Kajian Morfologi Muara Sungai Donan Cilacap Jawa Tengah

Viani, Delfira Lisa (2024) Kajian Morfologi Muara Sungai Donan Cilacap Jawa Tengah. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Muara Sungai Donan menjadi salah satu muara dengan aktivitas lalu lintas kapal atau
jalaur pelayaran di Pantai Selatan Pulau Jawa. Lokasi dermaga dan pelabuhan yang berada di
muara sungai ini, menjadikan rawan terhadap pengaruh erosi dan sedimentasi yang dapat
mempengaruhi alur pelayaran kapal. Terganggunya aktivitas pelayaran akibat sedimentasi akan
meningkatkan biaya operasi pelabuhan dan mengurangi profit margin. Kajian morfologi muara
Sungai Donan dilakukan dengan menganalisis pola arus dan sebaran sedimen melalui aplikasi
model hidrodinamika Delft3D. Data masukkan yang digunakan berupa data gelombang, pasang
surut, debit sungai, batimetri, dan data analisis sedimen di daerah penelitian. Dilakukan validasi
terhadap data pasang surut dan arus pada pemodelan ini. Dari hasil pemodelan yang telah
tervalidasi kemudian dianalisis mengenai pola arus yang terbentuk akibat arus pasang surut
dalam kondisi (pasang purnama dan pasang perbani) dan distribusi sedimen di wilayah perairan
lokasi studi.
Hasil penelitian menunjukkan terdapat kecepatan maksimum arus saat surut purnama
melebihi 1 m/s dengan peningkatan arus dari pasang purnama. Arah arus saat surut purnama
mengarah ke timur sejajar pantai Teluk Penyu dan ke selatan menjauhi Pantai Teluk Penyu.
Kondisi perbani kecepatan maksimum 0,8 m/s. Kecepatan maksimum saat perbani mencapai
0,8 m/s dengan arah arus ke selatan, serta terjadi perepecahan arah arus di muara akibat
pertemuan sungai dan laut. Terdapat sebaran sedimen menunjukkan adanya aktivitas
sedimentasi yang signifikan di wilayah sungai dan muara, dengan ketebalan sedimen rata-rata
berkisar antara 0,5 hingga 1 m. Hal ini berdampak pada kebutuhan pengerukan untuk
pemeliharaan alur pelayaran kapal, dengan total volume pengerukan yang diperlukan sebesar
2.235.433,41 m3/ tahun. Hasil penelitian ini memberikan pemahaman yang lebih baik mengenai
dinamika arus dan sebaran sedimen, serta dapat digunakan sebagai dasar untuk perencanaan
pengelolaan dan pemeliharaan alur pelayaran di masa depan.
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The Donan River estuary is one of the key maritime routes for ship traffic on the southern
coast of Java Island. The presence of docks and harbors at this estuary makes it susceptible to
erosion and sedimentation, which can affect navigation channels. Disruptions in shipping
activities due to sedimentation can lead to increased port operation costs and reduced profit
margins. The morphological study of the Donan River estuary was conducted by analyzing
current patterns and sediment distribution using the Delft3D hydrodynamic model. Input data
included wave data, tidal data, river discharge, bathymetry, and sediment analysis data from
the study area. Validation was performed on tidal and current data for this modeling. The
validated model results were then analyzed to understand the current patterns formed by tidal
currents under different conditions (spring tide and neap tide) and the sediment distribution in
the study area's waters.
The study results indicate that maximum current speeds during spring ebb tides exceed 1
m/s, with an increase in current speed from the spring tide. The current direction during the
spring ebb tide is eastward, parallel to the Teluk Penyu beach, and southward, away from the
Teluk Penyu beach. During neap tides, the maximum speed reaches 0.8 m/s. The maximum
speed during neap tides reaches 0.8 m/s with a southward current direction, and there is a split
in current direction at the estuary due to the meeting of river and sea waters. The sediment
distribution shows significant sedimentation activity in the river and estuary areas, with an
average sediment thickness ranging from 0.5 to 1 m. This situation necessitates dredging for
the maintenance of navigation channels, with a total dredging volume requirement of
2,235,433.41 m³ per year. The results of this study provide a better understanding of current
dynamics and sediment distribution and can be used as a basis for future navigation channel
management and maintenance planning.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Muara Sungai Donan, Sedimentasi, Kecepatan Arus, Delft3D, Alur Pelayaran.Donan River Estuary, Sedimentation, Current Speed, Delft3D, Navigation Channel.
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 > TC424 Water levels
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Delfira Lisa Viani
Date Deposited:	12 Aug 2024 03:57
Last Modified:	12 Aug 2024 03:57
URI:	http://repository.its.ac.id/id/eprint/113131

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