Coastal and nearshore sediment samples of the eastern coastal zone of Bangladesh

This dataset is composed of nearshore and coastal sediment from 42 samples. Samples are collected from three coastal areas in the eastern coastal zone of Bangladesh, which includes the part of the northern Bay of Bengal. 17 samples were collected from the Cox’s Bazar coast, numbered as C1 to C17; 10 samples are from the Teknaf coast, numbered T16 to T25; and 15 samples are from Saint Martin’s Island coast, numbered here as T1 to T15. Samples were retrieved from the seafloor using a Van Veen grab sampler from February 2018 to March 2019. After retrieving the samples, they were transported to the laboratory using geological sample bags. Samples were dried in the open air and taken at approximately 100g for sieving. All the samples fall below the 2 mm size of the sieve. So, six sieve meshes (1mm, 0.5mm, 0.25mm, 0.125mm, 0.063mm, and pan) were used for the determination of grain size. Sediment grain sizes were calculated using Folk and Ward (1957) formulae.本数据集由42份近岸与海岸沉积物样本组成。样本采集自孟加拉国东部沿海带的三个沿海区域，该区域涵盖孟加拉湾北部部分海域。其中17份样本采自科克斯巴扎尔海岸，编号为C1至C17；10份样本采自特克纳夫海岸，编号为T16至T25；另有15份样本采自圣马丁岛海岸，本次研究中将其编号为T1至T15。样本于2018年2月至2019年3月期间，通过Van Veen采泥器（Van Veen grab sampler）从海底采集。样本取回后，采用地质样品袋封装并运送至实验室。随后将样本自然风干，称取约100g进行筛分处理。所有样本的粒径均小于2mm，因此选用6种筛网孔径（1mm、0.5mm、0.25mm、0.125mm、0.063mm及底盘（pan））开展粒度测定。沉积物粒度参数通过Folk与Ward（1957）公式计算得到。