Ecological risk resonance of urbanization and its effect on geohazard disaster: the case of Freetown, Sierra Leone
文献类型：期刊论文
| 作者 | Jin, Wen2,3,4; Cui, Yifei1; Wu, Shengnan4,5; Cheng, Deqiang2,4 |
| 刊名 | URBAN ECOSYSTEMS
 |
| 出版日期 | 2020-04-01 |
| 页码 | 12 |
| 关键词 | Ecological risk Urban expansion Forest degeneration Trend analysis Mountain area Freetown |
| ISSN号 | 1083-8155 |
| DOI | 10.1007/s11252-020-00989-1 |
| 通讯作者 | Cui, Yifei(yifeicui@mail.tsinghua.edu.cn) |
| 英文摘要 | Land use changes associated with urbanization may increase ecological risk and subsequent geohazard risk. Africa is particularly vulnerable at preset as, since 2005, the highest rates of rapid urbanization-associated forest degradation have occurred there. On August 14, 2017, a compound geohazard in Freetown, Sierra Leone, caused thousands of fatalities and destroyed hundreds of houses. Land use change is considered the main factor contributing to geohazard initiation. Here, we use Freetown as a case study to quantitatively assess the magnitude of the increase in ecological risk associated with land use changes. To achieve the aim, satellite images are used in the case study area from 2007 to 2017, the data are integrated into a geographic information system. A series of indices are then used based on the processed images to describe land use and ecological risk, including dynamic index, trend and state index, and ecological risk index. The results show that Freetown experienced a rapid urbanization process, together with an unbalanced increase in urban land and complex conversion of bare and grass land, from 2007 to 2017. Significantly degenerated forest was converted into urban land (2.77%), bare land (6.47%), and grassland (10.27%), while the ecological risk level increased from low to high. The ecological risk in the affected area of geohazard is found higher than that of the surrounding mountainous area. It indicates that vegetation may reduce the risk of disaster. This result is helpful for the trade-off between urban development and ecological protection and rational urban planning. For disaster resilience and sustainable development of Freetown, and also other rapidly urbanizing cities in mountainous areas, ecological protection must be incorporated into development planning. |
| WOS关键词 | LAND-COVER CHANGE ; HURST EXPONENT ; LANDSCAPE ; RIVER ; SOIL ; INDEXES ; BASIN ; LANDSLIDES ; XINJIANG ; PLATEAU |
| 资助项目 | National Natural Science Foundation of China[41941019] ; Major Program of National Natural Science Foundation of China[41790432] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-DQC006] ; Sichuan Science and Technology program[2019YFH0040] |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology ; Urban Studies |
| 语种 | 英语 |
| WOS记录号 | WOS:000522902400001 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China ; Major Program of National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Sichuan Science and Technology program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/133402]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Cui, Yifei |
| 作者单位 | 1.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Wen,Cui, Yifei,Wu, Shengnan,et al. Ecological risk resonance of urbanization and its effect on geohazard disaster: the case of Freetown, Sierra Leone[J]. URBAN ECOSYSTEMS,2020:12. |
| APA | Jin, Wen,Cui, Yifei,Wu, Shengnan,&Cheng, Deqiang.(2020).Ecological risk resonance of urbanization and its effect on geohazard disaster: the case of Freetown, Sierra Leone.URBAN ECOSYSTEMS,12. |
| MLA | Jin, Wen,et al."Ecological risk resonance of urbanization and its effect on geohazard disaster: the case of Freetown, Sierra Leone".URBAN ECOSYSTEMS (2020):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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