【摘要】 以海滩沉积地貌现场观测资料为基础 ,通过海滩剖面形态组合 ,历史地形资料比较和特征地貌形态变化理论计算分析 ,对汕头南部企望湾弧形砂质海岸切线段的海滩剖面冲淤幅度进行了估算。结果表明 ,该海滩剖面冲淤幅度具有区段变化 ,低潮阶地和槽谷部位约 1 .5～ 2 .0m,滩肩和水下沙坝部位可达 3 .0 m。近 3 0年来 ,海滩剖面总体上趋于微冲刷 ,平均冲刷强度约为 1～ 2 cm/a,可能与近期人工挖砂有关。更多还原

【Abstract】 Analysed by the form character of beach profile,the variable calculation on feature morphology form and comparison between the historical topography data.This paper emphatically discussed the adjustable fluctuation between erosion and deposition on beach profile at the tangent section in sandy arc-shaped shore of the Qiwangwan bay,it usually ranges from 1.5m to 2.0 m on the location of the low tide terrace and longshore trough,and can reach a maximum of 3.0 m on the location of the beach berm and longshore bar.Beach profile trended to the gentle erosion with the average rate of about 1~2cm/a on the whole during the past 30 years,which might likely relate to sand digged by human recently.更多还原