Geochemistry and grain size distribution of surface sediments of a large semi-enclosed lagoon connected to the western Bay of Bengal

Adikaram, Madurya; Pitawala, H.M.T.G.A.; Ishiga, Hiroaki; Jayawardana, D.T.

doi:10.1016/j.ecss.2018.09.002

Cited by 9 publications

(2 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sand and silt content are high in the lagoon entrance area. This is caused by the strong hydrodynamic environment in the lagoon entrance due to the combined action of waves and tides [14,[27][28]. The sediments in the lagoon area are dominated by silt and clay with fine grain size and poor sorting.…”

Section: Distribution Characteristics Of Grain Size Parametersmentioning

confidence: 99%

“…Grain size can effectively determine the transport mode and trend of sediments and reflect the strength of the hydrodynamic environment. Grain size analysis is widely used in the study of sandbarlagoon sedimentary environment [12][13][14][15]. Due to its unique location at the land-ocean transition zone, different parts of the sandbar-lagoon are affected by different sedimentary environment, and therefore exhibit different evolutionary patterns [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sediment characteristics and sedimentary environment analysis of a sandbar-lagoon system developed at the estuary of Fudu River, China

Zhang

Yan

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Developed at the estuary of Fudu River, the sandbar-lagoon system there occupies the longest sandy coastline of east coast of Liaodong Bay, China. Over the past several decades, substantial changes are believed to have occurred over the system regarding its sedimentary characteristics and dynamic environment, partly due to the anthropogenic influences. However, few studies have been reported to investigate such evolution. To fill this gap, grain size analysis was conducted with 52 sediment samples to reveal the sediment distribution patterns. In addition, the sedimentary environment and sediment transport trend were studied using the Pejrup M triangular diagram and Gao-Collins grain size trend analysis method. Our results show that the surface sediments are mainly sandy with coarser sediment found over the northern part of the sandbar whereas fine-grained sediments are mainly in the lagoon area. The sedimentary dynamics environment can be divided into the northern area of sandbar and the lagoon area. The relatively larger grain size, low sorting coefficient and positive skewness in the northern part of sandbar indicates a strong and stable hydrodynamic environment dominated by waves and currents. Meanwhile, the small mean size, high sorting coefficient and negative skewness in the lagoon area implies a weak hydrodynamic environment due to significant reduction of hydrodynamic strength. In the lagoon area, the sediments are transported mainly from coastal ocean to the interior of lagoon in suspension. Our study provide basin understanding of the controlling dynamics on sandbar evolution, and can provide guidelines for the preservation of the sandbar-lagoon system.

show abstract

Section: Distribution Characteristics Of Grain Size Parametersmentioning

confidence: 99%