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(一) 1.从大些的区域看,三门峡是处于中条山和秦岭间的山间盆地中。在沉积物的性质上看,三门峡地区正好是一个基岩和第四纪沉积物的分界处。由于三门峡以西主要的沉积物是第四纪岩层,三门峡以东则完全是基岩区,所以三门峡以西地区的黄河两岸在地貌上表现出来的持征是由黄土类土形成的级级阶地,河谷较宽,而且有广大的渭河平原,在三门峡以东则大多是高山深溝,河谷狭窄,由黄河所形成的阶地是很少的,因此三门峡被选为根治黄河水害、开发黄河水
(A) 1. From the larger area, Sanmenxia is in the mountain basin between Zhongtiaoshan and Qinling Mountains. In the nature of the sediment, the Sanmenxia area happens to be the boundary between bedrock and Quaternary sediments. Since the main sediment in the west of Sanmenxia is the Quaternary strata and the east of Sanmenxia is the bedrock area completely, the topography of the Yellow River in the area west of Sanmenxia is characterized by the terraces of loess-like soil, Wide, but also the vast Weihe River Plain, in the east of Sanmenxia are mostly deep mountain ditch, the valley is narrow, formed by the Yellow River terrace is very small, so Sanmenxia was elected as the root of the Yellow River water damage, the development of the Yellow River water