强潮河口拦门沙航道回淤及治理措施  

Back silting and regulation of waterway with sand bar in strong tidal estuary

作　　者：陆永军[1] 李浩麟[1] 王红川[1] 左利钦[1] 

机构地区：[1]南京水利科学研究院水工水力学研究所,江苏南京210029

出　　处：《水利学报》2005年第12期1450-1456,共7页Journal of Hydraulic Engineering

基　　金：国家重点基础研究发展计划资助(2003CB415206);国家自然科学基金资助项目(50379027)

摘　　要：针对瓯江口边界地形复杂、岛屿众多、口门以上河段存在高含沙量浑浊带以及底沙级配分布宽的特点,分析了强潮河口拦门沙演变规律及成因,应用波浪与潮流共同作用下的二维泥沙数学模型,研究拦门沙航道开挖后的回淤及治理措施。数学模型中引进前期含沙量的概念,得到了潮流挟沙能力公式,给出了波浪作用下浮泥引起航槽回淤的模拟方法。在瓯江口潮流与含沙量验证基础上,进行了拦门沙航槽开挖后悬沙、底沙与浮泥引起航槽回淤的验证计算,计算的淤积厚度及沿航线分布趋势与实测值比较接近。在此基础上,研究了瓯江口拦门沙航道治理原则、措施及工程对水动力泥沙环境的影响。The cause of sand bar formation and its evolution A 2-D mathematical model for sediment transport under the in river mouth of Oujiang River are studied. co-action of wave and tidal flow is applied to calculate the probable back silting of the sand bar after excavation and the best regulati investigated. In the model, the concept of antecedent sediment concentration method for is verified regulatio simulating the back silting under the by the prototype observation data. neasures and the impact on sediment is introduced and the validity of the method action of wave is established. The On this basis the principles of waterway regulation, environment are further studied.

关 键 词：强潮河口 拦门沙 航道治理 波浪 潮流 数学模型 悬沙 浮泥 航槽回淤 

分 类 号：U617.5[交通运输工程—船舶及航道工程]