Comparison of Spatial Diversity of Land Use Changes and the Inpacts on Two Typical Areas of Heihe River Basin

  • 1. Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China;
    2. Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China;
    3. School of Resource and Environment Science, Lanzhou University, Lanzhou 730000, China

Received date: 2005-11-25

  Revised date: 2005-12-28

  Online published: 2006-04-25

Supported by

National Natural Science Foundation of China, No.40171002; CAS Hundred Talents Program


Land use changes have a great impact on water resources and environment of arid inland regions. In the Heihe river basin, two typical areas were chosen to compare their spatial diversities of land use change and their impacts. Based on three periods of remote sensing data since the 1960s and the quantitative index system, the characteristics of land use pattern changes and land use type changes were compared and analyzed between the two areas, and the impact of land use changes on the stability of oasis system and spatial distribution of water resources in different areas were quantitatively assessed. The results indicate that different land use pattern changes have led to the formation of two different modes in the last 35 years. One is obvious shifting of oasis to headwater and upstream regions; the other is progressive prolongation around downstream old oasis periphery. The former leads to excessive centralized consumption of water resources in the upstream and headwater regions, and rapid decrease of the available water resources in the mid- and down-streams. Within the 35 years, the desertified land at downstream increased by 85.1% and irrigated oases shrank by 25.5%; however, the latter is different. The spatial distribution of water resource utilization centralized in the downstream regions with a small range, and the stability of the whole oasis system was quite high. In view of the relationship between water and land of the whole river basin, reasonable planning of land use mode and land resource distribution in an arid inland river basin is very meaningful to the improvement of the sustainable development of the whole river basin.

Cite this article

WANG Genxu, LIU Jinqi, CHEN Ling . Comparison of Spatial Diversity of Land Use Changes and the Inpacts on Two Typical Areas of Heihe River Basin[J]. Acta Geographica Sinica, 2006 , 61(4) : 339 -348 . DOI: 10.11821/xb200604001


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