CD Skripsi
Analisis Perubahan Abrasi Dan Akresi Serta Karateristik Sedimen Dipantaiaparpariaman
This research was conducted in January 2024 at Apar Beach, Pariaman. The aim of this study was to examine the changes in abrasion and accretion that have occurred and to understand the sedimentcharacteristicsin support of future management of Apar Beach. The method used in this research was a survey method, involving direct observation (in situ) to collect data on current velocity, waves, and sediment. The research location was divided into three stations, each approximately 200 meters apart. The results of the study showed that over a 20-year period (2004-2024), Apar Beach experienced changes in the shoreline, predominantly accretion. The average rate of accretion during this period was 0.737 m/year. The most significant accretion occurred during the 2004-2014 period, with the highest accretion rate being 5.07 m/year and the lowest at 2.99 m/year, resulting in an average accretion rate of 4.51 m/year. This period was characterized by current velocities capable of transporting sediment but low enough to allow deposition. The sediment at Apar Beach was predominantly coarse to medium sand, with grain sizes ranging from 0.23 to 0.9Φ. The poor to moderate sorting (poorly sorted to moderately sorted) indicates low uniformity in sediment grain size at Apar Beach. Meanwhile, the skewness values at Apar Beach tended to lean towards finer particles (fine skewed), near symmetrical, and very fine skewed. The currents at Apar Beach were categorized as moderate to fast, with velocities ranging from 0.26 to 0.9 m/s. Additionally, wave heights were categorized as very low to low, ranging from 0.25 to 0.51 meters.
Keywords : Accretion, Apar Beach, Currents, Sediment Particles, Waves
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