潮流三角洲又称潮流沙脊群。多形成于潮沙韵律强的大型水道两端或河口地区。是由2～3节以上的潮流，在沙质海底塑造而成的水下沙脊及脊间沟谷群。沟脊的平面轮廓呈放射状、掌状、鸟爪状等，顶端朝向潮流辐聚或辐散点。
胶州湾属基岩海湾型潮汐通道，湾口内、外发育较为典型的涨、落潮流三角洲，地貌体系较为完整。
The Jiaozhou bay is a tidal inlet of bedrock bay type, the typical flood and ebb tidal deltas are developed inside and outside the bay mouth, and the geomorphologic system in the bay is complete.
由于 水流的非正向入射，潮汐通道地貌 体系不对称，潮流三角洲在湾内东侧发育、在湾外东北侧发育。
The obliquely inflowing current forms an asymmetric geomorphologic system in the tidal inlet, the tidal deltas are more developed on the east side of inner bay and on the northeast side of outer bay.
该体系包括大沽河-洋河潮控三角洲和与狭口海湾密切相关的涨、落潮流三角洲，潮流作用在各三角洲的形成过程中为主要的沉积动力。
The Dagu-Yanghe tidal delta, a facies system, is formed on the west side of Jiaozhou bay, where the river mouth bar and interdistributory bay are the major sub-facies.
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