Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja)

PEMODELAN HUJAN-DEBIT MENGGUNAKAN STROM WATER MANAGEMENT MODEL UNTUK EVALUASI SISTEM DRAINASE STUDI KASUS : RW 08 KELURAHAN WONOREJO SURABAYA

Nurul Jannah Asid — 2026-04-30

Rapid land-use changes driven by residential development have significantly disrupted the drainage system in RW 08, Wonorejo Village, Rungkut District, Surabaya, resulting in frequent flooding. This study employs the Storm Water Management Model (SWMM) to evaluate and model the local drainage network. Design rainfall intensities were computed and used as model inputs. The SWMM model comprises 117 subcatchments, 227 junction nodes, 4 outfalls, and 385 conduits. Simulation results yielded a continuity error of –0.25% and a flow-routing error of 0.00%, both well within the acceptable threshold of < 5%. During a two‑hour high-intensity rainfall event, 68 conduits experienced overflow. These findings identify specific vulnerable sections within the network that are prone to flooding under heavy rainfall. Future work should prioritize hydraulic upgrades—such as upsizing conduits or introducing retention facilities—to enhance the system’s resilience and reduce flood risk in similar urban residential settings.

EVALUASI NILAI DAYA DUKUNG TANAH LEMPUNG LUNAK AKIBAT PENGARUH PENAMBAHAN PASIR PANTAI

Saskia Malikha Putri — 2026-04-30

Land is categorized as suitable for use as embankment and subgrade based on the California Bearing Ratio (CBR) value. According to the Indonesian National Standard (SNI), the soil bearing capacity value requirement is categorized as good if the CBR value based on field testing is ≥3% and based on the laboratory the value is ≥6%. However, not all soil categories meet these requirements, for example soft clay soil. Soft soil layers have characteristics such as tending to be very compressible, low shear resistance, low permeability, and low bearing capacity. Efforts to increase the bearing capacity of the soil so that it can be used for construction are carried out by soil stabilization. This study aims to determine the increase in the bearing capacity value of soft clay soil with a mixture of beach sand with variations of 10.5%, 15%, and 20% and to determine the optimum content of beach sand that can increase the CBR value. The results of the study showed that the higher the percentage of beach sand, the higher the CBR value, the optimum content of beach sand is with the addition of 20% with a CBR value of 24.80% and is included in the category of very good material for base or subbase.

ANALISIS PROBABILITAS KETEPATAN BIAYA DAN WAKTU MENGGUNAKAN KONSEP NILAI HASIL DAN MONTE CARLO

Putri Ayu Mentari — 2026-04-30

The SIBS Women's Dormitory Building Construction Project faced significant delays and design alterations, causing changes in project costs and timelines. This study aims to identify delay factors, evaluate cost and time performance using the Earned Value Method (EVM), and estimate the probability accuracy of cost and duration using Monte Carlo simulation. Data were collected through direct observations, stakeholder interviews, and document analysis. Main factors causing delays include adverse weather, challenging site accessibility, delayed material deliveries, and a design change from three to four floors. Initial completion estimates of 623 days showed an accuracy probability of 2.03%, while the revised EVM estimate of 652 days significantly improved accuracy to 73.91%. The probability accuracy for remaining costs of Rp1.948.950.796 using EVM was 19.61%. The findings suggest combining EVM with Monte Carlo simulation effectively enhances predictions and management of construction project costs and durations.

MANAJEMEN LALU LINTAS DI RUAS JALAN TEUKU UMAR BARAT DENPASAR BALI

Alexander Y. Koli — 2026-04-30

Traffic congestion on Teuku Umar Barat Road is attributable to the road's location in the center of Denpasar, where there are very dense concentrations of shops. The purpose of this study is to analyze the performance of the Teuku Umar Barat road section in West Denpasar and to develop alternative solutions to address traffic congestion on the road. The method for calculating road section performance follows the Indonesian Road Capacity Guidelines 2023 to determine free-flow speed, capacity, and performance. The results of the analysis of the performance of the Teuku Umar Barat road section, with a 2/2 TT type of road, experienced performance problems with a degree of saturation value of 1.04, exceeding the road section performance eligibility requirements, which is ≤ 0.85, with the speed of passenger cars used being 26 Km/hour and the travel time used being 0.019 hours. After the implementation of traffic management, namely the implementation of the odd/even road system on the Teuku Umar Barat road from North to South and South to North, starting from the Marlboro intersection to the Gunung Salak intersection, the performance of the Teuku Umar Barat road improved with a decrease in the degree of saturation value to 0.48 and the speed of passenger cars used being 48 Km/hour. The travel time used with a segment length of 500 meters is 0.010 hours. The results of this study are expected to serve as a technical reference for local governments in the planning and management of traffic on urban road sections experiencing high levels of saturation.

MANAJEMEN DAN REKAYASA LALU LINTAS DI RUAS JALAN ERLANGGA TIMUR, KOTA SEMARANG, JAWA TENGAH

Farhan Sholahudin — 2026-04-30

In the role of transportation, there are two main elements that need to be considered: road volume and capacity. When the number of vehicles continues to increase without a corresponding improvement in road capacity, traffic problems such as congestion, accidents, and decreased efficiency of road segments become inevitable. This study aims to evaluate traffic management and engineering on Jalan Erlangga Timur, with a focus on identifying problems and developing effective and sustainable solutions. The methodology includes traffic volume surveys, road infrastructure inventory, vehicle speed measurements, and analysis of the road’s Level of Service. The analysis was carried out based on the Indonesian Road Capacity Guidelines (PKJI) 2023. In addition, this research also considers traffic condition forecasting for the next two years to maintain or improve the performance of the road segment. Findings indicate that Jalan Erlangga Timur experiences significant congestion during peak hours, with a Level of Service categorized as F, indicating highly unstable and disrupted operational conditions. The proposed recommendations include increasing road capacity, priority management, and demand management to improve road performance. The primary contribution of this research lies in providing a technical database and strategic recommendations for the Semarang City Government to optimize traffic management. This study goes beyond documenting existing conditions by offering sustainable solutions to transform underperforming road segments into more efficient and safer transportation corridors

ANALISIS RISIKO KECELAKAAN KERJA DENGAN METODE JOB SAFETY ANALYSIS PADA PROYEK PEMBANGUNAN HOTEL LASKA CIATER RESORT

Risye Nur Sabrina — 2026-04-30

Occupational Health and Safety (OHS) is an important thing in the world of work because workers are guaranteed occupational safety and health both physically and psychologically. However, the implementation of OHS in several companies, especially in construction projects, is still lacking in attention, which can lead to the risk of work accidents. Work accidents in a construction project can be minimized if you know and understand the risk of accidents in the work environment. This study aims to analyze the risk of work accidents in the Laska Ciater Resort Hotel construction project. The data analysis technique uses a descriptive qualitative method using the Job Safety Analysis (JSA) method to identify hazards and risks of work accidents. The results of the study showed that there were four occupational risk assessments, namely low risk, medium risk, high risk, and very high risk. The low risk level was found in 10 jobs with a total of 26 potential hazards. The medium risk level was found in 10 jobs with a total of 31 potential hazards. The high risk level was found in 6 jobs with a total of 6 potential hazards and the very high risk level was found in 1 jobs with a total of 1 potential hazards. Risk control can be categorized into 3 aspects, namely the worker aspect, the work environment aspect, and the work tool aspect.

EFEKTIVITAS PENGGUNAAN LIMBAH SERBUK MARMER SEBAGAI SUBSTITUSI AGREGAT HALUS PADA PERKERASAN KAKU

Chandra Wangi Tanggung — 2026-04-30

The rapid development of infrastructure has led to an increase in demand for infrastructure materials. The use of natural materials in concrete production is becoming increasingly uncontrolled with the continuation of current infrastructure development. With the increase in marble production in Indonesia, the marble powder waste produced has become an environmental problem that needs to be addressed. This study aims to determine the compressive strength of concrete with the addition of 0%, 15%, 25%, and 35% marble powder waste. The research design used in this study is quantitative with a experimental research type. Data analysis uses the ACI (American Concrete Institute) standard. The test specimens in this study were made using cylinders with a diameter of 15 x 30 cm with a planned concrete compressive strength of ƒʾϲ 21.7 MPa. The percentage of marble powder waste used varied between 0%, 15%, 25%, and 35% with a planned age of 7 and 28 days. The results showed that the addition of marble powder waste affected the compressive strength of the concrete, with an optimal value of 23.79 MPa achieved at 28 days with a variation of 15%.

EVALUASI KAPASITAS DRAINASE PERKOTAAN DI JALAN GOTONG ROYONG: STRATEGI ADAPTASI TERHADAP RISIKO BANJIR AKIBAT URBANISASI

Nur Azizah Affandy — 2026-05-02

Urban drainage systems play a crucial role in managing stormwater runoff to prevent flooding, particularly in highly urbanized areas like Gotong Royong Street. Urbanization and land-use changes have increased the risk of surface runoff, while existing drainage channels often fail to accommodate rising flood discharges. This study aims to evaluate the capacity of existing drainage channels against the design flood discharge using hydrological and hydraulic analyses. The methods include calculating the design flood discharge using the rational formula and performing hydraulic analysis with Manning’s equation to assess channel capacity. The results indicate that the drainage channels at points 1 and 2 are insufficient to handle the design flood discharge for 2-year and 5-year return periods, while channels at points 3 and 4 meet the capacity requirements only for the 2-year return period. This capacity mismatch highlights the need for channel upgrades to mitigate potential flooding. Recommendations for future research include developing GIS-based simulation models to comprehensively identify flood-prone areas and assessing the impact of land-use changes on drainage systems. This study contributes to the planning of more adaptive drainage infrastructure in response to dynamic hydrological conditions.

The PREDIKSI KONDISI KERUSAKAN JALAN BERDASARKAN NILAI IRI MENGGUNAKAN APLIKASI ROADROID (Studi Kasus: Ruas Jalan Kelas III dengan Volume Lalu Lintas Rendah di Kabupaten Lumajang)

Tatang Maulana Maliq — 2026-05-02

This study aims to predict road damage conditions based on the International Roughness Index (IRI) value using the Roadroid application on class III roads with low traffic volume in Lumajang Regency. This study is important because the road section has not undergone maintenance since 2018, thus potentially experiencing accelerated degradation of pavement performance. IRI data for 2023 was obtained through a field survey using the Android-based Roadroid application and compared with IRI data for 2018 measured using the National Association of Australian State Road Authorities (NAASRA) tool to determine the rate of increase in damage and predict conditions for the next five years. The results showed that the average IRI value in 2023 was in the severely damaged category with a value between 12.5–20.5 m/km. The relationship model between IRI and Average Daily Traffic (ADR) of heavy vehicles produced the equation y = 0.2889x + 1.2993 (R² = 0.935), which indicates a significant effect of heavy vehicle volume on increasing road surface roughness. Predictive simulations indicate that several road segments are expected to reach a state of minor damage within the next 2–4 years, even with overlays. The novelty of this research lies in the integration of historical and survey data with the Roadroid application for predictive modeling of road damage on low-traffic sections as a basis for preventive maintenance planning.

ANALISIS PERAMALAN TINGGI GELOMBANG LAUT MENGGUNAKAN METODE SPM SERTA VALIDASI MODEL DI PANTAI PANGALI-ALI, KABUPATEN MAJENE, SULAWESI BARAT

Imam Rohani — 2026-05-02

Ocean waves are one of the important aspects of oceanography in planning coastal structures, determining port layouts, shipping routes, and managing the marine environment. There are many factors that influence ocean waves, one of which is wind speed and direction. Waves can generate energy to shape the beach, create currents, and cause forces that act on coastal structures. Therefore, wave data is needed as a parameter in planning coastal structures. This study aims to determine the wave height and wave period at Pangali-ali Beach, Majene, based on a wind speed distribution model and to compare the wave forecasting results using the SPM (Shore Protection Manual) method with Altimetry Satellite data. The results of this study indicate that the dominant wind direction based on wind data over 10 years (2014-2023) is from the Southeast with an occurrence frequency of 27.2%. The wave height forecast using the SPM method occurred in 2014, measuring 2.63 m with a wave period of 7.25 s.

EVALUASI KINERJA SIMPANG BERSINYAL DENGAN PENDEKATAN PKJI 2023 DAN PTV VISSIM (Studi Kasus: Simpang Wisnu Murti Kabupaten Tabanan)

I Made Kariyana — 2026-05-02

The Wisnu Murti Intersection in Tabanan Regency is a four-legged signalized intersection with three phases and a central roundabout. It serves as a primary connector between the Denpasar–Gilimanuk National Road and Ngurah Rai–MH Thamrin Road. Congestion and delays, particularly during peak hours, highlight the need to evaluate its performance and traffic signal control system. This study aims to assess the existing performance of the intersection using the Indonesian Highway Capacity Manual (PKJI 2023) and PTV Vissim microsimulation, employing indicators such as queue length, delay, and Level of Service (LOS). The analysis revealed poor performance, with a degree of saturation (Dj) of 1.37 and an average delay of 120.9 seconds/pcu (LOS F). Vissim simulation results showed the longest queue occurred on the east approach, reaching 436.34 meters with an average delay of 85.17 seconds/pcu. A recommended signal control scenario applying the early cut phase with a 113-second cycle significantly improved performance, reducing queue length by 69.9% and average delay by 60.6%. Adaptive green time distribution across phases provided better efficiency compared to the scenario without early cut. Therefore, the application of the early cut strategy is considered flexible, responsive to fluctuating traffic flow, and feasible for implementation at the Wisnu Murti Intersection.

ANALISIS KEBUTUHAN AIR BERSIH DOMESTIK DESA MARENGAN LAOK KECAMATAN KALIANGET KABUPATEN SUMENEP

Ach. Desmantri Rahmanto — 2026-05-02

Marengan Laok Village is one of the villages in Sumenep Regency which is included in the category of densely populated settlements and coastal areas surrounded by salt fields and the Madura Strait. Divided into 4 hamlets, namely Karang Komis Hamlet, Beddi Hamlet, Jenengan Hamlet, and Masjid Hamlet) with the main source of drinking water and clean water needs of the community relying on the services of the Sumenep Regency Regional Drinking Water Company (PDAM). The purpose of this study is to determine the domestic clean water needs of the Marengan Laok Village community for the next 5, 10, 15, 20 and 25 years. The data analysis technique used in this study is the projection of the number of customers up to 25 years and the projection of the amount of water needs up to 25 years. The need for domestic clean water in Marengan Laok Village for the next 5 years is 0.54167 l/second, for the next 10 years it is 0.65856 l/second, for the next 15 years it is 0.77662 l/second, for the next 20 years it is 0.89352 l/second, and for the next 25 years it is 1.01042 l/second. The estimated need for domestic clean water discharge production for the next 5 years is 7,719 l/day, for the next 10 years it is 9,335 l/day, for the next 15 years it is 10,955 l/day, for the next 20 years it is 12,571 l/day, and for the next 25 years it is 14,190 l/day.

PEMANFAATAN LIMBAH KOTORAN HEWAN PADA CAMPURAN BETON DI TINJAU DARI KUAT TEKAN

Subaidillah Fansuri — 2026-05-02

Indonesia has a lot of animal waste; this animal waste causes air pollution and becomes a center for the spread of disease. Because cow dung has a silica content of 9.6% per kilogram, silica is the main ingredient in cement, so the study uses cow dung as an additional ingredient in making concrete which will be reviewed from the compressive strength with the proportion of cow dung additives of 0%, 5%, 10% and 15%. This study conducted a normal concrete experiment with a concrete quality of 20 Mpa which was given additional cow dung waste with variations of 0%, 5%, 10% and 15%. Using a cube-shaped test object measuring 15 x 15 x15 at the age of 5 days and will be tested using test objects, testing test objects such as slump testing, and compressive strength to obtain the quality of concrete from the research sample. This study was conducted to produce quality and economical concrete while preventing pollution caused by animal waste by utilizing the waste as an additional ingredient in concrete making. This study used cow dung ash as an additional material of 0%, 5%, 10%, and 15%. The results of this study obtained an average compressive strength of 14.592 MPa for the 0% variation, 14.370 MPa for the 5% variation, 10.22 MPa for the 10% variation, and 9.407 MPa for the 15% variation.

PENGARUH PENAMBAHAN LIMBAH NILON TERHADAP KUAT TEKAN DAN TARIK BELAH BETON UNTUK PEMBUATAN FIBER BETON

Tarsisius Sarman — 2026-05-02

Concrete excels due to its high compressive strength, durability, and resistance to fire, water, and environmental factors. However, concrete has weaknesses in terms of low tensile strength and brittleness. The addition of fibers, such as nylon fibers, to the concrete mixture aims to overcome these weaknesses by providing randomly distributed reinforcement. This study examined the effect of adding nylon fibers at varying concentrations of 0% (normal), 2%, 4%, and 6% on the mechanical properties of concrete. The tests conducted included compressive strength (at 7, 14, and 28 days), as well as splitting tensile strength and porosity (at 28 days). The results of the 28-day testing showed that: Compressive Strength: The addition of nylon fibers effectively increased the compressive strength. The maximum value was obtained at a variation of 6% at 21.51 MPa, an increase of 11.8% compared to normal concrete (19.24 MPa). Split Tensile Strength: The addition of nylon fibers generally resulted in slightly lower values. The highest value for nylon variation was obtained at 6% at 2.55 MPa (a decrease of 1.9% from the normal 2.59 MPa). The 2% variation experienced the largest decrease, namely 2.22 MPa (a decrease of 15.1%)