Spatial distribution of grain size and depositional process in tidal area along Waikelo Beach,Sumba |
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| Authors: | Septriono Hari Nugroho Purna Sulastya Putra |
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| Institution: | 1. Research Centre for Deep Sea, Indonesian Institute of Sciences (LIPI), Ambon, Indonesia;2. Research Centre for Geotechnology, Indonesian Institute of Sciences (LIPI), Bandung, Indonesia |
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| Abstract: | A study of characteristics and distribution of sediment along Waikelo Beach, Sumba, Nusa Tenggara Timur (NTT), Indonesia has been conducted using grain size train analysis. Grain size train analysis aims to determine physical properties and textural parameters such as mean, sorting, skewness, and kurtosis. Samples were taken from several locations on the beach that represent high-tide, transition, and low-tide areas. The observation of two physical characteristics has concluded two points: (1) changing in textural pattern that shows physical differences of sediments is a result of interaction between deposition process and marine activities; (2) the abundance of coarse to medium sand demonstrates general process of sediment deposition along Waikelo Beach deposited at moderate to low energy. Linear discriminate function indicates aeolian, shallow marine, and fluvial environments. CM diagram (C?=?one percentile in micron, M?=?median in micron) describes the mechanism of sediment deposition on the beach in rolling and ground suspension. These all conditions are supported by the plotting results in the Stewart diagram that shows the influence of current either from waves or from river. |
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| Keywords: | Beach grain size sediment Sumba Waikelo Beach |
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