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Agusdiansyah, Dwi
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Environmental Science Industrial & Manufacturing Engineering

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SEBARAN SEDIMEN DI DEGO-DEGO, SULAWESI SELATAN Wahab, Ghayatri Gita Shafira; Agusdiansyah, Dwi
Riset Sains dan Teknologi Kelautan Volume 6, Nomor 1, Tahun 2023
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/sensistek.v6i1.24260

Abstract

Dego-dego yang merupakan wilayah pesisir di Bulukumba, Sulawesi Selatan. Wilayah perairan Dego-dego berbatasan langsung dengan laut flores, wilayah Dego-dego memiliki berbagai aktivitas seperti aktivitas pariwisata dan aktivitas ekonomi yang dapat merubah tatanan lingkungannya, perubahan tatanan lingkungan tersebut dapat terpengaruh oleh salah satu faktor, yaitu arus dan sedimentasi yang terjadi di wilayah perairan tersebut. Studi yang telah dikerjakan dalam penelitian ini adalah studi dengan memakai metode kuantitatif, yaitu metode dengan menggunakan analisis dengan model. Faktor sedimentasi merupakan proses dari perpecahan atau pelapukan batuan atau material organik yang tertranspor oleh gletser, air ataupun angin. Proses transport sedimen dipengaruhi oleh arus sehingga dapat membentuk pola sebaran sedimentasi yang berada di wilayah Dego-dego. Pasang surut menjadi parameter pembentuk pola sebaran arus. Sebaran sedimentasi diperoleh dengan menggunakan model numerik untuk menyimulasikan pola sebaran arus dan pola sebaran sedimen dalam skema 2D. Hasil pemodelan numerik ini menunjukkan bahwa sedimen bergerak perlahan dengan mengendapkan butiran sedimennya sehingga membentuk perubahan garis pantai, peralihan tatanan garis pantai tersebut dapat berpengaruh terhadap tatanan lingkungan wilayah Dego-dego. Metode pemodelan dilakukan menggunakan software MIKE 21 untuk memperoleh data hidro-osenografi melalui modul Coupled Model FM.
PEMODELAN ARUS SUNGAI TALLO MAKASSAR MENGGUNAKAN SOFTWARE PEMODELAN NUMERIK Agusdiansyah, Dwi; Paotonan, Chairul; Rahman, Sabaruddin
Riset Sains dan Teknologi Kelautan Volume 7, Nomor 1, Tahun 2024
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/sensistek.v7i1.31650

Abstract

Tallo River is located in Makassar City, South Sulawesi, and has an important role in the Mamminasata region. The flow of the Tallo River that crosses the center of Makassar City has a strategic location in the urban area of Mamminasata. Ocean currents refer to the movement of water masses, both horizontally and vertically, that reach equilibrium. Factors that affect ocean currents include pressure gradients, winds, pressure or density differences, and tides. In many waters, the main factors affecting the strength of currents are wind and tides. The data used in this study included riverbank line data from Google Earth Pro, tidal data measured directly in the field from two different points, namely the Monkey pier and the Tallo pier, bathymetric data used to create an unstructured network taken directly in the field, and wind data obtained from ECMWF. The results showed that the water level in the Tallo River, Makassar, South Sulawesi was influenced by tides. At low tide, the river flow flows towards the mouth of the river, while at high tide, the direction of the river flow towards the upper reaches of the river with the current rotating in certain locations. The water level in the Tallo River ranges from 0.8 to 2.2 meters, and the current speed varies between 0.015 to 0.21 m/s.
ANALISIS POTENSI PEMANFAATAN SUNGAI TALLO MAKASSAR SEBAGAI ALUR PELAYARAN Agusdiansyah, Dwi; Paotonan, Chairul; Rahman, Sabaruddin
Riset Sains dan Teknologi Kelautan Volume 7, Nomor 2, Tahun 2024
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/sensistek.v7i2.41678

Abstract

One of the rivers with potential for development into a river transportation system in the city of Makassar is the Tallo River, which is approximately 22.2 km long. This river can connect the Tamalanrea sub-district with the coastal area of Makassar. Currently, the Tallo River is utilized as a transportation route to Lakkang Island, which is one of the tourist destinations. Based on the relatively wide characteristics of the river, the Tallo River can accommodate vessels with a relatively large draft. However, a study is needed to determine the maximum draft of vessels that can operate in the river based on water depth and air clearance at the Reformasi Toll Bridge. The objective of this research is to determine the maximum draft and freeboard of vessels that can operate in the Tallo River, identify areas of shoaling, and calculate the volume of dredging required. The research begins with literature review, collection of secondary and primary data, data analysis, and identification of shoaling points for calculating dredging volume. The data collected includes bathymetric data, tidal data, current data, bottom sediment data, and river discharge data. Based on the data analysis results, the maximum vessel draft before dredging is 1.0 m LWL with an air clearance of 1.9 m from the high tide water level. After dredging, the draft of vessels that can use the Tallo River is 1.5 m LWL. The locations requiring dredging are 13 points, with a total dredging volume of 1283.49.
Co-Authors Chairul Paotonan Sabaruddin Rahman Wahab, Ghayatri Gita Shafira