Dynamic tendency of arid oasis under the influence of water resources decreaseA case study of Ejina oasis in Heihe River Basin

Abstract

Abstract: The runoff changes of arid inland river seriously influenced on the formations and changes of oasis in the lower reach. By the oasis patches dynamic modeling, the vegetation water interrelated analysis, and the estimation of water demand by the ecological system, the dynamic tendency of the Ejina oasis in the lower reach of Heihe River Basin under difference water resources allocating were studied. The results showed that the lowest water demanded for preserving the present oasis area was about 5.7×10⁸m³ based on rational usage of the water resources. Considering the water demand of people and livestock, and the water lose in the water transport process, the incoming runoff through the Langxinshan section should be about 6.0×10⁸m³ to preserve the present oasis area before 2015. To regain the oasis area to the level at the primary of 1980s, the demand incoming runoff should be about 8.9×10⁸m³, and the runoff through the Zhengyixia section should be 10.9×10⁸～13.1×10⁸m³.

Key words: Arid area, Oasis, Surface runoff, Dynamic change, Analysis

CLC Number:

Q146

WANG Genxu, CHENG Guodong, SHEN Yongping. Dynamic tendency of arid oasis under the influence of water resources decreaseA case study of Ejina oasis in Heihe River Basin[J]. Chinese Journal of Applied Ecology, 2002, (5): 564-568.

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