中文摘要：

在与它的控制因素的关系的沉积环境的理解在沿海的地形学，生态学，旅游和水产业研究是很重要的。我们试图处理这个问题，用从 Xincun 泻湖的案例研究，在南部的中国的海南岛。为学习，地表的沉积样品是镇定的，和水动力学和深测术的调查，在 2013 年 8 月期间。数字模拟被执行获得高度空间的分辨率潮汐的当前的数据。沉积样品被分析导出吝啬的谷物尺寸，排序系数，偏斜度和峭度，和沙，淤泥和泥土内容。现代沉积环境用系统簇和主要部件分析被分类。谷物尺寸分析表明沉积被极其稍微沙的淤泥的泥(ESSSM ) 和稍微淤泥的沙(SSS ) 描绘，它分别地在中央泻湖和近岸的浅水区域是分布式的。意味着谷物尺寸从 0 ～ 8.0 变化，与 4.6 的一般水准。淤泥内容最高，即， 52% 平均，分别地与沙和泥土的平均内容是 43% 和 5% 。在那里存在在吝啬的尺寸和水深度之间的重要关联，建议地表的沉积与增加水深度变得更好。簇分析揭示二组样品。第一个组被超过 5.5 的吝啬的谷物尺寸描绘，虽然第二个组有吝啬的谷物尺寸低于 3.5。进一步，这些组也有在吝啬的谷物尺寸和另外的谷物尺寸参数之间的不同关联。以潮汐的水流，根平均数平方速度(RMSV ) 的平均价值分别地在弹簧和小潮是 7.5 cm/s 和 6.9 cm/s。为比 4 cm/s 高的 RMSV，重要积极关联在 63-125 m 部分和 RMSV 的内容之间被发现，建议 RMSV 决定好沙部分的可变性。基于系统簇和主要部件分析(PCA ) ，现代沉积环境根据谷物尺寸参数， RMSV 和水被分类进三种类型深度数据。结果在区分沿海的沉积环境建议谷物尺寸参数和高度空间的分辨率水动力学数据的重要性。

英文摘要：

An understanding of the sedimentary environment in relation to its controlling factors is of great importance in coastal geomorphology,ecology,tourism and aquaculture studies.We attempt to deal with this issue,using a case study from the Xincun Lagoon,Hainan Island in southern China.For the study,surficial sediment samples were collected,together with hydrodynamic and bathymetric surveys,during August 2013.Numerical simulation was carried out to obtain high-spatial resolution tidal current data.The sediment samples were analyzed to derive mean grain size,sorting coefficient,skewness and kurtosis,together with the sand,silt and clay contents.The modern sedimentary environments were classified using system cluster and principal component analyses.Grain size analysis reveals that the sediments are characterized by extremely slightly sandy silty mud（ESSSM） and slightly silty sand（SSS）,which are distributed in the central lagoon and near-shore shallow water areas,respectively.Mean grain size varies from 0 to 8.0Ф,with an average of 4.6Ф.The silt content is the highest,i.e.,52% on average,with the average contents of sand and clay being 43% and 5%,respectively.There exists a significant correlation between mean size and water depth,suggesting that the surficial sediments become finer with increasing water depth.Cluster analyses reveals two groups of samples.The first group is characterized by mean grain size of more than 5.5Ф,whilst the second group has mean grain size of below 3.5Ф.Further,these groups also have different correlations between mean grain size and the other grain size parameters.In terms of the tidal current,the average values of the root mean square velocity（RMSV） are 7.5 cm/s and 6.9 cm/s on springs and neaps,respectively.For the RMSVs that are higher than 4 cm/s,a significant positive correlation is found between the content of the 63–125 μm fraction and the RMSV,suggesting that the RMSV determines the variability of the very fine sand fraction.Based on system cluster and principal