Acta Geographica Sinica ›› 2003, Vol. 58 ›› Issue (4): 519-526.doi: 10.11821/xb200304005

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Exploration of Eco-environment Range in the Source Regions of the Yangtze and Yellow Rivers

DING Yongjian, YANG Jianping, LIU Shiyin, CHEN Rensheng, WANG Genxu, SHEN Yongping, WANG Jian, XIE Changwei, ZHANG Shiqiang   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China
  • Received:2002-08-29 Revised:2003-01-16 Online:2003-07-25 Published:2003-07-25
  • Supported by:

    Knowledge Innovation Project of CAS, No.KZCX1-10-06

Abstract:

On the basis of geographical and hydrological ranges definition, four principles are determined, which are the foundation for deciding the extents of the source regions of the Yangtze and Yellow rivers, in this paper. Under the comprehensive analysis of topographical characteristics, climate conditions, vegetation distribution and hydrological features, ranges of the source regions of eco-environment study are defined. The Dari hydrological station is the eastern boundary point of the source region of the Yellow River which drains an area of 4.49×104 km2. The eastern boundary point is the convergence point of the Nieqia and the Tongtian rivers in the source region of the Yangtze River, which drains an area of 12.24×104 km2.

Key words: the source regions of the Yangtze and Yellow rivers, eco-environment, extent