Abstract
The spatio-temporal texture characteristics are key parameters for understanding the dynamics of the sedimentary environment. This study was conducted to determine the sediment characteristics in swash zone of Lhoong Beach, Aceh Besar Regency. The analysis emphasizes the seasonal variation of sediment mean grain size (MGS) based on vertical stratification. Sediment samples were taken during November 2018, January 2019 and March 2019, from 3 stations. Samples from station 3 had the coarsest grain characteristics, where the highest MGS value at station 3 was recorded in the mid-layer (5-10 cm) in November. The grain size was found to vary with changing seasons and the depth of the sediment layer. Based on depth stratification, the highest standard deviation was obtained by the mid-layer (5-10 cm); while by period, the highest standard deviation of the MGS value was generated during November.
Highlights
Coastal areas are one of the most dynamic areas on the earth's surface [1]
Seasons play a major role in controlling energy in the aquatic environment [13], [14], where in coastal areas seasonal changes result in variations in the strength and intensity of waves on the coast [15]
The mean grain size (MGS) value was processed arithmetically based on the layer and sample collection period
Summary
Coastal areas are one of the most dynamic areas on the earth's surface [1]. The interaction between land and sea will form a unique morphology in each coastal area [2]– [6]. Seasons play a major role in controlling energy in the aquatic environment [13], [14], where in coastal areas seasonal changes result in variations in the strength and intensity of waves on the coast [15]. It can be further explained that seasonal variations can affect the grain size of sediment through waves on the coast [16]. Complex coastal processes operating in the past and in the present have left their traces in sediments [21], [22] In this regard, coastal sedimentology plays an important role in documenting the depositional history of an aquatic environment [14], [23], [24].
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