVIRONMENT
 |
| 出版日期 | 2018 |
| 卷号 | 204页码:94-108 |
| 关键词 | Urban greenspace Patch dynamic Object-based image analysis Ecosystem services Beijing |
| ISSN号 | 0034-4257 |
| 文献子类 | Article |
| 英文摘要 | Accurate and quantitative description of spatial pattern of urban greenspace and its change over time is crucial for understanding ecosystem service provision and urban sustainability. Patches are the basic management and planning units in urban landscapes, and urban designers and planners and natural resource managers frequently seek tools to understand changes at the patch level. High spatial resolution imagery has been increasingly used to measure fine-scale changes of percent cover of urban greenspace. However, few studies have investigated the dynamics of urban greenspace at the patch level, to quantify the process of growth, shrinking, or disappearance of patches. Here, we developed a new approach to quantify and characterize urban greenspace change at the patch level, by implementing object-based image analysis. We used2.5 m resolution ALOS and SPOT image data captured in 2005 and 2009, and tested the new approach in Beijing, China. With this approach, we identify different types of change in patches of urban greenspace, such as expansion and shrinking, newly created, and totally lost, in addition to gain and loss information. The results show: 1) 9.25% of the total area (6179 ha) was generated from expansion of extant patches, while 5.36% (3582 ha) was lost due to shrinking of patches; 2) 0.91% (607 ha) of urban greenspace was totally removed, and 1.23% (821 ha) was newly created; and 3) Urban greenspace with different ranges of patch size, from 0.01 to 1000 ha, all experienced large changes, with a tendency for small-sized patches (< 1 ha) to be totally removed. This new approach provides an effective tool for better understanding changes of urban greenspace, and results from this study provide important insights for planners and managers to devise target-specific measures and plans to more effectively protect urban green space. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40634]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Qian, Yuguo,Wang, Jing,Zhou, Weiqi,et al. Quantifying and characterizing the dynamics of urban greenspace at the patch level: A new approach using object-based image analysis[J]. REMOTE SENSING OF ENVIRONMENT,2018,204:94-108. |
| APA | Qian, Yuguo,Wang, Jing,Zhou, Weiqi,Li, Weifeng,&Han, Lijian.(2018).Quantifying and characterizing the dynamics of urban greenspace at the patch level: A new approach using object-based image analysis.REMOTE SENSING OF ENVIRONMENT,204,94-108. |
| MLA | Qian, Yuguo,et al."Quantifying and characterizing the dynamics of urban greenspace at the patch level: A new approach using object-based image analysis".REMOTE SENSING OF ENVIRONMENT 204(2018):94-108. |
入库方式： OAI收割
来源：生态环境研究中心
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