Acta Geographica Sinica ›› 2015, Vol. 70 ›› Issue (11): 1747-1761.doi: 10.11821/dlxb201511005

• Orginal Article • Previous Articles     Next Articles

Integrated ecological risk assessment and spatial development trade-offs in low-slope hilly land: A case study in Dali Bai Autonomous Prefecture, China

Jian PENG(), Pan XIE, Yanxu LIU, Xiaoxu HU   

  1. Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
  • Received:2015-04-26 Revised:2015-08-28 Online:2015-11-20 Published:2015-11-20
  • Supported by:
    The Commonwealth Project of the Ministry of Land and Resources, No.201311001-2

Abstract:

Low-slope hilly land is one of the most important construction and development resources in China, where hilly area is much more than the flat ground. The construction process can be very difficult as the complex terrain and sensitive eco-environment of the hilly land, where eco-environmental problems may take place due to unreasonable human development. An ecological risk assessment conceptual framework of low-slope hilly land has been built by taking account of natural ecological risk probability, development ecological risk probability as well as ecological importance. In detail, natural ecological risk probability contains geological disaster stress and soil erosion stress, while the development ecological risk consists of pollution accumulated stress, resource depletion stress and space occupation stress. Then a conceptual framework has been applied in the ecological risk assessment of Dali Bai Autonomous Prefecture, a representative region of low-slope hilly city construction areas in Yunnan Province, China. In this study, firstly, the quantitative and spatial patterns of the influence factors were analyzed separately and then the integrated ecological risk probability was graded into 5 degrees. Secondly, the spatial pattern of integrated ecological risk and its relationship with land use types has been analyzed. Finally, 383 watersheds were classified into four categories, namely development priority area, protection priority area, development balance area and protection balance area according to the grade of integrated ecological risk and grade of development status. The guidance and advice for future development has also been proposed for low-slope hilly construction in Dali Prefecture.

Key words: integrated ecological risk assessment, construction of low-slope hilly area, watershed development trade-offs, Dali Bai Autonomous Prefecture