Analisa Laju Sedimentasi Area Reklamasi Di Pantai Melasti, Bali

Pradia, Genta Mochammad Akbar (2023) Analisa Laju Sedimentasi Area Reklamasi Di Pantai Melasti, Bali. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pertengahan tahun 2018 telah dimulai aktivitas pengerukan dan reklamasi yang terjadi di Pantai Melasti, Kabupaten Badung, Provinsi Bali. Aktivitas ini selesai pada pandemi 2021 dengan total area reklamasi 2,6 hektar. Area reklamasi berbentuk menyerupai seawall dengan kolam tambak di tengahnya. Sedimentasi mulai terjadi pada tiap ujung area reklamasi. Penulis akan melakukan studi penelitian untuk mengetahui dampak dari aktivitas pengerukan dan reklamasi ini saat sebelum adanya aktivitas dan sesudah adanya aktivitas. Penelitian ini melakukan pemodelan numerik menggunakan Software Delft3D untuk mengetahui pola laju aliran dan endapan sedimentasi yang terjadi pada area Pantai Melasti. Pola arus yang terjadi pada daerah ini tidak mengalami perubahan, tetapi kecepatan arus yang terjadi setelah reklamasi mengalami pengurangan kecepatan karena adanya hambatan reklamasi. Kecepatan arrus spring tide sebelum reklamasi terjadi dengan kecepatan 0.0314 m/s, sedangkan kecepatan arus spring tide setelah reklamasi sebesar 0.0209 m/s. Begitupun ketika keadaan neap tide, kecepatan arus sebelum reklamasi dapat mencapai 0.0274 m/s, sedangkan untuk kecepatan arus tertinggi saat neap tide ketika reklamasi mencapai 0.0169 m/s. Berdasarkan 8 titik area observasi, laju laju sedimen sebelum reklamasi dapat mencapai 0.0187 m/Bulan, sedangkan ketika adanya reklamasi laju sedimen meningkat sebesar 0.0563 m/Bulan. Peningkatan laju sedimentasi terjadi karena adanya reklamasi yang membuat butiran-butiran sedimen mengendap di area sekitar reklamasi dan melayang ke tiap ujung boundaries pemodelan.
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In mid-2018, dredging and reclamation activities began at Melasti Beach, Badung Regency, Bali Province. These activities were completed during the 2021 pandemic, covering a total reclamation area of 2.6 hectares. The reclaimed area resembles a seawall with a fish pond in the middle. Sedimentation started occurring at both ends of the reclamation area. The author intends to conduct a research study to assess the impact of these dredging and reclamation activities before and after their occurrence. This study will employ numerical modeling using Delft3D software to determine the flow patterns and sediment deposition occurring at Melasti Beach. The current patterns in this area have not undergone any changes, but the current velocities have decreased due to the reclamation barriers. The pre-reclamation spring tide velocity was recorded at 0.0314 m/s, while the post-reclamation velocity decreased to 0.0209 m/s. Similarly, during neap tide conditions, the pre-reclamation current velocity reached 0.0274 m/s, while the highest current velocity during neap tide after reclamation was measured at 0.0169 m/s. Based on observations from eight monitoring points, the sedimentation rate prior to reclamation was 0.0187 m/month, whereas after reclamation, the sedimentation rate increased to 0.0563 m/month. This increase in sedimentation rate is attributed to the reclamation, causing sediment particles to settle in the surrounding area and float towards the boundaries of the model.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Reclamation, Current Pattern, Sedimentation, Delft3D. Reklamasi, Pola Arus, Sedimentasi, Delft3D.
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC175.2 Sediment transport T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC343+ Reclamation of land from the sea T Technology > TC Hydraulic engineering. Ocean engineering > TC801 Reclamation of land T Technology > TD Environmental technology. Sanitary engineering > TD194.6 Environmental impact analysis
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Genta Mochammad Akbar
Date Deposited:	17 Jul 2023 02:03
Last Modified:	17 Jul 2023 02:03
URI:	http://repository.its.ac.id/id/eprint/98473

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