【摘要】 根据舟山本岛北部马岙峡道实测水文泥沙资料和沉积物采样分析结果以及对马岙岸段岸滩的现场踏勘结果，分析了马岙峡道的水文泥沙特性及其峡道效应．文章认为，受峡道地形限制，马岙岸段水流呈现显著的往复流特性，潮流流速较强，水体含沙量较低，泥沙淤积较弱，岸滩处于冲淤平衡状态；受峡道内涨落潮流分流和汇流的共同作用，马岙小泥糊礁附近发育水下沙嘴，该沙嘴是以落潮流作用为主形成的浅滩，受涨潮流改造而形成的，并将在涨落潮流作用下逐渐增长，形成连岛沙嘴，使小泥糊礁附近岸线发展成弧形岸线，并达成新的平衡．更多还原

【Abstract】 Based on the hydrographic and sediment data, the characteristics of hydro-sediments and strait channel effects are analyzed. It is suggested that the now shows the obvious characters of an to-and-fro current, the velocity is strong, the sediment concentration is low, the deposition is weak and the shore is on the balance status in the Maao strait channel. Under the joint action of the distributary and conflux of the tidal currents, the under water sprit develops in the little Nihujiao reef. This sprit is modified by the flood current from the under Water shallow which is formed under the ebb current action. This sprit will further develop and form a tambolo, as a result of which the shore forms an arc smooth shoreline and reaches a new balance.更多还原