Ecological risk assessment of landslide disasters in mountainous areas of Southwest China: A case study in Dali Bai Autonomous Prefecture

被引：0
|
作者：
Du Y. [1 ]
Peng J. [1 ,2 ]
Zhao S. [2 ,3 ]
Hu Z. [1 ,4 ]
Wang Y. [1 ]
机构：
[1] Laboratory for Earth Surface Process, College of Urban and Environment Sciences, Peking University, Beijing
[2] School of Urban Planning and Design, Shenzhen Graduate School, Peking University, Shenzhen, 518055, Guangdong
[3] Department of Geography and Resource Management, The Chinese University of Hong Kong
[4] College of Architecture and Urban Planning, Beijing University of Technology, Beijing
来源：
Dili Xuebao/Acta Geographica Sinica | 2016年 / 71卷 / 09期
关键词：
Dali Bai Autonomous Prefecture; Ecological potential damage; Ecological risk of landslide disasters; Ecological vulnerability; Geological hazard; Risk prevention and governance;
D O I：
10.11821/dlxb201609007
中图分类号：
学科分类号：
摘要：
Taking Dali Bai Autonomous Prefecture as an example, the study assesses ecological risk of landslide geological disasters in terms of risk stressors, risk receptors, exposure and response process, and ecological end points. To be specific, firstly, the information method is used to evaluate the hazard of landslide disasters. Secondly, ecological vulnerability is evaluated based on landscape pattern metrics. Thirdly, the potential ecological damage of the study area is identified according to the ecosystem service assessment. Finally, the ecological risk of landslide disasters is comprehensively evaluated, and the partitions of risk precaution and governance are distinguished. The results show that, (1) 10 aspects including geography, geology and human activity factors, such as elevation less than 1800 m, slope within 15°-25°, NDVI less than 0.31, are the best information combination for inducing landslide geographical disasters in Dali Prefecture. As to the hazard of landslide geological disasters, the whole Dali prefecture is generally at medium and high risk levels of landslide and debris flow disasters. And the risk of northwest is lower than that of southeast; (2) the areas with high ecological vulnerability are mainly concentrated in the south of the Red River watershed, southeast of the Jinsha River watershed and the central part of the Lancang River watershed. Watersheds with low ecological damage have relatively poor water conservation service and food supply service. Watersheds with medium ecological damage have obvious advantage in providing net primary production and soil conservation service. Watersheds with high ecological damage would have relatively strong food supply and water conservation service; (3) the ecological risk of landslide disasters in Dali Prefecture presented 3 levels and 8 types of risk structures. Then 367 small watersheds were divided into 4 partitions of risk prevention and governance strategies, i.e., risk avoidance and warning areas, ecological protection and restoration areas, risk avoidance as well as ecological protection areas, and natural adaption areas. © 2016, Science Press. All right reserved.
引用
收藏
页码：1544 / 1561
页数：17
相关论文
共 47 条
  • [1] Peng J., Liu Y., Pan Y., Et al., Study on the correlation between ecological risk due to natural disaster and landscape pattern-process, Advances in Earth Science, 29, 10, pp. 1186-1196, (2014)
  • [2] Peng J., Dang W., Liu Y., Review on landscape ecological risk assessment, Acta Geographica Sinica, 70, 4, pp. 664-677, (2015)
  • [3] Liu Y., Wang Y., Peng J., Et al., Urban landscape ecological risk assessment based on the 3D framework of adaptive cycle, Acta Geographica Sinica, 70, 7, pp. 1052-1067, (2015)
  • [4] Wang Y., Meng J., Liu L., Et al., Integrated Risk Governance: Integrated Risk of Ecology and Food Security in China, pp. 6-11, (2011)
  • [5] He W., He Q., Zhou J., Soil weathering-water environment-ecological risks in Hanjiang River Basin, China, Quaternary International, 380-381, pp. 297-304, (2015)
  • [6] Yang L., Wang Z., Jin G., Et al., Geological risk assessment for the rapid development area of the Erhai Basin, Physics and Chemistry of the Earth, (2015)
  • [7] Zaghden H., Kallel M., Elleuch B., Et al., Evaluation of hydrocarbon pollution in marine sediments of Sfax coastal areas from the Gabes Gulf of Tunisia, Mediterranean Sea, Environmental Earth Sciences, 72, 4, pp. 1073-1082, (2014)
  • [8] Messerli B., Grosjean M., Hofer T., Et al., From nature-dominated to human-dominated to human-dominated environmental changes, IGU Bulletin, 50, 1, pp. 23-38, (2000)
  • [9] Rediscovering Geography, (1997)
  • [10] Chang Q., Liu D., Liu X., Ecological risk assessment and spatial prevention tactic of land destruction in mining city, Transactions of the Chinese Society of Agricultural Engineering, 29, 20, pp. 245-254, (2013)
12345