大连长兴岛马家浅滩稳定性分析

通过分析马家浅滩的沉积环境、泥沙来源、水下地形变化及泥沙活动性,探讨了马家浅滩的稳定性.研究结果表明:1)马家浅滩为砂质沉积物厚度超过10m的水下沙脊,浅滩上的沉积物颗粒较粗,分选性也很好.2)多年来马家浅滩的形状和位置没有发生明显变化,马家浅滩水下地形处于稳定状态.3)马家浅滩泥沙大风浪作用下也难以发生全面推移,浅滩泥沙不会被大量掀起而出现大浪淘刷,因此马家浅滩可保持稳定状态.

On stability of Dalian Changxingdao Majia shoal

Based on the analysis of depositional environment,sediment sources,underwater topographic change,and shallow sediment activity,this paper discusses the stability of Majia shoal.The results reveal that:(1)Majia shoal is an underwater sand ridge consisting of coarse sandy deposition of over 10m thick,and the sediment source is limited;(2)Majia shoal has not an obvious change in shape and location during the past many years,and the underwater topography has been keeping stable;(3)The shoal sediment is difficul...