黄河水下三角洲沉积物输运及海底冲淤研究  

Study on Sediment Transport and Seabed Scour and Depositionin the Yellow River Subaqueous Delta Area

作　　者：张士华[1] 邓声贵[2] 

机构地区：[1]胜利石油管理局钻井工艺研究院,山东东营257017 [2]中国海洋大学海洋地球科学学院,山东青岛266003

出　　处：《海洋科学进展》2004年第2期184-192,共9页Advances in Marine Science

基　　金：国家高新技术研究发展规划项目--滩海油田黄河口侵蚀演变数值模拟技术(2001AA616160);国家重点基础研究发展规划项目--三角洲海岸侵蚀与岸坡失稳灾害的防护决策(2002CB412408)

摘　　要：根据黄河水下三角洲的特点,建立了一个垂直平均二维沉积物输运数学模型,结合潮流和沉积物资料,模拟研究了沉积物输运机制和海底冲淤演变过程。模拟结果表明,垂直河口射流的潮流决定了本区沉积物净输运的总体格局,风应力对悬浮泥沙和推移质泥沙运动也起到重要作用。潮流底应力和活动层厚度分布表明,黄河口门和埕岛油田附近海域是潮流底应力和活动层厚度高值区,为沉积物活跃区,海底稳定性弱,易于侵蚀再搬运。冲淤计算表明,埕岛油田附近海域为冲刷中心区;现在河口水下三角洲在断流时为冲刷区,正常行河时则转为淤积区。Based on the characteristics of the Yellow River subaqueous delta, a two-dimensional mathematical model for vertically averged sediment transport was formulated, and the sediment transport mechanism and the sedbed scour and deposition evolution process were simulated and analyzed in combination with the tidal current and sediment data. It is shown from the simulation results that the general pattern of net sediment transport in the area is dependent on the tidal current traverse to the estuarine jet, and the wind stress also has an important effect on the movement of suspended and bedload sediments. It is shown from the distributions of bed stress of tidal carrent and active layer thicknes that the Yellow River mouth area and the Chengdao oil field sea area are high value area of bed stress of tidal current and active layer thickness and also active sediment area with weak seabed stability and sediments being easy to be eroded and retransported. It is shown from the scour and deposition computation results that the Chengdao oil field sea area is the scour center area; and the Yellow River mouth subaqueous delta is scouring area during the zero river discharge period and is depositing area during the normal river discharge period.

关 键 词：黄河三角洲 数值模拟 沉积物输运 海底冲淤 

分 类 号：P737.23[天文地球—海洋地质]