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TRANSMISI GELOMBANG MELALUI STRUKTUR BAWAH AIR BERBAHAN GEOTEXTILE TUBE SEBAGAI PELINDUNG PANTAI PASIR BUATAN Allo, Daniel Bara Padang; Paotonan, Chairul
JURNAL RISET TEKNOLOGI KELAUTAN Vol 10, No 2 (2012)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

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Abstract

Perlindungan pantai pasir buatan dari ancaman erosi akibat gempuran gelombang dilakukandengan pembangunan pelindung pantai. Permasalahan yang timbul dengan dibangunnya konstruksipelindung pantai tersebut adalah terganggunya keindahan dan kenyamanan pantai (puncak strukturyang muncul ke permukaan), bahan konstruksi yang tidak ramah lingkungan, dan biaya yang cukupmahal. Geotextile tube (geotube) sebagai pemecah gelombang bawah air merupakan salah satualternatif bangunan pelindung pantai pasir buatan terhadap erosi. Informasi teknis tentang transmisigelombang melalui struktur ini masih sangat terbatas. Penelitian dilakukan dengan menggunakanmodel fisik 2D untuk mencari parameter-parameter yang berpengaruh terhadap transmisigelombang. Model dibuat dari kain menyerupai geotube kemudian diisi pasir dengan caramemvariasi tinggi struktur (hs) terhadap kedalaman di lokasi struktur (ds) (hs/ds: 0,72, 0,86, 0,90,1,00). Demikian juga untuk mengetahui pengaruh parameter lebar struktur (B), lebar model divariasidengan mempertahankan tinggi struktur (hs). Dengan memvariasi periode dan tinggi gelombangyang melewati struktur yang ditempatkan di dalam saluran gelombang sebelumnya, penelitimelakukan pengamatan dan pengukuran tinggi gelombang di depan dan di belakang struktur. Hasilpenelitian menunjukkan bahwa transmisi gelombang melalui struktur ini dipengaruhi oleh parameterstruktur (hs/ds) dan parameter gelombang (H0/gT2). Dengan regresi multi parameter didapatkanformula koefisien transmisi 0,606 0,690.( / ) 0,116.ln( / ) 20 K h d H gT t s s    . Parameter lebar struktur (B)dalam penelitian ini tidak terlalu berpengaruh terhadap transmisi gelombang karena adanyahamparan pasir di belakang struktur.
METODE SEDERHANA PENENTUAN DIMENSI GEOTEXTILE TUBE (GEOTUBE) SEBAGAI STRUKTUR PELINDUNG PANTAI Paotonan, Chairul
JURNAL RISET TEKNOLOGI KELAUTAN Vol 10, No 2 (2012)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

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Abstract

Beberapa eberapa eberapa tahun terakhir, material untuk bangunan pantai mulai sulit diperoleh dan relative mahal menyebabkan pergeseran penggunaan material konvensional ke material yang lebih murah dan mudah diperoleh seperti material geosintetik. Material geosintetik yang semakin meningkat penggunaannya akhir-akhir ini adalah geotextile tube (geotube). Permasalahannya, metode penentuan parameter teknis geotube belum tersedia pedoman bakunya. Penelitian ini bertujuan untuk mengkaji metode penentuan dimensi geotube. Penelitian dimulai dari pengembangan teori, pembuatan model geotube dan pelaksanaan eksperimen. Parameter yang divariasikan adalah jenis dan faktor pengisian (fill factor,FF) pasir pengisi. Pasir yang digunakan adalah pasir Patehan, Laboratorium dan Tanjung An. Sedangkan factor pengisian ditetapkan 1,0; 0,9; 0,8; 0,7 dan 0,6. Pengukuran tinggi dan lebar geotube dilaksanakan pada dua kondisi, yaitu kondisi kering dan kondisi terendam. Hasil penelitian menunjukkan bahwa terdapat hubungan yang baik antara dimensi geotube dengan nilai FF. Teori yang dikembangkan untuk menentukan dimensi geotube bersesuaian dengan data eksperimen untuk nilai FF besar dari 0,8 (80%) dan pasir dengan gradasi yang baik. Persamaan 4 dan 5 dapat digunakan untuk menentukan dimensi geotube. Tinggi geotube di air lebih kecil dibandingkan di udara. Hasil yang diperoleh pada Persamaan 4 dan 5 harus ditambahkan 5% jika geotube terendam dalam air.
PEMODELAN FISIK GELOMBANG MELALUI TIANG BAMBU SEBAGAI PELINDUNG TANAMAN BAKAU Paotonan, Chairul
JURNAL RISET TEKNOLOGI KELAUTAN Vol 11, No 1 (2013)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

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Abstract

Kerusakan pantai di Indonesia disebabkan oleh peristiwa alamiah dan aktivitas manusia. Aktivitasmanusia yang banyak merusak pantai adalah penambangan pasir pantai dan penebangan hutanbakau. Areal hutan bakau yang telah ditebang, dengan sangat mudah akan mengalami erosi akibatgelombang laut. Penanam kembali pohon bakau adalah salah satu solusi yang dapat dilakukanuntuk menangani permasalahan tersebut. Masalahnya, pohon bakau yang baru ditanam banyakhilang akibat hempasan gelombang. Oleh sebab itu, dibutuhkan pelindung sementara. Salah satualternative untuk melindungi pohon bakau yang masih mudah adalah dengan menggunakan tiangtiangbambu. Kinerja tiang bambu dalam melindungi bakau yang masih mudah dapat dilihat daribesarnya rasio antara tinggi gelombang yang melewati tiang bambu ke areal bakau dengan tinggigelombang di depan tiang dan dinamakan koefisien transmisi. Semakin kecil gelombang yangmelewati tiang bambu, semakin baik dalam melindungi tanaman bakau. Penelitian ini pemodelanfisik 2 dimensi di laboratorium untuk mengetahui pengaruh parameter tiang bambu dangelombang dalam melindungi tanaman bakau, yang dievaluasi dari nilai koefisien transmisi Hasildari penelitian ini diharapkan dapat dijadikan acuan dalam perencanaan tiang untuk melindungiarea penanaman bakau. Hasil yang diperoleh menunjukkan bahwa semakin rapat tiang vertikaldan semakin curam gelombang, koefisien transmisi semakin mengecil.
Kajian Keselamatan Peroses Bongkar Muat Barang Yang Menimbulkan Cacat Produk Muatan Di Pelabuhan Paotere Phady, Adriani; Rachman, Taufiqur; Paotonan, Chairul
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 1, Nomor 3, Edisi November 2020
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v1i3.12012

Abstract

This article discusses the worker's safety assessment of the loading and unloading process that causes cargo product defects at Paotere Harbour. Makassar, which is the capital of South Sulawesi province, is known as the city with the largest majority population and is a dense flow of inter-island freight traffic. One of the Harbours that transportation the economy in Makassar is the Harbour of Paotere which provides dock services for fishing boats, passenger ships and cargo ships. Phinisi motor sailing ships are equipped with lifting equipment, namely cranes that can lift goods to facilitate the loading and unloading process of goods from the ship to the edge of the pier. However, the loading and unloading process ignores the safety and health aspects of work on the deck of the ship and on the dock. In addition, the results of the products being trans Harboured must also be considered if someone experiences product defects due to loading and unloading activities at the Harbour of Paotere. J-hook, a tool used to lift and move the sack by stabbing it in any place, can cause the sack to tear and the grain inside will slowly spill out due to gaps in the sack. The method used in this research is the descriptive method, namely: providing an overview of certain phenomena or certain aspects of the location under study. Descriptive methods are not only limited to data collection but include direct observation and interviews with workers. The strategic solution needed is the replacement of the cargo lift knot rope on the crane with a mooring rope net that facilitates the lifting process from the ship's deck to the Paotere Harbor pier. Replacing the J-hook whose function is to shift and flip the sack with an enlarged Jar Lifter tool and an adjustment of the material that is comfortable to hold and is not dangerous if it falls and hits the limbs of workers who are carrying out loading and unloading activities Paotere Harbor.
In Use of Permeable Groin for Reducing Longshore Sediment Transport at Tanjung Bayang Beach of South Sulawesi Umar, Hasdinar; Rahman, Sabaruddin; Paotonan, Chairul; Baeda, Ahmad Yasir
EPI International Journal of Engineering Vol 1 No 2 (2018): Volume 1 Number 2, August 2018 with Special Issue on Railway Engineering
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.082018.11

Abstract

Breaking wave near beaches is the main force to generate longshore currents, which moved the sediment at surrounding area. Due to its negative outcome, which are erosion and sedimentation, the need of longshore sediment transport analysis become very important. One of the tools for solving that problem is by using coastal protection structure such as permeable groin. Permeable groin may reduce the rate of longshore sediment transport respectively by changing the level of permeability of the groin itself. The objective of this research was to obtain analytical results of the longshore sediment transport reduction analysis by using permeable groins at Tanjung Bayang Beach of South Sulawesi. Reduction of sediment transport along the beach was analyzed by calculating reduction coefficient, which is the ratio between the longshore current before and after hitting the permeable groins. The result showed that with 40% of permeability, the groin can reduced longshore sediment transport at Tanjung Bayang Beach for almost 50%; from 341.37x103 m3/year to 170.68x103 m3/year.
Analisa Ukuran Butiran Sedimen Pantai Desa Aeng Kabupaten Takalar dan Pantai Padongko Kabupaten Barru Umar, Hasdinar; Rachman, Taufiqur; Rahman, Sabaruddin; Paotonan, Chairul; Baeda, Achmad Yasir; Taufiqurrahman, Taufiqurrahman; Alkhaer, Ilham
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 1, Nomor 1, Edisi Maret 2020
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v1i1.9653

Abstract

Beach is an area that is physically subject to change. This change is caused by natural processes and human activities. Physical changes that generally occur on the beach are erosion and sedimentation. The dynamic processes that occur atthe beach are the result of a combination of various forces at work on the beach, which include the force of waves,currents, sedimentary movements, wind and so on. To analyze sediment transport in coastal areas, one of the main thingsthat need to be known is the characteristics of coastal sediments. The study was carried out on beaches prone to erosion and sedimentation, the location of sample data research at several points taken in the area around the Aeng TakalarVillage Beach and Padongko Barru Beach. The analysis carried out is the analysis of the distribution of sediment grainsto determine the characteristics of existing sediments on the beach. The results showed that the sizes of the sediment samples on the beach in Aeng Village, Takalar District were a mixture of fine sand and medium sand which had a diameterof 0.125 mm - 0.5 mm and the size of the sediment grains on the Padongko beach. Kabru was a mixture of fine sand and medium sand which has a diameter of 0.125 - 0.5 mm.
Analisis Kapasitas Teknis Struktur Dermaga Pelabuhan Lampia Paotonan, Chairul; Rahman, Sabaruddin; Mas’ud M, Ahmad Azwar; Putra, Teguh Pairunan
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 1, Nomor 2, Edisi Juli 2020
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v1i2.10834

Abstract

PT. Sinergi Perkebunan Nusantara plans to use the Lampia port for shipping of Crude Palm Oil (CPO). Lampia Jetty has more than ten years old so that its carrying capacity against external loads may have decreased. Therefore for the operational safety of the ship, it is necessary to study the engineering capacity of the pier. By knowing the engineeringcapacity of the existing pier, the maximum ship dimensions that can be served by pier can be determined. This study began with the collection of supporting data consisting of ship data, hydro-oceanographic data, bathymetry data, pier structure data and earthquake data. Furthermore, the load calculation that works on the pier consists of dead and live loads, earthquake loads, ship impact loads, current loads, wave loads, ship tensile loads and wind loads. After the load calculation is completed, then the pier modeling is done using SAP2000 software followed by inputting the load using aspecific combination of loading and running model. In this study the dimensions of the ship were varied namely 500 ton, 700 ton, 1000 ton, 2000 ton and 3000 ton. The indicator used in assessing the technical capacity of the pier is the safety factor (SF) as a function of the ship DWT. Based on the results of the strength analysis of the pier structure, it wasfound that the existing pier is capable and safe serving ships with a size of 27 1027 DWT if it uses a safety factor (SF) 1.5. Whereas if use the safety factor (SF) 2.0, the existing pier structure is capable and safe to service ships with a size of ≤ 510 DWT.