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Author:

Du, Yueyue (Du, Yueyue.) | Peng, Jian (Peng, Jian.) | Zhao, Shiquan (Zhao, Shiquan.) | Hu, Zhichao (Hu, Zhichao.) | Wang, Yanglin (Wang, Yanglin.)

Indexed by:

EI Scopus PKU CSCD

Abstract:

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.

Keyword:

Risk assessment Soil conservation Disaster prevention Watersheds Disasters Water conservation Ecosystems Rivers Landslides Hazards Geology Food supply Damage detection

Author Community:

  • [ 1 ] [Du, Yueyue]Laboratory for Earth Surface Process, College of Urban and Environment Sciences, Peking University, Beijing; 100871, China
  • [ 2 ] [Peng, Jian]Laboratory for Earth Surface Process, College of Urban and Environment Sciences, Peking University, Beijing; 100871, China
  • [ 3 ] [Peng, Jian]School of Urban Planning and Design, Shenzhen Graduate School, Peking University, Shenzhen; Guangdong; 518055, China
  • [ 4 ] [Zhao, Shiquan]School of Urban Planning and Design, Shenzhen Graduate School, Peking University, Shenzhen; Guangdong; 518055, China
  • [ 5 ] [Zhao, Shiquan]Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong
  • [ 6 ] [Hu, Zhichao]Laboratory for Earth Surface Process, College of Urban and Environment Sciences, Peking University, Beijing; 100871, China
  • [ 7 ] [Hu, Zhichao]College of Architecture and Urban Planning, Beijing University of Technology, Beijing; 100124, China
  • [ 8 ] [Wang, Yanglin]Laboratory for Earth Surface Process, College of Urban and Environment Sciences, Peking University, Beijing; 100871, China

Reprint Author's Address:

  • [wang, yanglin]laboratory for earth surface process, college of urban and environment sciences, peking university, beijing; 100871, china

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Source :

Acta Geographica Sinica

ISSN: 0375-5444

Year: 2016

Issue: 9

Volume: 71

Page: 1544-1561

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 35

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 14

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