人工岛建设对海口湾沉积特征与泥沙运移的影响

近年来,人工岛被广泛应用于沿海地区的填海造陆工程以快速获得优质土地,但大面积的人工岛建设会对近岸海底沉积物的分布模式及输运过程产生重要影响.为认识人工岛建设后沉积物变化与运移特征,本文以南海明珠人工岛对海口湾的影响为例,根据人工岛建设前后分别在海口湾近岸采集的底质表层沉积物分析了沉积物特征变化,结合沉积动力分析及粒径趋...

The impact of artificial island construction on sedimentary characteristics and sediment transport in the Haikou Bay

In recent years, artificial islands have been widely constructed in coastal areas to quickly obtain high-quality land resources. However, the construction of artificial islands may exert substantial effects on the distribution patterns and transport processes of offshore seabed sediments. To understand the changes and transport characteristics of sediments after the construction of artificial islands, this article focuses on the impact of Nanhaimingzhu (NHMZ) artificial island on the properties and distribution of offshore seabed sediments in the Haikou Bay. With surface sediments sampled respectively in the offshore of the Haikou Bay before and after the construction of NHMZ artificial island, the changes in sediment characteristics were analyzed. The impact of NHMZ artificial island on the surface sediments properties and transport trend in the Haikou Bay was discussed with sedimentary dynamic and grain size trends analysis. The results showed that the surface sediment properties changed significantly after the construction of NHMZ artificial island, with the fine-grained sediment composition increased, grain size decreased and the sorting worsen. It was found that the weakening of sedimentary dynamic conditions in the Haikou Bay caused by NHMZ artificial island was an important factor for the changes in seabed surface sediments grain size and the trend of sediment transport.