OPTIMALISASI RASIO CELAH CURTAIN-WALL PILE BREAKWATER UNTUK PENINGKATAN KESELAMATAN OPERASIONAL PELABUHAN

Subekti Subekti; Hamdan Akbar Notonegoro; Bambang Soegijono

doi:10.32500/jebe.v8i1.11084

Authors

Subekti Subekti Universitas Sultan Ageng Tirtayasa
Hamdan Akbar Notonegoro Universitas Sultan Ageng Tirtayasa https://orcid.org/0000-0002-8162-5488
Bambang Soegijono Institut Sains dan Teknologi Nasional

DOI:

https://doi.org/10.32500/jebe.v8i1.11084

Keywords:

Pemecah gelombang Curtain-wall, koefisien transmisi gelombang, selamatan logistik maritim, hidrodinamika, rasio celah terhadap kedalaman

Abstract

Pelabuhan penghubung antar pulau merupakan tulang punggung logistik nasional, namun energi gelombang ekstrem mengancam stabilitas tambatan dan efisiensi bongkar muat kargo. Penelitian ini bertujuan untuk mengevaluasi kinerja hidrodinamika Curtain-Wall Pile Breakwater (CPB) dalam meredam energi gelombang. Metodologi dilakukan melalui pengujian model fisik pada saluran gelombang (wave flume) berdimensi 15 x 0,3 x 0,45 m menggunakan alat ukur gelombang (wave probe). Variabel independen yang diuji adalah rasio celah terhadap kedalaman (a/d) dengan variasi lebar celah 5 cm, 10 cm, dan 15 cm untuk mengukur respons koefisien transmisi (K_t) dan refleksi (K_r) terhadap tinggi gelombang datang (H_i). Hasil penelitian menunjukkan bahwa koefisien transmisi (K_t) meningkat secara non-linear seiring dengan pelebaran celah bawah. Pada rasio celah terkecil (a/d ≈ 0,1), CPB mampu meredam gelombang secara signifikan dengan nilai K_t mencapai 0,20, yang memenuhi ambang batas "kolam tenang" (H_t < 0,3 m) untuk operasional bongkar-muat logistik pelabuhan. Sebaliknya, celah yang lebih lebar (a/d > 0,3) menghasilkan K_t > 0,6 yang berisiko memicu resonansi pada kapal yang bersandar, yang akan sangat mengganggu kegiatan logistik di pelabuhan. Optimalisasi rasio celah terbukti krusial untuk meminimalkan gerakan kapal (vessel motion) dan mencegah kecelakaan logistik maritim. Temuan ini memberikan dasar teknis bagi desain infrastruktur pelabuhan yang tangguh di wilayah pesisir rawan gelombang.

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