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ARID TREND AND ECO-ENVIRONMENTAL EFFECT OF WATER-SALT IMBALANCE IN NORTHWEST CHINA

Xu Hengli Zhou Aiguo Xiao Guoqiang Zhi Bingfa Ye Hanchun (Faculty of Engineering, China University of Geosciences, Wuhan430074, China)$$$$  
In terms of the arid trend in the Northwest China, this paper deals with the system dynamic pattern of water transfer and salt accumulation in this closed inland basin and elucidates the basic cause for the corresponding imbalance between the supergene salt accumulation and water salt. In this context, the paper reveals the internal relations between the water salt distribution and the soil eco adaptability , presents the effect of the variation in the rhythm of water cycle on the spatial temporal distribution of the soil eco indices, and advances the great importance of the Great West Development by establishing the survival domains of various species and the soil eco indices in the Northwest China. In addition, this paper discusses the construction of the reservoir project and the selection of the irrigation techniques in this inland basin.
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