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黄河口存在一个成型堆积体，称拦门沙。多次实测结果，其长度约3～7km，宽度与河宽相同，横亘于黄河尾间与海水相连接处。随着河口延伸，拦门沙也向海推移，淤积最多的部位是前缘急坡区。在拦门沙以上河段，由径流挟带的泥沙和涨潮流引起的悬移泥沙，形成一高含沙区，此高含沙区在洪水时向下移动，在枯水时向上移动，泥沙在这3～7km范围内大量落淤。由于拦门沙的阻拦，水流在拦门沙处受阻而在其上游不断出汉。黄河口的盐水楔在径流较大时，属缓混合型；枯水季节是强混合型。盐水楔上下游运动的范围与拦门沙的长度基本上吻合。
The Yellow River estuary there is a forming pile body, said bar door sand. Repeatedly measured results, the length of about 3 ~ 7km, width and width of the river, lying in the Yellow River tail and sea water at the junction. With the extension of the estuary, the barrage of sandstorms has also shifted to the sea. The most silted sediment area is the frontal scarp area. In the barges above the sand, suspended sediment caused by sediment and rising tide brought by runoff forms a highly sandy area that moves downward during the flood and upward during the dry season , Silt in a large number of 3 ~ 7km off the silt. Due to the barricade blocking the sand, the water flow in the barricade blocked at its upstream continue to Han. The saltwater wedge of the Yellow River estuary is a gentle mixing type when the runoff is large; the dry season is a strong mixing type. The range of upstream and downstream movement of salt wedge basically coincides with the length of barricade sand bar.