Media Ilmiah Teknik Sipil

Evaluasi Metode Instalasi Sensor Kapasitif Berbiaya Rendah untuk Pemantauan Kadar Air Tanah pada Lereng Berbasis IoT

2026-04-21T03:18:36+00:00

This study evaluates the effect of installation methods of low-cost capacitive soil moisture sensors on field measurement performance. Six sensors were tested using two installation methods, namely side mount and bottom mount, at three depth variations (0.2 m, 0.5 m, and 1 m). A monitoring system was developed using an ESP32 microcontroller integrated with the Firebase cloud platform for real-time data acquisition, powered by a solar panel. Field testing was conducted from March 10 to April 16, 2026, with GPM satellite rainfall data used as a supporting parameter. Calibration results showed a strong linear relationship between sensor output voltage and volumetric water content with R²>0.9 for all sensors. The bottom mount method produced valid readings from the beginning of the testing period with good response to rainfall events at all depths. In contrast, the side mount method experienced a delay in sensor–soil contact formation, resulting in invalid data during the early phase. The findings indicate that the quality of physical contact between the sensor and soil is a key factor in reading reliability, and the bottom mount method is more effective for long-term field soil moisture monitoring.

Proyeksi Hidrograf Banjir Berdasarkan Data Curah Hujan Dan Tutupan Lahan DAS Dayeuhkolot

2026-05-01T02:11:00+00:00

Flooding is a frequent hydrometeorological disaster in the Dayeuhkolot Watershed, a sub-watershed of the Citarum River Basin, caused by high rainfall intensity and land cover changes. This study aims to project flood hydrographs in the Dayeuhkolot Watershed based on satellite rainfall data and land cover changes up to the year 2100. Rainfall data were obtained from GSMaP for the period 2018–2022 and calibrated using the quantile mapping method to match observed rainfall characteristics, while river discharge data were collected from the AWLR monitoring station operated by PJT II. Land cover analysis was conducted using Sentinel-2 imagery for the period 2017–2021 and projected to the year 2100 using the Malaccha method. Rainfall–runoff modeling was performed using the HEC-HMS software with the Soil Conservation Service (SCS) Synthetic Unit Hydrograph method. Model performance was evaluated using Nash–Sutcliffe Efficiency (NSE) and Root Mean Square Error (RMSE). The results show that out of 12 flood events analyzed, six models met the performance criteria with NSE values greater than 0.36. Land cover projections to 2100 indicate minor changes in forest areas, leading to an increase in the Curve Number value from 76.90 to 77.00, which resulted in a 0.33% increase in peak flood discharge from 2021 to 2100. These findings demonstrate that land cover changes influence flood hydrograph characteristics and can serve as a basis for flood mitigation planning in the Dayeuhkolot Watershed.

Evaluasi Numerik Kekuatan Dan Kemampuan Layan Jembatan Girder Komposit Baja Menggunakan Welded Beam SM490

2026-02-13T02:52:36+00:00

Composite Girder Bridge is a bridge construction consisting of profile steel material with reinforced concrete. The intact steel section profile used in the composite girder bridge is not produced by the manufacturer in Indonesia, so it uses a built-up section profile from high-strength plate grade SM490. Numerical Evaluation of the strength and serviceability of the bridge uses a nonlinear analysis method based on FEA software. Finite Element Analysis using ANSYS R2025 identifies the main structural components of steel in the form of SHELL181 and the concrete structure as SOLID65. Shell Model is used to represent the steel girder because the analysis results are close to the experimental test results of 91.20%. The results of ANSYS verification with node loading in the middle of the span using WB1350x12x20x20 obtained a performance of 74.44% against f_u = 490 MPa, and reinforced concrete 44.207% against f'_c = 30 MPa. Examination of the composite girder diaphragm system for serviceability with a distance between girders of 1.6 m obtained a performance of 2.960% below the standard load of 500 kN. After reinforcement with the addition of a cover plate and modification of the diaphragm, the steel deflection capacity was reduced to 58.39% while the concrete increased to 50.967%.

Pengaruh Perubahan Tata Guna Lahan Terhadap Limpasan Permukaan Dan Erosi Lahan Daerah Aliran Sungai (DAS) Bendungan Temef Dengan Soil And Water Assessment Tool (SWAT+)

2026-04-22T03:50:18+00:00

Land-use change is one of the primary drivers influencing watershed hydrological conditions. Uncontrolled conversion of land in the Benanain watershed, particularly in the Temef sub-watershed, has the potential to increase surface runoff and accelerate soil erosion, which in turn increases sedimentation within the Temef Dam reservoir. This study aims to analyze the impact of land-use changes between 2018 and 2024 on surface runoff and soil erosion using the Soil and Water Assessment Tool Plus (SWAT+). Data used include rainfall, climate, DEM, soil type maps, and land cover maps which were processed through watershed delineation, HRU formation, and hydrological simulations. The results indicate significant land-cover changes, particularly a reduction of shrubland by 27.65% and an increase in forest area by 23.74%. These changes significantly affect runoff patterns, where in 2024 sub-watershed 6 produced the highest annual runoff of 611.96 mm and sub-watershed 8 the lowest at 209.93 mm. The findings provide a comprehensive understanding of hydrological dynamics in the Temef watershed and serve as a scientific reference for soil-water conservation planning and sustainable watershed management.

Analisis Kinerja Ruas Jalan Kepanjen–Kendalpayak Kabupaten Malang Berdasarkan PKJI 2023 Dengan Pendekatan Segmentasi

2026-03-30T15:54:12+00:00

The Kepanjen–Kendalpayak road segment is a strategic collector road in Malang Regency, connecting residential areas with local and regional economic centers. Growing traffic flow without a comprehensive capacity evaluation poses a risk of significant service degradation. This study examines the operational performance of this road segment through capacity analysis, degree of saturation (DS), and level of service (LoS) using the Indonesian Highway Capacity Manual (PKJI 2023) for inter-urban roads. Field traffic surveys were conducted over two days across eleven segments spanning ±11.78 km, covering traffic volumes, road geometric data, and roadside friction classes. Results indicate that the peak hour occurs between 16:30–17:30 with a flow of 2208.8 pcu/hour, dominated by motorcycles. Segment capacities range from 2958.00 to 3340.80 pcu/hour, primarily influenced by lane width variation. The degree of saturation varies from 0.66 to 0.75, with three segments (STA 5+000, 8+000, and 9+000) exhibiting LoS D conditions. These findings demonstrate the necessity of a segment-based analytical approach for identifying critical performance points, providing a basis for targeted road management interventions.

Analisis Kerentanan Banjir Terhadap Infrastruktur Jalan Tol (Studi Kasus Ruas Jalan Tol Tangerang-Merak KM 50)

2026-05-29T06:20:47+00:00

Flooding on the Tangerang-Merak Toll Road at KM 50+000–51+000, Cikande, in January 2026 disrupted the national logistics corridor. This study evaluates the macro-level causes of inundation through integrated hydrological analysis using a Geographic Information System (GIS) approach with scoring, overlay, and hydrological modeling techniques across 14,516 spatial units in the Cidurian Watershed. The evaluation covers spatial drainage capacity, Digital Elevation Model (DEM), flow accumulation, SWAT+ modeling, and its alignment with the Cikande Industrial Area Detailed Spatial Plan (RDTR). Analysis indicates that 96.2% of the study area has low drainage capacity, an average Curve Number of 94.2, and a surface runoff ratio of 0.83. The flooding mechanism is identified as compound flooding involving three simultaneous processes: local channel tailwater submergence driven by high Cidurian River levels, backwater accumulation in upstream toll road depressions, and overtopping across the road body. DEM analysis confirms Bakung Village as the flow pathway and Songgom Jaya Village as the final accumulation zone. The findings confirm that the flood stems from the interaction of main river overflow, loss of hydraulic gradient, and watershed capacity limits rather than local drainage constraints alone. Three technical mitigation scenarios are recommended: elevating the road, river normalization with embankments, and expanding cross-drain capacity integrated with collector drains and downstream normalization.

Monitoring Vertikalitas dan Perubahan Elevasi Gedung di Kota Kupang Menggunakan Metode Leveling Presisi sebagai Upaya Mitigasi Risiko Gempa Bumi

2026-04-07T03:59:49+00:00

This study aims to analyze the results of levelling observations conducted on eleven buildings with various functions, including educational facilities, social and cultural buildings, health facilities, and commercial structures. The observations were carried out to assess levelling values against elevation standards and the vertical condition of the buildings as indicators of structural stability. Based on the analysis, the measurement compliance rate ranged from 73.27% to 100%, with an average of 91.22% and a standard deviation of 9.77%, indicating that the measurement quality is generally good. Most educational buildings recorded levelling values above 90%, while several other buildings showed deviations at specific observation points.

The evaluation of physical conditions shows that 63.64% of the buildings are in an upright condition, whereas 36.36% exhibit slight tilting. Although the detected tilt levels are still considered safe, these conditions require periodic monitoring to ensure that no progressive structural settlement occurs. Overall, the study indicates that the structural stability of the buildings within the observation area is relatively good; however, buildings with lower levelling values and slight tilting are recommended for follow-up observations. This research highlights the importance of regular elevation monitoring as part of a Structural Health Monitoring (SHM) system to ensure the safety and service life of buildings.

Justifikasi Ilmiah Dalam Pembangunan Kawasan Permukiman Sebagai Refleksi Filsafat Ilmu Atas Model, Rasionalitas, Dan Realitas Sosial Pada Pembangunan Kawasan Kahayan Riverside

2026-01-12T03:09:43+00:00

The development of residential areas represents a form of applied scientific practice that extends beyond technical implementation to include claims of rationality and scientific justification. In practice, development decisions are commonly grounded in the use of models, standards, and regulations that are treated as objective representations of reality and legitimate bases for intervention. However, such applications of scientific knowledge often encounter complex and dynamic social realities, raising questions about the limits of scientific objectivity and rationality. This article aims to reflect on the role of scientific justification in residential area development from the perspective of philosophy of science. The study employs a qualitative approach using conceptual and reflective analysis of philosophical literature, development standards and policies, and the case study of the Kahayan Riverside area. The findings indicate that scientific models and standards function not only as technical analytical tools but also as mechanisms of epistemic legitimacy that justify development practices. Contemporary philosophy of science reveals that models are perspectival, rationality is contextual, and social reality is integral to scientific practice. Therefore, residential area development should be understood as a socially embedded practice that requires critical reflection on its scientific justifications.

Optimalisasi Pengelolaan Data PSU Dan Kawasan Kumuh Melalui Sistem Basis Data Terintegrasi di Provinsi Kalimantan Tengah

2025-12-21T06:11:44+00:00

The provision of Infrastructure, Facilities, and Public Utilities (PSU) is a fundamental component in the development of housing and habitable residential areas. However, the implementation of PSU development programs in Central Kalimantan Province faces challenges in transparency, limited access to accurate information, and partial data management systems that hinder comprehensive monitoring and evaluation processes. This research aims to describe the design, development, and implementationprocess of the Geo PSU System application as an integrated database capable of inventorying and analyzing PSU and slum area data comprehensively. The research method uses a qualitative approach with a case study on the Geo PSU System developed using the System Development Life Cycle (SDLC) model. The research results show that the Geo PSU System application successfully integrates tabular databases with interactive spatial visualization, equipped with role-based access control security features, and provides a user-friendly modern dashboard. Statistical data shows a high level of accessibility with 2,328 total visits, reflecting transparency of information to the public. It can be concluded that the implementation of the Geo PSU System is effective in accelerating data provision, improving analysis accuracy, and realizing transparent, accountable, efficient, and sustainable residential area management in Central Kalimantan Province.

Analisis Perancangan Tebal Perkerasan Lentur Pada Ruas Jalan Luar Lingkar Selatan Kabupaten Kotawaringin Timur

2026-04-02T03:54:27+00:00

Roads, as one of the means of land transportation, are used by road users as connecting routes from one place to another and also play a very important role in boosting economic activities in a location. Therefore, it is very necessary to increase the capacity of road sections in order to meet transportation needs, enabling access to smaller areas and improving the quality of life of the community. During surveys conducted at certain points, these roads were found to be in very concerning conditions. The road damage includes potholes, which can disturb the safety and comfort of the road users. In the planning, this road pavement will be handled for a length of 2 km. In this study, the author conducted calculations using the Component Analysis Method to determine the thickness of flexible pavement. The results of the research and data analysis using the Component Analysis Method revealed a flexible pavement thickness consisting of a 13 cm surface layer, 20 cm Class A LPA, and 15 cm Class B LPA.

Studi Kelayakan Ekonomi Penggunaan Briket Gambut di Pedesaan Kalimantan Tengah

2026-05-05T12:45:15+00:00

This study aims to analyze the economic feasibility of utilizing peat-based briquettes as an alternative household energy source in rural Central Kalimantan. The research adopts a comparative literature review approach, examining previous studies on peat briquettes, rice husk briquettes, and bagasse briquettes. The analysis focuses on technical parameters (calorific value, moisture content, ash content, burning duration) and economic parameters (production cost, selling price, profit margin, and investment feasibility indicators). The findings indicate that peat briquettes have higher calorific values (5,800–6,200 kcal/g) and longer burning duration (±240 minutes) compared to other biomass fuels. Economically, peat briquettes demonstrate lower production costs (±Rp 3,500/kg), higher profit margins, and positive feasibility indicators, including a positive NPV, BCR of 1.8, and a payback period of approximately two years. Therefore, peat briquettes are economically feasible to be developed as a community-based alternative energy in rural Central Kalimantan, although environmental sustainability must be considered through biomass diversification and regulated peat utilization.