Pemetaan Potensi Hasil Sedimentasi dan Pemanfaatannya dalam Penentuan Lokasi Prioritas terhadap Perubahan Morfologi di Pesisir Utara Gresik

Pratama, Ashof Habil (2026) Pemetaan Potensi Hasil Sedimentasi dan Pemanfaatannya dalam Penentuan Lokasi Prioritas terhadap Perubahan Morfologi di Pesisir Utara Gresik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kawasan pesisir utara Gresik merupakan wilayah pesisir yang dinamis dengan tingkat sedimentasi tinggi akibat interaksi arus, gelombang, pasang surut, dan suplai sedimen dari daratan. Kondisi ini mendorong perlunya pemetaan potensi hasil sedimentasi serta penentuan lokasi prioritas pemanfaatannya terhadap perubahan morfologi di wilayah tersebut. Penentuan lokasi prioritas dilakukan menggunakan pendekatan Multi Criteria Decision Making (MCDM) dengan metode Entropy untuk pembobotan kriteria secara objektif dan Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) untuk perankingan, terhadap sembilan kriteria pada 14 lokasi usulan yang diolah menggunakan Sistem Informasi Geografis (SIG). Hasil analisis menunjukkan Muara Kalianyar sebagai lokasi prioritas tertinggi (Ci = 0,9909), diikuti Muara Sungai Randuboto, Sungai Leba'an, dan Muara Kali Pandikan. Perubahan morfologi pada keempat lokasi prioritas tersebut selanjutnya disimulasikan menggunakan model Delft3D pada kondisi eksisting dan pasca pengerukan, untuk musim barat dan musim timur. Hasil pemodelan menunjukkan akumulasi sedimen yang konsisten di sekitar mulut muara, dengan intensitas lebih tinggi pada musim barat, serta kecenderungan pengisian kembali (backfilling) pasca pengerukan yang bersifat musiman sehingga mengindikasikan kebutuhan pengerukan pemeliharaan berkala. Berdasarkan karakteristik materialnya, sedimen berpasir di wilayah utara-barat berpotensi dimanfaatkan sebagai material reklamasi dan konstruksi, sedangkan sedimen berlempung di wilayah timur lebih sesuai untuk rehabilitasi ekosistem mangrove dan tambak. Hasil penelitian ini dapat menjadi dasar teknis dalam perencanaan pengelolaan sedimentasi pesisir utara Gresik yang lebih objektif, terukur, dan berkelanjutan.
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The northern coast of Gresik is a dynamic coastal region with a high sedimentation rate resulting from the interaction of currents, waves, tides, and sediment supply from land, which requires mapping of sedimentation output potential and determination of priority utilization locations relative to the morphological changes occurring in the area. Priority locations were determined using a Multi-Criteria Decision Making (MCDM) approach, combining the Entropy method for objective criteria weighting and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) for ranking, applied to nine criteria at 14 candidate locations processed using a Geographic Information System (GIS). The analysis shows that the Kalianyar Estuary is the highest-priority location (Ci = 0.9909), followed by the Randuboto River Estuary, the Leba'an River, and the Kali Pandikan Estuary. Morphological changes at these four priority locations were subsequently simulated using the Delft3D model under existing and post-dredging conditions, for both the west and east monsoon seasons. The modeling results show a consistent sediment accumulation pattern around the estuary mouths, with a higher intensity during the west monsoon, together with a seasonal backfilling tendency after dredging, indicating the need for periodic maintenance dredging. Based on its material characteristics, sandy sediment in the northwestern area has the potential to be used as reclamation and construction material, while clayey sediment in the eastern area is more suitable for mangrove ecosystem and pond rehabilitation. The results of this study can serve as a technical basis for planning a more objective, measurable, and sustainable management of sedimentation along the northern coast of Gresik.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Sedimentasi, Entropy-TOPSIS, pemodelan morfologi, pengerukan, Gresik. Sedimentation, Entropy-TOPSIS, morphological modeling, dredging, Gresik.
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.5.I4 Remote sensing Q Science > QE Geology > QE571 Sedimentation and deposition. Sediment transport. Erosion. T Technology > T Technology (General) > T57.62 Simulation T Technology > TC Hydraulic engineering. Ocean engineering > TC187 Dredging
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Ashof Habil Pratama
Date Deposited:	15 Jul 2026 08:57
Last Modified:	15 Jul 2026 08:57
URI:	http://repository.its.ac.id/id/eprint/135032

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