Ecological Risk Assessment of Longnan Mountainous Area Based on Geological Disasters——A Case Study of Wudu
详细信息
- 责任者：Gong Jie (Research School of Arid Environment and Climate Change ; Lanzhou University ; Lanzhou 730000 ; China) ; Zhao Caixia
- 刊名：Journal of Mountain Research
- 出版年：2012
- 卷期：30(5)
- 关键词：生态环境 ; ecological environment ; 风险分析 ; risk analysis ; 甘肃 ; Gansu Province
- 页码：p.570-577
- 图表：3 illus., 2 tables, 27 refs.
- 分类号：1800
- issnNo：ISSN1008-2786
- isbnNo：CN51-1516/P
摘要
Longnan mountainous area was famous for its intensive geologic structure activity and frequent geo-disasters which caused loss and threatening the local fragile ecological environment and security.In this paper,typical geological disasters(debris flow,landslide and earthquake) in Wudu and 6 landscape types(forestland,farmland,grassland,water area,constructed and residential land,unused land) were selected as risk sources and receptors separately,landscape pattern index and vulnerability index were considered as indicator for an ecological risk assessment model to evaluate the ecological risk of Wudu.The results showed that:1) the distribution of ecological risk levels was mainly caused by the risk distribution of geological disasters and landscape patterns.2) human activities,vegetation coverage and elevation also affect risk distribution.3) the extreme high and high risk areas distributed mainly in the south coast area of Bailongjiang river and east part of Dongjiang town along Bailongjiang river,and partly in Anhua,Majie,Hanwang and north of Liangshui;while the lower and low risk areas scattered primarily in the east and south of Wudu and partly in the west and northwest of Wudu.Ecological risk assessment with multi-risk source and landscape pattern can be very useful for regional ecological risk management and environmental protection.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |