崖州湾进港航道回淤特征及机制分析  

Analysis on characteristics and mechanism of back-siltation in approach channel in Yazhou Bay

作　　者：童朝锋[1] 田家庆 孟艳秋[1] TONG Chao-feng;TIAN Jia-qing;MENG Yan-qiu(College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing,Jiangsu 210098,China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《中国港湾建设》2022年第11期1-6,共6页China Harbour Engineering

基　　金：国家自然科学基金联合基金(重点支持)项目(U2040203)。

摘　　要：基于崖州湾南山港进港航道2013—2020年地形数据,研究分析开挖航道回淤特征。回淤分析结果显示崖州湾进港航道年淤积强度为0.24~0.59m/a,航道年淤积强度与开挖水深具有良好的正相关性,槽内回淤泥沙以砂和粉砂为主。应用航槽回淤强度公式计算分析常浪和大风天槽内泥沙回淤占比,结果显示进港航道航槽回淤集中在大风天。根据泥沙粒度参数采用Gao-Collins粒径趋势分析法分析崖州湾水域床沙输运趋势,总体呈现与波浪方向相近的离岸—向岸横向输运,波浪是航槽区域床沙输运的控制动力。Based on the topographic data of the approach channel in Nanshan Port,Yazhou Bay,from 2013 to 2020,thecharacteristics of back-siltation in the excavated channel are studied and analyzed.The results show that the annual siltationintensity is 0.24~0.59 m/a in the channel.The annual siltation intensity of the channel is proportional to the cutting depth andthe back-siltation sediment in the channel is mainly sand and silt.The proportion of back-siltation sediment in normal daysand windy days is determined by using formulas for siltation intensity in approach channel,and the result shows that the backsiltation in the approach channel is concentrated in windy days.According to the parameters of sediment particle size,the GaoCollins grain size trend analysis method is also used to analyze the bed material transportation trend in the Yazhou Bay,and itgenerally shows an offshore-onshore transverse trend,which is close to the direction of the waves.Wave is the controllingdynamics of the bed material transportation in the navigation area.

关 键 词：崖州湾 航槽回淤 淤积强度 床沙输运趋势 

分 类 号：U612[交通运输工程—船舶及航道工程]