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All Journal Jurnal Konstruksia JURNAL SIPIL SAINS SemanTIK : Teknik Informasi Civil Engineering Journal Rancang Bangun Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat INTEK: Jurnal Penelitian Stabilita : Jurnal Ilmiah Teknik Sipil Fakultas Teknik Universitas Halu Oleo Kendari EPI International Journal of Engineering Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Lowland Technology International Jurnal Teknik Sumber Daya Air Riset Sains dan Teknologi Kelautan Journal of Muhammadiyah’s Application Technology Bambu Laut: Jurnal Pengabdian Masyarakat
Riswal Karamma
Departemen Teknik Sipil, Fakultas Teknik, Universitas Hasanuddin
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Public Health Social Sciences Transportation

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The Revitalization of Makassar Urban Drainage System Based on Eco Drainage Retention Pond Karamma, Riswal; Lopa, Rita Tahir; Hatta, Mukhsan Putra
INTEK: Jurnal Penelitian Vol 8 No 1 (2021): April 2021
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v8i1.2811

Abstract

One of the causes of flooding in Makassar City is the management of the water system that is not optimal. It is necessary to arrange a drainage system to overcome flooding in Makassar City. In this study the topography on Catchment area analysis, analysis of hydrology and hydraulics analysis. Modeling the distribution of flood performed using HEC-RAS applications. This research was conducted in the Tallo watershed which consists of the Upper Tallo sub-watershed and the Mangalarang sub-watershed. The results of the analysis of flood discharge in the Tallo Hilir sub-watershed are 523.76 m3/s and in the Mangalarang sub-watershed are 886.82 m3/s. The flood overflow of the Tallo River spread over 6.48 km2 of Manggala District, 0.31 km2 of Rappocini District, 4.24 km2 of Panakukang District, 3.37 km2 of Tallo District, 11.59 km2 of Tamalanrea District and 0.01 km2 of Biringkanaya District. The total area of flood distribution is 26 km2. The solution to overcome the flooding of the Tallo River with an environmentally sound drainage system, it is necessary to plan the construction of a retention pond in Tamalanrea District, with a normal total storage volume of 2.48 million m3 and a maximum capacity of 5.31 million m3. The construction of this retention pond can reduce 17.7 km2 of flood-affected area.
Hydrological Analysis In Selecting Flood Discharge Method In Watershed Of Kelara River Mustamin, Muhammad Rifaldi; Maricar, Farouk; Karamma, Riswal
INTEK: Jurnal Penelitian Vol 8 No 2 (2021): October 2021
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v8i2.2874

Abstract

For Engineers involved in planning and construction of water resources building, hydrology becomes very important data. In terms of planning stage in water resources especially waterworks, it is known that design flood discharge closed to field realistic conditions is often needed in order that a planned construction is able to control flood discharge. Several previous researches in choosing flood discharge selection method have diverse depending on observed watershed. One method in determining selected flood discharge by verification using Creager diagram, by comparing discharge calculation results of several Synthetic Unit Hydrograph (SUH) with infrastructure flood discharge (AWLR result) in observation point. This research aims to obtain  the most suitable synthetic unit hydrograph and close to analysis result of measured discharge frequency, and Creager diagram in Kelara watershed (DAS). Based on the calculation of design flood discharge according to rainfall data using synthetic unit hydrograph of Nakayasu, ITB I, ITB II, and SCS (HEC-HMS) as well as the calculation of design flood discharge according to collected data, it is concluded that the synthetic unit hydrograph method closest to design flood discharge with measured discharge rate and Q1000 rate of Creager diagram is SCS. Flood discharge rate obtained according to HSS SCS method using HEC-HMS  4.8 application in period of 2 years  is 658,40 m3/s, 25 years is 682,70 m3/s, 50 years is 787,00 m3/s, 100 years is 885,70 m3/det, and 1000 years is 1202,60 m3/s
Pengaruh Jarak Struktur Pemecah Gelombang Model Hybrid Engineering Terhadap Panjang Dan Tinggi Gelombang (Penelitian Laboratorium) Zulmi, Ahmad Syafi'i; Kato, Muh Alvin Achmad; Karamma, Riswal; Kuba, Muhammad Syafa'at S.
Journal of Muhammadiyah’s Application Technology Vol. 1 No. 2 (2022)
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/jumptech.v1i2.8925

Abstract

Hybrid Engineering dibangun dengan menggunakan bahan-bahan yang tersedia secara local seperti kayu, bambu, ranting, dan dahan pohon mangrove. Penelitian ini bertujuan untuk mengetahui nilai refleksi dan transmisi gelombang pada model pemecah gelombang model hybrid engineering, kemudian menganalisi parameter-parameter yang berpengaruh terhadap koefisien refleksi dan transmisi pada pemecah gelombang. Penelitian ini dilakukan di Laboratorium Hidrolika Teknik Sipil Fakultas Teknik Universitas Hasanuddin. Metode yang digunakan berbasis eksperimental. Karakteristik gelombang yang dihasilkan terdiri dua variasi priode dan dua variasi kedalaman air serta dua variasi stroke. Pembacaan puncak dan lembah gelombang dilakukan secara otomatis melalui wave monitor. Dari hasil penelitian dapat disimpulkan semakin besar jarak struktur pemecah gelombang maka gelombang refleksi akan semakin kecil sedang untuk gelombang transmisi yang dihasilkan akan semakin tinggi.
Climate Change Impacts on Rainfall Variability and Adaptive Reservoir Operation in a Multi-Reservoir System Leda, Alexander; Tahir Lopa, Rita; Maricar, Farouk; Karamma, Riswal
Civil Engineering Journal Vol. 11 No. 10 (2025): October
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-10-08

Abstract

Changes in rainfall patterns driven by climate change have altered the hydrological regime of river basins, creating substantial challenges for water resources management, particularly in the operation of the Batutegi cascade system comprising the Batutegi Dam, Way Sekampung Dam, Argoguroh Weir, Margatiga Dam and Jabung Weir. This study assesses the impacts of climate change on rainfall intensity, dependable flow, and water allocation modeling within the Sekampung River Basin. The analysis employed five rainfall datasets downscaled from the NASA Earth Exchange Downscaled Climate Projections at 30 arc-seconds (NEX-DCP30) and simulated using five CMIP6 models for both the historical period (1980–2014) and future projections (2024–2100). Results indicate that CMIP6 projections reproduce rainfall patterns reasonably well during January–February and May–July, but perform less consistently in March–April and October–November. Most models tend to overestimate the mean annual rainfall. Rainfall variability contributes to pronounced fluctuations in river discharge, particularly during the dry season. Dependable flows show marked changes, especially within the exceedance probability range of Q10% to Q100%. Although an overall increasing rainfall trend is observed, the system is still able to satisfy water demand under the 2023 operating rules, with potential deficits persisting during critical periods. Optimization modeling further demonstrates the necessity of adaptive reservoir operation rules under climate change, which could improve the reliability of meeting multisectoral demands to approximately 80%. These findings underscore the importance of incorporating climate model projections into watershed-based water resources management to strengthen resilience against extreme hydroclimatic variability.
Adaptive Hydrodynamic Modeling for Sustainable Irrigation Management in Tidal Swamp Regions Edwar, Raden M.; Karamma, Riswal; Maricar, Farouk; Hatta, Mukhan P.
Civil Engineering Journal Vol. 12 No. 1 (2026): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-01-015

Abstract

The Lalan River functions as the primary water source and plays an important role in supporting irrigation systems and water management in tidal swamp areas. However, water management in this region still faces challenges such as salinity intrusion and unstable water distribution, while conventional approaches applied have not fully considered the hydraulic characteristics and hydrodynamic conditions of the waters. This study aims to analyze the hydrodynamic characteristics of the Lalan River as the main water system in the tidal swamp irrigation area of D.I.R. Karang Agung Hilir, Banyuasin Regency, South Sumatra Province, Indonesia, in order to design an effective water management strategy for agricultural irrigation. The research methods include bathymetry, tidal, current, and salinity measurements. Hydrodynamic modeling was applied to analyze aquatic phenomena, including flow dynamics and salinity distribution patterns in tidal swamp areas. The hydrodynamic model was calibrated and validated using field data with a Root Mean Square Error (RMSE) value of 0.170 m to ensure the reliability of the simulation. The analysis results show that the application of a one-way flow system can significantly reduce salinity, from around 2–5 ppt in the old system to around 1–2 ppt during high tide and below 0.5 ppt during low tide, or a reduction of up to ±60%. This reduction allows river water to be used more effectively for agricultural irrigation. The novelty of this research lies in the adaptive hydrodynamic approach based on seasonal hydrological conditions as a foundation for designing sustainable water management systems in tidal swamp areas according to the hydrotopography of the region.
Co-Authors A Ilda Puspita Ahmad Sumakin Ahmad Syarif Sukri Almunawir, Asrif Andi Subhan Mustari Arsyad Thaha Ashury, Ashury Aslamil Taqwa Bambang Bakri Chairul Paotonan Djunur, Lutfi Hair Edwar, Raden M. Evi Aprianti Farauk Maricar Farouk Maricar Hatta, Mukhan P. Ildha Dwi Puspita Kato, Muh Alvin Achmad Leda, Alexander Lopa, Rita Tahir Maricar, Farouk Muh Arsyad Thaha Muh Saleh Pallu Muhammad Farid Maricar Muhammad Saleh Pallu Mukhsan Hatta Mukhsan Putra Hatta, Mukhsan Putra Mustamin, Muhammad Rifaldi Mustari, Andi Subhan Nenny, Nenny Pallu, Muhammad S. Rita Lopa Rita Tahir Lopa Rita Tahir Lopa S. Kuba, Muhammad Syafa'at Saleh Pallu Silman P Manda Silman Pongmanda Subhan Mustari Sugianto Sugianto Tahir Lopa, Rita Talib, Muhammad Thoha Thaha, Muhammad Arsyad Zulmi, Ahmad Syafi'i