Lintasan sampah mikro plastik di kawasan konservasi perairan Nasional Laut Sawu, Nusa Tenggara Timur
Abstract
Abstract. At present, marine debris is an important issue in Indonesia. Due to the complex pattern of ocean currents, research on the distribution of marine waste in Indonesia is still very lacking. This study aims to determine the movement of microplastic particles at the Savu Sea National Marine Park. The method used was to simulate the hydrodynamic model and particle trajectory. Data used were wind, tides, bathymetry, coastline, weight of garbage, and garbage fluxes. Analysis was carried out on physical data visualization, hydrodynamic models, and particle trajectory models. The hydrodynamic model simulation shows if the average current velocity ranges from 0,0002 m/s to 0.35 m/s. The particle trajectory showed that microplastic particle movements tend to move to the south, where some of them move west and east of the Savu Sea. Besides being affected by tides, microplastic particle movements in the Savu Sea National Marine Park are also influenced by various currents that pass through the Savu Sea waters, especially by Indonesia Troughflow.
Keywords: ocean model, particle pathways, microdebris, Savu Seas, Indonesia Troughflow
Abstrak. Saat ini, sampah laut merupakan salah satu isu kemaritiman di Indonesia. Karena pola pergerakan arus yang kompleks, penelitian mengenai distribusi sampah laut di Indonesia masih sangat kurang. Taman Laut Nasional Laut Sawu sebagai wilayah yang dilalui Arlindo juga memiliki karakteristik oseanografi yang kompleks. Penelitian ini bertujuan untuk mengetahui hasil simulasi pergerakan partikel sampah di Taman Nasional Perairan (TNP) Laut Sawu. Metode yang digunakan yaitu simulasi model hidrodinamika dan lintasan partikel. Data yang digunakan yaitu angin, pasang surut, batimetri, garis pantai, berat sampah, dan flux sampah. Analisis dilakukan terhadap visualisasi data fisik, model hidrodinamika, dan model pergerakan partikel. Simulasi model hidrodinamika menunjukkan jika rata-rata kecepatan arus berkisar antara 0,0002 m/s hingga 0,35 m/s. Hasil simulasi menunjukkan jika pergerakan partikel mikroplastik cenderung bergerak ke selatan, dimana sebagian bergerak ke arah barat dan timur Laut Sawu. Selain dipengaruhi pasang surut, pergerakan partikel mikroplastik di Taman Laut Nasional Laut Sawu juga dipengaruhi oleh berbagai arus yang melewati perairan Laut Sawu khususnya Arlindo.
Kata kunci: pemodelan, lintasan partikel, sampah mikro, Laut Sawu, Arlindo.
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PDFDOI: https://doi.org/10.13170/depik.8.2.13423
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Faculty of Marine and Fisheries
Universitas Syiah Kuala
Jalan Meureubo No. 1, Kopelma Darussalam
Banda Aceh, 23111, Indonesia
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