论文部分内容阅读
针对黄茅海河口区波流相互作用显著、泥沙运动复杂及空间结构明显等特点,联合第三代海浪模式SWAN,建立了波流共同作用下平面二维动边界潮流泥沙数学模型,模型中考虑了波浪对水流挟沙能力的影响.在分析实测资料、设计水沙系列、验证模型的基础上,实现了对黄茅海水域长期演变的模拟预测.预测结果表明:20a后,黄茅海西滩淤积,滩体向东南方向扩展,大襟岛西北侧-2、-3m等高线外移明显,-5m等高线在大襟岛北端向东扩展约1 400m;拦门沙中央沙体不断淤高,且滩面向南偏东向推移,-5m等高线在中口向南偏东扩展约2 300m;东部浅滩发展趋缓,-3m等高线南端向南淤长,西侧略有蚀退,东侧略有淤长;湾口岛影区域逐渐淤浅,大杧-荷包间-5m等高线向东西两侧明显外移,高栏岛南侧-10m等高线外移约1 200m,变化较为明显.预测成果与资料分析反映的总体趋势基本一致,滩槽发育延伸方向和发育速率与近期实测资料分析的演变规律基本吻合.
Aiming at the obvious wave-current interaction in the estuary area of Huang Mao-hai, the complicated movement of sediment and the obvious spatial structure, combined with the third-generation wave model SWAN, a mathematical model of tidal current sediment under two- The influence of wave on sediment carrying capacity is considered.On the basis of analyzing the measured data, designing water and sediment series and verifying the model, the simulation prediction of the long-term evolution of the Huang Maohai waters is realized.The results show that after 20 years, The estuarine and alluvial beaches extend eastward and southeastwards. The -2 and -3m contour lines on the northwest side of the north margin of the Dajin Island are significantly shifted outwards. The -5m contour line extends eastwards at the northern end of the Dajin Island by about 1,400 meters. And the beach surface is shifting southwards and eastward. The -5m contour line extends eastwards to the south by about 2 300 m in the middle mouth. The development of the east shoal slows down. The southern end of the -3 m contour line is silhouetted southward while the west side is slightly There is eroded back, the east slightly silt long; bayou shadow area gradually silt, big 杧 - pouch -5m contour line to the east and west sides of the obvious shift, south of Gaolan -10m contour line about 1 200m, the change is more obvious.The forecast results and data analysis reflect the general trend of the same, the trough development delay The direction and rate of development and the recent evolution of the observed data analysis basically.