J-Sil (Jurnal Teknik Sipil dan Lingkungan)
J-Sil (Jurnal Teknik Sipil dan Lingkungan) was established in 2016 and is managed by the Department of Civil and Environmental Engineering, IPB University, and the Institute of Engineering Indonesia (PII), Bogor. The journal aims to disseminate original and quality academic papers that have the potential to contribute to the advancement of science and technology in the field of civil and environmental engineering to support sustainable development. The journal covers any scopes within civil and environmental engineering, such as structure, irrigation, drainage, water quality, water construction, hydrology, water management, groundwater conservation, soil mechanics, foundation, soil improvement, slope stability, liquefaction, and soil modeling, road engineering, transportation management, construction management, environmental atmosphere and climate change environment (control of greenhouse gases, air quality models, climate change locally and globally), renewable energy and waste management (recovery of energy from waste, incineration, landfills, and green energy, biotechnology environment (nano-bio sensors, bioenergy, environmental eco-engineering), technology, physical, biological, and chemical (membrane technology, the process of advanced oxidation technology Physico-chemical, biological treatment of water), engineering environmental control (desalination, ICA (instruments, power, and automation), and water reuse technologies) and Applied Geomatics. The journal receives original papers from various contributors, such as academicians, scientists, researchers, practitioners, and students worldwide.
Articles
198 Documents
<![CDATA[Flexural Performance of Glued Laminated Timber Beams Reinforced with Externally Bonded FRP: An Experimental Investigation ]]>
<![CDATA[Dani Nugroho Saputro]]>;
<![CDATA[Eva Ariyanti]]>;
<![CDATA[Nor Intang Setyo Hermanto]]>;
<![CDATA[Hery Awan Susanto]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.225-238
<![CDATA[The use of hard timber in construction is increasing, but it is quite expensive and its production is slow. As an alternative, laminated timber combining hard and soft quality timber has been proposed. This study utilized rambutan timber (hardwood) and sengon timber (softwood). Structural failure may occur when elements can no longer resist the applied loads; thus, reinforcement is required. This study aims to investigate the flexural strength of laminated timber beams and assess the performance enhancement using a fiber-reinforced polymer (FRP) type SCH-11UP. Composite was applied through the Externally Bonded (EB) method. The flexural capacity was evaluated in accordance with ASTM D143 through four-point bending tests and SNI 7973:2013. Four types of test objects were tested with three samples per type: TP (unreinforced), EB1 (type 1), EB2 (type 2), and EB3 (type 3), with TP as the control group. The experimental results showed that EB3 yielded the highest improvement, with up to 87% increase in the maximum load capacity, displacement, modulus of elasticity (MOE), modulus of rupture (MOR), stiffness, and structural efficiency. The improvements followed in descending order: EB2, EB1, and TP.]]>
<![CDATA[Utilization of Biomimetic Design on the Design of an Internet of Things-Based Smart Air Purifier in Urban Residences ]]>
<![CDATA[Rahmawati, Hanifah Indah]]>;
<![CDATA[Meirawan, Danny]]>;
<![CDATA[Rahayu, Sri]]>;
<![CDATA[Fauzan, Mochammad Rizal]]>;
<![CDATA[Azmi, Mutiara Nabila]]>;
<![CDATA[Fauzi, Rafi Zahran]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.239-248
<![CDATA[Poor air quality in urban areas significantly impacts public health, productivity, and quality of life. Various efforts have been made to address this issue, but many solutions still have limitations, such as low effectiveness, designs that lack portability, and the inability for real time monitoring. This research aims to develop a smart air purifier based on biomimetics and the Internet of Things (IoT) as an innovative solution to improve air quality in urban residences. The device prototype mimics the mechanism of leaf stomata, which naturally regulate the flow of air and gases, thus enabling more optimal clean air circulation. The system can monitor environmental parameters, namely temperature, humidity, air pressure, and Indoor Air Quality (IAQ) Index, in real time using BME680 and MQ-135 sensors, and can be controlled via Google Assistant. Testing was conducted in three locations in West Java Province, Indonesia: Cilame, Cibiru, and Jatinangor. Linear regression analysis was used to evaluate the relationship between environmental variables and air quality. The results showed that the device was able to significantly improve air quality in all locations, especially in Cilame, with air pressure being the dominant factor affecting IAQ (coefficient of determination 0.88). Different from previous research, this device offers advantages in the form of high portability, real time monitoring, and IoT integration, making it a potential sustainable solution for improving the air quality of urban residences.]]>
<![CDATA[Tsunami Hazard Level Mapping and Evaluation of Temporary Evacuation Sites (TES) on the Palabuhanratu Coast ]]>
<![CDATA[Rosyadah, Rani]]>;
<![CDATA[Sutoyo]]>;
<![CDATA[Putra, Heriansyah]]>;
<![CDATA[Ramadhanis, Zainab]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.227-286
<![CDATA[Indonesia is highly prone to disasters due to its location at the convergence of three active tectonic plates: the Eurasian, Pacific, and Indo-Australian plates. Sukabumi Regency ranks as the second-highest risk area in the country. In the coastal region, Palabuhanratu Urban Village has the highest population density in Palabuhanratu District, reaching 6,042 people/km². The high population density in coastal areas increases the potential for casualties in the event of a tsunami. Therefore, mitigation efforts in the form of Temporary Evacuation Sites (TES) are essential across the coastal areas of Palabuhanratu District. A reassessment of the existing TES locations is necessary to evaluate their effectiveness. This study aims to identify the affected area and population under tsunami scenarios with run-up heights of 10 m, 15 m, and 20 m. Additionally, it analyzes the coverage of TES locations and the effectiveness of evacuation routes in Palabuhanratu District. The analysis is conducted using ArcGIS and QGIS software through several stages, including tsunami hazard zoning, tsunami inundation modeling, TES coverage analysis, and evacuation route optimization using network analyst tools. The results indicate that 90.6% of the coastal area in Palabuhanratu District falls into the safe category. The tsunami inundation modeling shows an affected area of 3.32 km² (run-up 10 m), 4.9 km² (run-up 15 m), and 6.1 km² (run-up 20 m). The estimated affected population for these run-up heights is 6,123, 9,348, and 12,849 people, respectively. On average, 68% of the affected population can reach a TES. A total of 68 evacuation routes were generated, with 30 routes classified as highly safe, safe, or moderate, requiring 0–20 minutes of travel time. The findings suggest that additional TES locations should be strategically placed along the coastal areas, particularly near residential zones, to improve evacuation efficiency.]]>
<![CDATA[Analysis of Water Pollution Index in The Tributary of Kusan River, South Kalimantan ]]>
<![CDATA[Nurkhaerani, Fatma]]>;
<![CDATA[Adzillah, Wilma Nurrul]]>;
<![CDATA[Sari, Gina Lova]]>;
<![CDATA[Oktariyanto, Eka Nugroho]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.249-258
<![CDATA[Domestic wastewater discharge remains a major factor contributing to the deterioration of river water quality, as untreated effluents are still commonly released directly into river systems. This concern is particularly evident in the downstream segment of the Kusan River tributary, situated in the villages of Sungai Lembu and Beringin. The intensifying expansion of residential settlements in the area has been identified as a key driver of pollution in the Kusan River, with its scale increasing annually. Environmental degradation arises when the pollutant load exceeds the assimilative capacity of the aquatic ecosystem. Under such conditions, the natural recovery process becomes protracted and increasingly ineffective, resulting in persistent contamination. This research is designed to assess the influence of surrounding anthropogenic activities on the water pollution index and the ecological condition of the Kusan River tributary in the aforementioned villages, within Tanah Bumbu Regency, South Kalimantan Province, employing the Water Pollution Index (WPI) methodology. Based on laboratory analyses, Total Suspended Solids (TSS) concentrations in the lower reaches of the tributary exceed 50 mg/L, thus surpassing the threshold set by Government Regulation No. 22 of 2021 concerning Water Quality Management and Pollution Control. Moreover, findings from the pollution index evaluation indicate that water quality in the study area ranges from good to lightly polluted, with index scores varying between 0.33 and 1.73.]]>
<![CDATA[Compressive Strength Performance of Rice Husk Ash-Based Geopolymer Concrete with Fly Ash as a Secondary Material ]]>
<![CDATA[Olii, Muhammad Ramdhan]]>;
<![CDATA[Saliko, Maxidin]]>;
<![CDATA[Doda, Nurhayati]]>;
<![CDATA[Nento, Sartan]]>;
<![CDATA[Olii, Rizky Selly Nazarina]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.259-266
<![CDATA[Concrete production heavily relies on cement, whose manufacturing significantly contributes to carbon emissions, necessitating alternative materials for sustainable construction. This study investigates the effect of varying compositions of rice husk ash (RHA) and fly ash on the compressive strength and workability of concrete. Five variations of RHA and fly ash ratios (80:20, 75:25, 70:30, 65:35, and 60:40) were tested to identify the optimal mixture. The results show that the 60:40 ratio produced the highest compressive strength of 16.66 MPa and a slump value of 9.5 cm, indicating enhanced workability and mechanical performance. This finding highlights the complementary roles of RHA, which contributes to pozzolanic activity, and fly ash, which enhances hydration and cementitious properties. Excessive RHA content, however, leads to reduced strength due to its lower reactivity. The exponential trend observed in the compressive strength characteristics (R² = 0.9081) confirms the nonlinear relationship between material composition and performance. This research aligns with previous studies demonstrating the benefits of using industrial by-products in concrete. The findings underscore the potential of combining RHA and fly ash as an eco-friendly solution for high-strength concrete, promoting waste utilization and sustainability in the construction industry. Future studies should explore long-term durability and scaling for industrial applications.]]>
<![CDATA[Risk Analysis of Time and Cost Factors in the Renovation Project at Vimala Hills Residential Area ]]>
<![CDATA[Vigie Priantika Putra Hutama]]>;
<![CDATA[Erizal]]>;
<![CDATA[Satyanto Krido Saptomo]]>;
<![CDATA[Naufal Rudini]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.385-396
<![CDATA[Construction projects always have uncertainties even in small projects, especially in terms of time and cost. This study aims to identify and analyze the dominant risks in home renovation projects in Vimala Hills Bogor and design mitigation strategies. Data collection was carried out by distributing questionnaires to all project implementers. Data analysis used the severity index method to measure frequency and severity combined with biserial point tests and KR-20 to measure the validity and reliability of 15 risk variables with 30 respondents directly involved in the project. The results showed that there were two dominant risks in the high category, namely bad weather conditions (frequency of 80,00%, impact of 77,50%, and risk value of 16) and change of work (frequency of 56,67%, impact of 64,17%, and risk value of 12). Other risks are in the medium to low category. The mitigation strategies implemented include adjusting work schedules based on weather forecasts, protecting work areas, finalizing the design before construction begins, and implementing formal procedures for work changes. After mitigation, the risk value of the two dominant variables dropped to the low category. These findings confirm the importance of implementing risk management even on small scale projects to prevent delays and cost overruns and increase efficiency so that contractors can achieve optimal project goals in the future.]]>
<![CDATA[Assessment of Reverse Demulsifier Surfactant Performance for Emulsion Separation in Produced Water from Oil and Gas Operations ]]>
<![CDATA[Efrian Pratiwi, Della]]>;
<![CDATA[Chadirin, Yudi]]>;
<![CDATA[Novriansyah, Adi]]>;
<![CDATA[Kurniawan, Allen]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.267-276
<![CDATA[The increasing volume of produced water from oil and gas production requires effective handling before reinjection or disposal. Produced water contains minerals, oil, and other contaminants, making separation processes at refineries insufficient. This study investigates the use of reverse demulsifiers, specifically surfactants (Alkyl Phenol Ethoxylate – APEOs and Natrium Lignosulfonate – NLS), to separate emulsions in produced water. Surfactants reduce surface tension between oil and water, facilitating contaminant removal. Using a jar test apparatus, experiments varied surfactant dosage, stirring speed, and stirring time to determine optimal conditions for achieving water quality standards. Results indicate differences between APEOs and NLS in removing contaminants. APEOs, at 5 ppm, 130 rpm, and 5 minutes, achieved a COD concentration of 80.33 mg/L, while NLS, at 5 ppm, 220 rpm, and 10 minutes, yielded 77.48 mg/L. Both are well below the quality standard of 200 mg/L, proving the effectiveness of this approach. This study highlights the potential of APEOs and NLS as reverse demulsifiers for produced water treatment. Proper application could enable safe reuse or environmentally sound disposal, providing an effective solution to managing produced water in the oil and gas industry.]]>
<![CDATA[Evaluation of the Seismic Performance of The X Building Structure in West Jakarta Using Nonlinear Pushover Static Analysis ]]>
<![CDATA[Faradhilla, Nafisha]]>;
<![CDATA[Erizal]]>;
<![CDATA[Sekar Mentari]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.307-318
<![CDATA[Jakarta, which is close to the earthquake path, has a high potential for seismic hazards, so building structures must be designed to withstand earthquakes. The X Building, located in West Jakarta, is expected to have an earthquake-resistant structure, evaluated using pushover analysis. This study aims to assess the performance of the X Building structure against earthquake loads using pushover analysis with ETAS software. X Building underwent translation in patterns 1 and 2, followed by rotation in pattern 3. The value of the structure period in the X direction is 2.578 seconds, and in the Y direction is 2.252 seconds. The mass participation requirement has been met, with a participation rate of 90% or higher in all three directions. There is torsional irregularity in the Y direction. The dynamic shear force after scaling is 10,503.93 kN (X) and 10,503.94 kN (Y). When the performance point is reached, the roof displacement is 623.182 mm (X) and 513.267 mm (Y). The total number of plastic hinges is 2774 in the X direction and 2330 in the Y direction. The structural performance level obtained is Damage Control (DC). The ductility value in the X direction is 1.31, and in the Y direction is 1.12.]]>
<![CDATA[Analysis of Landslide Vulnerability and Its Impact on Population and Infrastructure Exposure in Central Bogor District Using AHP and Open Geospatial Data ]]>
<![CDATA[Vincent, Vincent]]>;
<![CDATA[Ramadhanis, Zainab]]>;
<![CDATA[Sutoyo, Sutoyo]]>;
<![CDATA[Suharnoto, Yuli]]>;
<![CDATA[Sudibyo, Tri]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.287-296
<![CDATA[Indonesia’s location at the convergence of three active tectonic plates makes it highly susceptible to various natural disasters, with landslides being among the most frequent and destructive, particularly in mountainous and densely populated urban areas. Central Bogor District in West Java represents a vulnerable area where steep topography, high rainfall intensity, and dense population heighten landslide risk. Despite recurrent landslide events, comprehensive vulnerability assessments integrating both physical and socio-environmental factors remain limited. This study aims to produce a spatially explicit landslide vulnerability map for Central Bogor District by utilizing open geospatial data and applying a GIS-based multi-criteria decision-making approach. The Analytical Hierarchy Process (AHP) was employed to assign weights to four primary physical parameters—rainfall, slope, lithology, and land cover—based on their relative contribution to landslide susceptibility. Supporting data were derived from Sentinel-1A imagery (InSAR), Landsat-8 classification, CHIRPS precipitation records, and official geological maps. These physical layers were then integrated with exposure indicators, including population density, infrastructure distribution, and accessibility data from OpenStreetMap. The results delineated three landslide vulnerability zones: high (49.87 ha), moderate (481.82 ha), and low (236.45 ha). High-risk zones, such as Gudang and Paledang Sub-districts, feature steep slopes, weak geological formations, and dense settlements. Overlay analysis also revealed a significant concentration of critical infrastructure within moderate-to-high vulnerability zones, highlighting exposure and potential service disruption during hazard events. The study underscores the critical value of combining open geospatial data with AHP-based weighting to inform targeted disaster mitigation, infrastructure planning, and resilient urban development. The resulting maps can guide policy and preparedness strategies to reduce landslide impacts in high-risk urban areas.]]>
<![CDATA[Crop Coefficients of Paddy and Evapotranspiration in the Minapadi Model System Applying Nonpowered Automatic Fertigation ]]>
<![CDATA[Tri Julianto, Baskoro]]>;
<![CDATA[Setiawan, Budi Indra]]>;
<![CDATA[Saptomo, Satyanto Krido]]>;
<![CDATA[Liyantono]]>;
<![CDATA[Kurniawati, Euis Kania]]>
<![CDATA[ Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025 ]]>
Publisher : <![CDATA[Departemen Teknik Sipil dan Lingkungan IPB ]]>
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DOI: 10.29244/jsil.10.2.319-326
<![CDATA[In irrigation and agricultural planning, the crop coefficient value plays an important role in calculating water planning on land. This study aims to calculate the crop coefficient (Kc) of rice in a Nonpowered Automatic Fertigation (FONi) irrigation system combined with a minapadi system as a reference for irrigation planning. This study was conducted experimentally for 99 days in Dramaga, Bogor, using the FONi Minapadi system consisting of a fiberglass tank, a water supply tank, and an automatic float to maintain the water level. Actual evapotranspiration (ETa) data were calculated based on water balance, while potential evapotranspiration (ETo) was modeled using five methods: Penman-Monteith, Turc, Hargreaves, Makkink, and Blaney-Criddle. Model validation was performed using linear regression against the Penman-Monteith method as the standard reference. The results show that the total ETa during the observation period was 421.93 mm. Among the ETo calculation methods, the Turc model provided results closest to the Penman-Monteith method, with a coefficient of determination (R²) of 0.741 and the lowest sum of squares error (SSE) of 56.026. The calculated Kc values varied throughout the rice growth phase, with the highest value of 1.84 observed during the reproductive phase. The relatively high Kc value reflects significant water demand in the FONi Minapadi system, influenced by system characteristics and environmental conditions. This study concludes that the FONi Minapadi system has the potential to improve irrigation management efficiency in integrated agriculture. However, further research is needed to understand the influence of technical and environmental factors on the Kc value and to compare it with other irrigation systems.]]>
