海南昌化江入海口底表沉积物粒度特征及输运趋势

对海南岛昌化江入海口110个底表沉积物样品进行了粒度分析,并利用二维沉积物粒径趋势分析模型对沉积物粒度参数开展趋势分析.研究结果表明,按照Folk沉积物分类三角图解法,昌化江入海口外底表沉积物可划分为含砾砂、砂、砾质泥质砂、砂质砾、粉砂、泥、砂质泥、砾质砂、砂质粉砂和粉砂质砂共10种沉积物类型,其中砂和砾组分的分布范围...

Grain Size Characteristics and Its Response to Sediment Transport Trend in Changhua River Estuary,Hainan Island

Grain size analysis and parameter calculations have been carried out for 110 surface sediment samples from the Changhua River Estuary, Hainan Island. Based on the Folk sediment classification ternary plot, the surface sediment samples can be divided into 10 sediment types: gravelly sand, sand, gravelly argillaceous sand, sandy gravel, silt-sand, mud, sandy mud, gravelly sand, sandy silt, and silty sand. Distribution range of sediment sand and gravel components is similar, and the particle size composition comprises mainly sand, silt-sand, and mud. Factor and cluster analysis of grain size parameters is used to discriminate different depositional environments. The study area can be further divided into the southern nearshore and northern offshore subareas. Grain size trend analysis suggests that the sediment transport pattern is consistent with the local hydrodynamic conditions. There are two aggregate sedimentation centers in the southern and northern parts of the study area. The material source of the banded sediments at Sigengsha Cape has also been identified.