Analisis Sedimentasi Kanal Pelayaran Ujungpangkah Gresik

Zexel, Muhayory (2024) Analisis Sedimentasi Kanal Pelayaran Ujungpangkah Gresik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ujungpangkah merupakan salah satu wilayah di Kabupaten Gresik, Jawa Timur yang
mengalami sedimentasi akibat akresi. Akresi memiliki dampak positif dan dampak negatif
terhadap lingkungan. Salah satu dampak negatifnya adalah pendangkalan kanal pelayaran.
Selain diakibatkan akresi, pendangkalan pada kanal pelayaran juga disebabkan oleh
longsornya lereng kanal. Proses ini menyebabkan sedimen di dasar kanal semakin menumpuk
dan menghambat pergerakan kapal. Oleh karena itu, dilakukan upaya untuk menanggulangi
laju sedimentasi di area kanal dengan membangun kanal baru dan pemasangan pipa fluidisasi
Dalam penelitian ini akan dilakukan dua aspek pemodelan yaitu pemodelan transport sedimen
menggunakan software Delft3D dan pemodelan stabilitas lereng menggunakan software
Geostudio Slope/W. Data yang digunakan dalam analisis hidrodinamika adalah data sedimen,
data batimetri, data arus,data angin, dan data pasang surut. Sedangkan dalam analisis
stabilitas lereng dibutuhkan paramater tanah yaitu berat jenis tanah, kohesi tanah, sudut gesek
dalam tanah, dan data lapisan tanah. Hasil pemodelan dengan software Delft3D dalam kondisi
eksisting pada area alur pelayaran Ujungpangkah menunjukkan sedimentasi sebesar 71.103
m3
atau laju sedimentasi sebesar 0,66 m/tahun. Pemodelan stabilitas lereng dengan Geostudio
Slope/W mendapatkan faktor keamanan sebesar 1,36 untuk kemiringan 1:1 dan angka
keamanan pada kemiringan 1:1,5 dan 1:2 masing-masing sebesar 1,507 dan 1,711. Dalam
perencanaan kanal baru digunakan kemiringan lereng 1:2. Hasil pemodelan dengan Delft3D
setelah pembangunan kanal baru diperoleh sedimentasi sebesar 69.839 m3
atau laju
sedimentasi sebesar 0,65 m/tahun. Setelah dipasang pipa fluidisasi sedimentasi menurun
menjadi sebesar 61.448 m3
atau laju sedimentasi sebesar 0.57 m/tahun
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The Ujungpangkah area is one of the areas in Gresik Regency, East Java that has
experienced sedimentation due to accretion. Accretion has positive and negative impacts on
the environment, one of the negative impacts is siltation of the shipping canal. In addition to
accretion, siltation of the shipping canal is also caused by landslides of the canal slope. This
process causes sediments at the bottom of the canal to accumulate and hinder the movement
of ships. Therefore, efforts were made to overcome the sedimentation rate in the canal area by
building a new canal and installing fluidization pipes. In this research, two aspects of
modeling will be carried out, namely sediment transport modeling using Delft3D software
and geotechnical modeling using Geostudio Slope/W software. The data used in
hydrodynamic analysis are sediment data, bathymetry data, current data, wind data, and tidal
data. While in geotechnical analysis, soil parameters are needed, namely soil specific gravity,
soil cohesion, friction angle in soil, and soil layer data. Modeling results obtained with
Delft3D software in existing conditions in the Ujungpangkah shipping channel area amounted
to 71,103 m3 while after the new canal was built it amounted to 69,839 m3
. The results of
Geostudio Slope / W modeling with a slope of 1: 1 get a safety factor of 1.36 and a slope of 1:
1.5 get a safety factor of 1,507. After the fluidization pipe is installed, the sedimentation
reduced to 61,448 m3 or the sedimentation rate is 0.57 m / year

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Delft3D, Geostudio Slope/W, Slope stability, Delft3D, Geostudio Slope/W, Stabilitas lereng
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC175.2 Sediment transport T Technology > TC Hydraulic engineering. Ocean engineering > TC187 Dredging
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Muhayory Zexel
Date Deposited:	08 Aug 2024 02:02
Last Modified:	08 Aug 2024 02:02
URI:	http://repository.its.ac.id/id/eprint/111605

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