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Jurnal Karajata Engineering
Published by Universitas Muhammadiyah Parepare
ISSN : -     EISSN : 27755266     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
JURNAL KARAJATA ENGINEERING adalah jurnal ilmiah pada bidang Teknik Sipil yang diterbitkan oleh Fakultas Teknik Universitas Muhammadiyah Parepare. Jurnal KARAJATA ENGINEERING berisi tulisan yang diangkat dari hasil penelitian pada bidang Teknik Sipil yang mencakup bidang penelitian Struktur, Transportasi, Keairan, Manajemen Konstruksi, Informatika Teknik Sipil dan bidang lain yang relevan
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 4 Documents
 1 
Search results for , issue "Vol. 6 No. 1 (2026): 2026" : 4 Documents clear
Analisis Karakteristik Aliran Fluida pada Sambungan Pipa PVC dan Pipa Besi dengan Belokan 90° Antaria, Sukmasari; Amir Zainuddin, Muh.; Nasrullah; Arramadana, Rifky
Jurnal Karajata Engineering Vol. 6 No. 1 (2026): 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/karajata.v6i1.3802

Abstract

Fluid flow in piping systems with elbow joints often causes changes in flow characteristics that can lead to energy loss, so it is important to analyze this in the design of efficient piping systems. This study aims to analyze the characteristics of fluid flow in PVC and iron pipe joints with a 90° bend. The study was conducted experimentally from November to December 2024 using a fluid friction apparatus to observe the effect of changes in flow rate on pressure and flow velocity inside the pipe. Data were obtained by measuring the pressure upstream and downstream of the bend, then analyzed using the Reynolds number and Froude number approaches. The results showed that the characteristics of the PVC pipe joint 90° with the largest Froude number value of 0.314 while the iron pipe joint 90° with the largest Froude number value of 0.296. An increase in flow rate caused an increase in flow velocity and energy loss due to friction and changes in flow direction. The flow characteristics that occurred were in laminar and subcritical flow conditions. In addition, differences in pipe materials affect flow characteristics, with PVC pipes tending to produce less energy loss than iron pipes. The results of this study are expected to serve as a reference in the analysis and design of piping systems, particularly in the use of 90° bends.
Analisis Numerik Dampak Pembangunan Jetty terhadap Dinamika Morfologi di Muara Sungai Jeneberang dengan Model Delft3D Israil; Al Imran, Hamzah; Nur Fikry, Muhammad; Rizky Sahabudin, Ahmad
Jurnal Karajata Engineering Vol. 6 No. 1 (2026): 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/karajata.v6i1.3830

Abstract

The Jeneberang River plays a vital role in flood control for Makassar City and Gowa Regency. However, it faces severe sedimentation problems following the landslide at Mount Bawakaraeng, which released approximately 200 million m³ of mud and sand into downstream areas. Sedimentation at the estuary reduces the river’s discharge capacity to the sea and significantly disrupts fishing vessel accessibility in the Tanjung Bunga area. This study aims to analyze coastal morphological dynamics and evaluate the effectiveness of jetty construction in controlling sediment accumulation using numerical simulations with Delft3D. The data employed include bathymetry, tides, currents, and sediment characteristics obtained from BMKG and Ina-Geoportal. Simulation results indicate substantial sediment buildup at the estuary prior to jetty construction. After the jetty was introduced, sediment concentration at the river mouth decreased markedly from 1.4 kg/m³ to 0.16 kg/m³ by the end of the simulation period. Morphologically, the jetty reduces current energy and alters sediment transport pathways, thereby maintaining the stability of the navigation channel. The novelty of this study lies in its quantitative evaluation of jetty effectiveness under extreme sediment supply conditions caused by large-scale upstream landslides, providing numerical-based evidence for jetty performance in highly sediment-laden estuaries. These findings confirm that jetty construction is an effective engineering solution to sustain navigation channels and support the continuity of local fishing activities.
Evaluasi Efektivitas Soil Bioengineering Berbasis Vegetasi Pinus terhadap Pengendalian Sedimen di Lereng DAS Jene’berang Mahmuddin; Ali, Muhammad Yunus; Asdin Agus Salim, Muh.
Jurnal Karajata Engineering Vol. 6 No. 1 (2026): 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/karajata.v6i1.4136

Abstract

The Jene'berang River Basin is one of the main river basins in South Sulawesi Province, which has a high level of sedimentation and landslide vulnerability due to a combination of factors, including steep topography, unstable soil types, high rainfall, and changes in land use. This study aims to analyze the effectiveness of applying pine vegetation-based bioengineering technology in sediment control in the Jene'berang-Jenelata watershed. The research method was conducted from January to June 2025 through field observations, spatial analysis using Geographic Information Systems and measurements of sediment landslide volumes at several variations of pine vegetation planting distances. The parameters analyzed included soil classification, land activity, slope gradient, rainfall, and sediment landslide volume. The results showed that the application of bioengineering had an effect on sediment control, with variations in vegetation planting distance affecting the volume of landslides that occurred. Wider planting distances showed higher sediment retention efficiency compared to very dense planting distances. The appropriate and integrated application of bioengineering technology with the physical characteristics of the watershed is expected to be a sustainable solution for sediment control and landslide mitigation in the Jene'berang watershed.
Infiltrasi Petroleum Hydrocarbon pada Air Sumur Gali di Jalan X Kecamatan Gresik Suprihatin, Hasti; Asrin, M.; Andi Saputra, Akhmad; Ikhtisholiyah
Jurnal Karajata Engineering Vol. 6 No. 1 (2026): 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/karajata.v6i1.4264

Abstract

Groundwater obtained from dug wells serves as the main domestic water source for communities along Jalan X, Kecamatan Gresik. Recently, oil contamination detected in several wells has raised significant environmental and public health concerns, while the pollution source has not been clearly identified. This study aims to assess Total Petroleum Hydrocarbon or TPH concentrations in dug well water and to determine the primary source of contamination. A case study with a descriptive quantitative approach was conducted through field observations and laboratory analysis of groundwater samples from three affected wells. TPH levels were measured using gas chromatography–flame ionization detector or GC-FID and evaluated against drinking water quality standards established by the Indonesian Ministry of Health Regulation No. 32 of 2017. The results showed TPH concentrations up to 2.5 mg/L, exceeding the safe drinking water threshold by 25-fold. The major finding identifies the contamination source as a leaking domestic drainage channel located only six meters from the wells, which violates the standard safe distance. This channel carries hydrocarbon waste from adjacent vehicle workshops, infiltrating the shallow aquifer. Therefore, immediate reconstruction of the drainage using pre-cast U-ditch and provision of a piped water system are necessary to protect community health.

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