龙门山是青藏高原东缘边界山脉，具有青藏高原地貌、龙门山高山地貌和山前冲积平原三个一级地貌单元。
The large-scale morphology of the eastern margin of the Tibetan plateau can be divided into three zones, the Tibetan Plateau, Longmenshan and Sichuan Basin.
同位素研究表明，包头平原中山前倾斜平原和黄河冲积平原区地下水具有不同的水循环模式。
The isotopic evidence shows that the groundwater in the mountain apron and the Yellow River alluvial plain in Baotou plain has different groundwater circulation models.
评价结果，在塔里木河近现代冲积平原有古河道淡水可以利用，昆仑山山前冲洪积扇普遍赋存可以利用的咸水。
The results show that the freshwater reserved in paleo-riverway on alluvial plain and salt water reserved in alluvium and diluvium on the foot plain of Kunlun Mountains.
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