根据实际观测和勘测资料,介绍和总结了白沙滩沙坝、泻湖、潮流通道和外潮流三角洲等地貌单元的沉积特征和演化机理,分析了它们之间的依存演化关系。白沙滩沙坝是由全新世不同时期3条沙嘴拼贴而成的,沙坝发育导致泻湖出现。当沙坝扩展时泻湖水面缩小,当泻湖扩展时沙坝变窄,在沙坝泻湖交接地带二者呈犬牙交错关系。潮流通道增强直接影响潮流三角洲扩展发育。 According to the actual observation and survey data, the sedimentary characteristics and evolution mechanism of the geomorphic units such as the Baisha beach barrage, the lagoon, the tidal current channel and the outward tidal current delta are introduced and analyzed, and their dependence evolution relations are analyzed. White sand bar dam is made of 3 spittoons collage made at different times during the Holocene, sand bar development led to the emergence of the lagoon. As the sand dam expanded, the water surface of the lagoon narrowed down, the sand bar became narrower when the lagoon extended, and the interlaced teeth interlaced in the sand bar lagoon. Tidal channel enhancements directly affect the trend of delta expansion.