Characteristic of Sediment at Lekok Coastal Waters, Pasuruan Regency, East Java

Abstract

Sedimentation is one of the dynamics that occur in coastal areas to determine the condition of the coast. Lekok coastal water is one of the open water areas that have very fluctuating dynamics in coastal changes. The structural study of sediment distribution conducted in this location is used to provide information about the process of transportation and sedimentation based on the distribution of sediment grain size. This study aims to determine the horizontal grain sediment size in the Lekok coastal waters. This research was conducted at nine sampling points by sampling in the form of primary sediments randomly using the grab sampler method. Furthermore, further analysis is done by the gravimetric method. Based on the results of the study note that sediments characteristic in Lekok coastal water are generally dominated by three types of sediments, namely: sandy loam, loam, and silt loam. Sorting values ​​are in a well-sorted to the moderately well-sorted condition where the sediment conditions are well sorted. The skewness value is skewed positively, where the value indicates a positive skewed sedimentary condition. The value of kurtosis is in the leptokurtic condition where the sediment from station 1 to station 9 is homogeneous.

Spatio-temporal of heavy metal Pb (Lead) in seawater, sediment, and different organs of Cymodocea rotundata in Doreri Gulf, Manokwari, West Papua, Indonesia

“…This is because both locations are slightly far from the high activity of the city of Manokwari with carbonate. Additionally, it is coarser than silt and contains more than 50% carbonate material; hence, sediments' adsorption of heavy metals is lower (Anggraini et al 2020).…”

“…Seagrass beds also affect the ability of incoming waves and currents to transport particles. These conditions modify the oceanographic environment by (i) attenuating currents and wave energy losses, (ii) changing the velocity profile near the bottom to prevent affecting the thicker boundary layer, and (iii) increasing or decreasing turbulence and promoting material transport (Potouroglou et al 2017;Lanuru et al 2018;Anggraini, Yanuhar and Risjani 2020). Additionally, the ability to inhibit sediment movement has been reported (Roem et al 2021a).…”

Diversity, Abundance, and Distribution of Macroalgae in Coastal Ecotourism Areas — A Case Study at Baluran National Park, Situbondo, Indonesia

“…The nutrient analysis was conducted by spectrophotometer (Model AMV01 AMTAST, USA), as described in a previous study (Emilia, 2019). Soil and sediment samples from the two sampling stations were analyzed using the gravimetric triangle method to determine the criteria, the percentage of sediment composition, and the type of constituent textures (Anggraini et al, 2020).…”

Bioaccumulation and Ecological Risk Assessment of Heavy Metal Contamination (Lead and Copper) Build Up in the Roots of <i>Avicennia alba</i> and <i>Excoecaria agallocha</i>

“…Sediment grain size analysis has been conducted using sieving and pipetting methods (Romano et al, 2017). Then, to determine the type of sediment substrate (gravel, sand, mud, and clay) using Shepard's triangle analysis with Microsoft Excel V.2021 (Poppe and Eliason, 2008;Anggraini et al, 2020). The determination of sediment fraction type was based on the most significant composition value from the data.…”