The Zhanjiang Bay can be regarded as a tidal inlet system of drowned valley lagoon type.
湛江湾是一溺谷—泻湖型的潮汐通道系统，着重讨论了围海造地与该系统的关系，特别指出１９５８年的南三岛的联围，使湛江湾扩大了纳潮面积，完善了潮汐通道系统。
Hainan Island coast has many tidal branch estuaries,mainly grouped under 3 types,namely sand bar lagoon type,estuarine type and drowned valley type.
3溺谷型潮汐汊道主要分布在海南岛北岸、东北岸。