大连太平湾海区近岸地貌与沉积特征

Geomorphic and sedimentary characteristics of near shore area in Dalian Taiping bay

通过大连太平湾海岸动力地貌调查,分析研究了厂址及周边海岸冲刷、堆积等不同地貌形态特征、岸线冲蚀形态、水下沉积物分布特征。分析结果表明,该区海岸岬角处表现为冲刷,海蚀地貌发育,海蚀柱、海蚀崖与海蚀平台发育较为典型,岬湾处海滩呈微淤状,岸滩宽度较大,沉积物中以粗中砂所占的比例最大,并显示北粗南细的格局。太平湾附近海岸进行了大面积的近岸围海养殖工程,目前仍有岸段养参池石堤向海推进,其规模和占海面积均较大,海岸变化幅度较为显著。

According to dynamic geomorphologic investigation of near shore area in Dalian Taiping bay,geomorphic morphological characteristics such as erosion and accumulation,erosion morphology of seashore,distribution of the sediment on the seabed around the plant site were studied in this paper.The analysis results demonstrate that the erosion in the studied zone is obvious geomorphic features.There are eroded pillars,cliffs and platforms.The bay′s beach is at a tiny silting state and its width is large.In the sediment,the proportion of the coarse medium sand is especially high,and the sediment is coarser in the north and finer in the south in the plane distribution.The sea-closure engineering is being constructed in a large area near Taiping bay,and the stone dike of sea cucumber farming advances towards the sea.Its scale and area are quite large,and seashore is changing in significant range.