PROGRESS IN GEOGRAPHY ›› 2019, Vol. 38 ›› Issue (8): 1159-1170.doi: 10.18306/dlkxjz.2019.08.005

• Special Column: Watershed Geography • Previous Articles     Next Articles

Theory and application of aquatic ecoregion delineation in lake-basin

GAO Jungfeng,GAO Yongnian,ZHANG Zhiming   

  1. Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China
  • Received:2019-02-18 Revised:2019-06-11 Online:2019-08-25 Published:2019-08-25
  • Supported by:
    Major Science and Technology Program for Water Pollution Control and Treatment(2017ZX07301-001-02)

Abstract:

Spatial differentiation is one of the core research directions of geography. Aquatic ecoregion delineation is the development and application of geographic regionalization in the field of ecological environment. Management based on aquatic ecoregions is the trend of water environmental management in watersheds. Aquatic ecoregion is the foundation of future water environmental management in China. Existing work cannot meet the technical requirements of water quality management for aquatic ecosystem protection. Based on the analysis of the main concepts involved in aquatic ecoregion, this study analyzed the scale of aquatic ecosystem in lake-basins, and laid a theoretical foundation for the delineation of aquatic ecoregion system in lake-basins. Taking the Chao Lake Basin as an example, the method was used to delineate the aquatic ecoregion at four levels, and the results were validated. Aquatic ecoregion delineation of lake-basin is helpful for enriching the study of spatial differentiation of geographical regions, and has important implications for advancing the theory and methods of aquatic ecosystem target management.

Key words: lake-basin, aquatic ecoregion, levels, scale, Chao Lake Basin