摘要
对开敞的灌河口外海域,应用三面开边界模型布置,采用边界流量控制技术,成功地复演了复杂的海域旋转潮流,并对拦门沙治理进行了多方案试验。成果表明,开发灌河口外深水航槽,宜采用整治与疏浚相结合的原则;在没有治导工程的开敞水域,挖槽开挖深度愈大、轴线与潮流交角愈大,则流速衰减愈大;在开敞水域选择航槽轴线,要顺应涨落潮流主轴方向,并尽量与外海等深线相垂直;双导堤平面布置不宜呈突然扩大或收缩状,堤顶高程宜与中潮位一致。该成果可供设计部门参考。
The physical model is constructed with three open boundaries to simulate the natural condi- tions in Guanhe Estuary.Applying the water discharge control technology to three open boundaries, the authors have succeeded in reproducing the complicated rotating tidal current in the model of Guan- he Esturay,and in making many experinents on the regulatory works of bar shoal.The results indicate that to develop the deep channel in the Guanhe Estrauy,the principle of combining dredging with reg- ulating should be taken. In open areas without regulating engineering projects,the larger the dredged depth of the channel,the larger the angle between the tidal current and the axial line,and the more the current velocity attenuation.In the selection of the channel axis in the open area,the axis should follow the main direction of the tidal current,and be perpendicular to the isobath of the outer sea.In the plane layout of double dikes,the sudden expansion or contraction should be avoided.The elevation of the top of the dike should be identical with middle tide level.These experimental results can be used by designing departments for reference.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1992年第4期15-22,共8页
Journal of Hohai University(Natural Sciences)
关键词
拦门沙
物理模型
边界流量控制
bar shoal
physical model
boundary discharge control
jetty
