Studi Dampak Hidraulika dan Sedimentasi Akibat Reklamasi Di Sekitar Muara Kali Mireng, Gresik

Narendra, Gede Manik Aryadatta (2023) Studi Dampak Hidraulika dan Sedimentasi Akibat Reklamasi Di Sekitar Muara Kali Mireng, Gresik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sungai mireng merupakan sungai yang terletak di kabupaten Gresik dan bermuara di selat Madura. Muara sungai mireng menjadi tempat mencari mata pencaharian masyarakat seperti nelayan, pariwisata bakau, dan sektor industri. Di sekitar muara sungai mireng terdapat dua kawasan industri yaitu JIIPE (Java Integrated Industrial Port and Estate) dan PT. Siam Maspion Terminal. Kedua kawasan industri tersebut direncanakan akan melakukan reklamasi untuk mengatasi permasalahan ruang yang kian menyempit. Fenomena hasil interaksi dinamika laut dan lingkungan akibat kegiatan reklamasi berpotensi merubah pola arus, tinggi gelombang, dan proses sedimentasi yang dikhawatirkan dapat mempengaruhi kegiatan masyarakat disekitar muara sungai mireng. Pada Tugas Akhir ini akan dibahas perubahan kondisi hidrodinamika dan sedimentasi akibat reklamasi disekitar muara sungai mireng, pemodelan dilakukan menggunakan software Delft3D. Hasil dari pemodelan didapatkan pola arus dan kecepatan arus yang terjadi sebelum dan sesudah adanya reklamasi mengalami perubahan. Terjadi penurunan tinggi gelombang pada titik pengamatan 1, 2, 3, 4, 5, 8, dan 10 akibat terhalang reklamasi. Sedangkan untuk sedimentasi kondisi eksisting yang terjadi sebesar 9719 m3 selama 1 tahun dan sedimentasi kondisi reklamasi tertinggi terjadi pada skenario model 4 sebesar 22.195 m3 selama 1 tahun. Upaya penanggulangan dampak lingkungan akibat reklamasi dapat dilakukan dengan metode sediment trap dan capital dredging. Sediment Trap dapat mengurangi sedimentasi sebesar 36% selama 1 tahun dan waktu prediksi melakukan pengerukan kembali dalam 10 Tahun.
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Mireng River is in the Gresik district and empties into the Madura Strait. The Mireng River estuary is a place to find people's livelihoods, such as fishing, mangrove tourism, and the industrial sector. Around the Mireng River estuary are two industrial estates, namely JIIPE (Java Integrated Industrial Port and Estate) and PT Siam Maspion Terminal. Both industrial areas are planned to carry out reclamation to overcome the problem of shrinking space. The interaction of ocean dynamics and the environment due to reclamation activities can change current patterns, wave heights, and sedimentation processes, which are feared to affect community activities around the Mireng River estuary. This Final Project will discuss changes in hydrodynamics and sedimentation conditions due to reclamation around the Mireng River estuary. Modeling is done using Delft3D software. The modeling results obtained current patterns and velocities that occur before and after reclamation have changed. There is a decrease in wave height at observation points 1, 2, 3, 4, 5, 8, and 10 due to reclamation obstruction. As for sedimentation, the existing condition amounted to 9719 m3 for one year and the highest reclamation condition sedimentation occurred in model scenario 4 of 22,195 m3 for one year. Efforts to mitigate environmental impacts due to reclamation can be made with the sediment trap and capital dredging methods. Sediment Traps can reduce sedimentation by 36% for one year and the predicted time to re-dredge in 10 years.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	DELFT3D, Tinggi Gelombang, Pola Arus, Reklamasi, Sedimentasi. DELFT3D, Wave Heights, Current Pattern, Reclamation, Sedimentation.
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC175.2 Sediment transport T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	GEDE MANIK ARYADATTA NARENDRA
Date Deposited:	25 Jul 2023 06:07
Last Modified:	25 Jul 2023 06:07
URI:	http://repository.its.ac.id/id/eprint/99273

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