Impact prediction on oasis of Geermu River with expanding the exploitation of water source

The water source of Geermu which was in inland arid region was imbalance. With the gradual enlargement of the scale of Geermu water source mining, regional underground water level was decreased, and the overflow downstream was reduce, leading to vegetation degradation of oasis. Geermu River’s alluvial and flood fan hydrogeologic conditions were analyzed in this article. Visual Modflow was used to build a model on groundwater, aiming at impact prediction on oasis band downstream with decreasing of regional underground water level after the expansion of the gradual enlargement of the scale of Qingxia water source upstream in decades. The results showed that the oasis species were not affected by expanding mining, and the distribution of sedge would extend while soil salt content was suitable in wet season. The above results were standstill in normal water period and contrary in dry season.

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