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- Title
大型工程综合影响下徐圩海域近岸海床 演变特征分析.
- Authors
赵志伟; 朱鹰; 袁文昊; 刘红; 马兴华
- Abstract
With the completions of large-scale construction projects such as Qitai embankment, Xuwei embankment and Guanhekou guide dike, the seabed evolution in the Lianyungang-Xuwei sea area has changed from natural evolution to the evolution under engineering conditions. In particular, the stability of the Guanhekou sand spit is very important to the Xuwei Channel. Based on the analysis of terrain comparison and tidal mathematical model by topographic data from the sea area of Lianyungang to Xuwei, the seabed evolution analysis in Xuwei sea area under the comprehensive influence of large-scale engineering was carried out. The results show that since the construction of large-scale engineering, the terrain of the sea area near the engineering has been significantly adjusted. The seabed near shallow beach at the constructions has silted up and the area of 2 m-shoal continues expanding to the open sea, and the seabed at the outer edge and head of the embankment and guide dike was scouring. Especially during the period from 2013 to 2018, the amplitude of terrain erosion and sedimentation reached its maximum. After 2018, the seabed in the engineering sea area is still in the process of adjustment, but the amplitude of terrain erosion and sedimentation and the change rate of isobath have slowed down. The outward rate of sedimentation in Guanhekou sand spit has increased compared with the natural evolution period, but since 2018, the frequency of large waves near the sand spit has been low, and the sand spit has remained stable overall. The results provide important reference and inspiration for the evaluation of large-scale coastal engineering in the surrounding sea areas.
- Subjects
SAND waves; COASTAL engineering; OCEAN bottom; CONSTRUCTION projects; EMBANKMENTS
- Publication
China Harbour Engineering, 2024, Vol 44, Issue 8, p9
- ISSN
2095-7874
- Publication type
Article
- DOI
10.7640/zggwjs202408002