登州浅滩的形成、动态演化及其可恢复性研究
Discussion on the evolution cause and its recovery for the Dengzhou Shoal, China
-
摘要: 登州浅滩是位于渤海海峡南部登州水道西侧海域的长条状水下沙洲,经海底地貌形态对比、沉积物取样及海区动力条件分析,初步推断为全新世以来形成的潮流沉积体的一部分,后经波浪和沿岸流等动力的长期改造逐渐稳定成为边缘坝地貌形态.20世纪80年代中期开始在登州浅滩进行的大规模人工挖沙严重破坏了沙体的动态平衡.利用水库模型估算,浅滩在短期内难以恢复到原来的规模.Abstract: The Deng zhou Shoal shaped in a stripped sub-water sandbar is located in south of the Miaodao Channel. Comparing the charts of 1974 with 1959,there is little change on the shoal with its to pography and water depth.It shows that the shoal had been in a state of dynamical equilibrium.Detailecl analysis on the sub-water geomorphology,sediments composition and environmental conditions,it can be deduced that the Dengzhou Shoal is one part of the ebb-tidal sand ridges formed after the period of Holocene.It is like a submerged barrier preserved the Penglai northeastern coast from wave incursion.But since 1985,some companies have begun to dredge on the shoal and caused the huge sand lost.Till 1990,the resident area surrounded by the-5 misobath line was changed from the original 3.96 km2 to 0.5 km2.Estimated by the reservoir model,the shoal can be recovered but cannot returned to the original scale.
-
Key words:
- Dengzhou Shoal,China /
- cause of formation /
- evolution /
- reservoir model
-
李凡,林美华.辽东湾海底残留地貌和残留沉积[A].海洋科学集刊:第23集[C].北京:科学出版社,1984.5667. 刘振夏,BERNE S.渤海东部全新世潮流沉积体系[J].中国科学(B辑),1994,24(12):1 331-1 338. 夏东兴,刘振夏,王揆洋,等.渤海东部更新世末期以来的沉积环境[J].海洋学报,1995,17(2):86-92. 秦蕴珊,李凡.黄海入海泥沙对渤海和黄海沉积作用的影响[A].海洋科学集刊:第27集[C].北京:科学出版社,1986.124-134. 刘振夏,夏东兴,王揆洋.中国陆架潮流沉积体系和模式[J].海洋与湖沼,1998,29(2):141-147. KEITH R Dyer, DAVID A Huntley. The origin, classification and modeling of sand banks and ridges[J]. Continental Shelf Research, 1999, 19: 1285-1330. 耿秀山.中国东部晚更新世以来的海水进退[J].海洋学报,1981,3(1):114-130. 刘敏厚,吴世迎,王永吉.黄海晚第四纪沉积[M].北京:海洋出版社,1987.386-389. WU Gui-qiu. Discussion on Coastal Erosion near Xizhuang, Penglai, China[J]. China Ocean Engineering, 1994, 8(2):231-236. FITZGERALD D M. Shoreline erosion-depositional processes associated with tidal inlets[A]. AUBREY D G, WEISHAR L. Hydrodynamics and Sediment Dynamics of Tidal Inlets[M]. New York: Springer, 1988. 187-255. VAES G, BERLAMONT J. Emission predictions with a multi-linear reservoir model[J]. Water Sci Tech, 1999, 39(2):9-16. NICHOLAS C K. Reservoir model of ebbtidal shoal evolution and sand bypassing[J]. J of Waterway, Port, Coastal, and Ocean Engineering, 2000, 126(6): 305-313. -
点击查看大图
计量
- 文章访问数: 727
- HTML全文浏览量: 9
- PDF下载量: 1095
- 被引次数: 0
下载:
