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All Journal Jurnal Mahasiswa Jurusan Teknik Sipil Rekayasa Sipil Civil and Environmental Science Journal (CIVENSE) at-tamkin: Jurnal Pengabdian kepada Masyarakat Astonjadro ARIKA International Journal Of Science, Technology & Management (IJSTM) Asean Journal of Science and Engineering (AJSE) Journal of Novel Engineering Science and Technology
Indradi Wijatmiko
Jurusan Teknik Sipil Fakultas Teknik Universitas Brawijaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Assessment of Building Reliability in the Gedung Kuliah Bersama (GKB) of State Polytechnic Fakfak West Papua Saisbuwono Bauw, Umas; Wibowo, Ari; Wijatmiko, Indradi
ASTONJADRO Vol. 11 No. 3 (2022): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v11i3.7144

Abstract

The engineer must pay attention to strength, comfort, frugality, and impact on the environment in the building planning both in multi-storey or non-storey. Those aspects must be carefully planned and taken into a capable management system in it and to comply the comfort aspect in the building, hence disaster risk management such as fire prevention is needed. The purpose of this research is to evaluate the fire prevention and control system based on Minister of Public Works Regulation No.26/PRT/M/2008 and Indonesian National Standart 03-6574-2001, analyze the building reliability, and provide alternative solutions for the fire disaster control system in the college building of Fakfak State Polytechnic. The result of check list observation showed the average suitability was . The calculation result of Value of the Building Safety System Components using the Pd-T-11-2005-c guideline based on Analytical Hierarchy Process (AHP) was 64.23 % < 80%.  It  was classified into GOOD ENOUGH. From the results, alternative solution that can be proposed for college building at Fakfak State Polytechnic is to establish fire prevention.
Analysis of the Dominant Internal and External Factors in the Performance of Human Resources in the Precast Company Rachmawati, Dyah; Wijatmiko, Indradi; Devia, Yatnanta Padma
ASTONJADRO Vol. 12 No. 2 (2023): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v12i2.9089

Abstract

The performance of human resources (HR) in a company is one of the determinants of the company's condition in the industry. This can be analyzed based on the dominant factors that support or become the foundation of the company. This study reviews the dominant internal and external factors in PT.BEP company. The research method used is descriptive qualitative with analysis using IPA, Pareto Chart, IFAS-EFAS Matrix, and SWOT. The results showed that internal factors were dominated by ability factors with a processing value of 13.49%, while external factors were dominated by reward factors with a percentage of 16.42%. The results of the SWOT analysis recommend that the strategy that should be implemented is Strength-Opportunity (SO) with IFAS EFAS results in quadrant I with coordinates 1.67;2.34. then PT. BEP is in an advantageous situation because it has good strengths and opportunities and can be optimized by minimizing all weaknesses and threats.
Analysis Of Dominant Factors Affecting Construction Service Providers On Tender Electronically In Malang Raya 2021 Ayu Sabrina, Nabila; Wijatmiko, Indradi; Wisnumurti, Wisnumurti
International Journal of Science, Technology & Management Vol. 4 No. 1 (2023): January 2023
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v4i1.703

Abstract

Provider process service construction participates in tenders electronics in Malang Raya; provider service construction will upload an offer or no for a project and make an offer that requires commitment source power. The influencing factors include the characteristics project, the ability company, the challenge operational project, the Economy, the environment, the market, and the government. The study aims to know the dominant factor influencing _ provider service construction bids on delicate electronics located in Malang Raya in 2021. Five hundred and fifty-nine respondents are provider service construction ever _ upload requirements nor only view tenders _ electronics at LPSE Malang Raya. Method research used _ is interviews and questionnaires — data analysis using Structure Equation Modeling (SEM) with SmartPLS (Partial Least Square) software. Modeling results bid Y = 0.123 X1 + 0.325 X2 + 0.196 X3 + 0.406 X4 Effect dominant leading provider service construction bid on Tender directly electronics at LPSE Malang Raya is a category of Economy, Environment, Market, and Government (X4) with Variable Replacement Value loss (X4.4). Influence dominant second that is category Enterprise Capability (X2) with variable Profitability (X2.3). Influence chief third category Challenge Operational Project (X3) with variable Availability another project (X3.4). And Influence dominant final category Characteristics Project (X1) with variable Tender Method (One File) (X1.8) Keywords: Tender, Construction Service Provider, Structural Equation Modeling (SEM), SmartPLS (Partial Least Square).
Correlation Analysis Between Inundation Depth and Land Cover Change in the Jatiroto Watershed, Lumajang, Indonesia Nabilla Syafa; Suharyanto, Agus; Wijatmiko, Indradi
Rekayasa Sipil Vol. 20 No. 2 (2026): Rekayasa Sipil Vol. 20 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2026.020.02.5

Abstract

Understanding how land cover changes influence flood inundation is essential for effective watershed management in rapidly developing areas. This study investigates the correlation between inundation depth and land cover transformation in the Jatiroto Watershed, Lumajang, Indonesia, from 1995 to 2023. Using an integrated hydrologic–hydraulic modeling framework that combines GeoHECRAS and GIS, flood depths were simulated under multiple land-cover scenarios derived from Landsat imagery. Spearman’s rank correlation analysis was then applied to quantify the relationships between inundation depth and specific land cover classes. The results indicate that converting natural vegetation to urban and agricultural uses significantly increased the extent and depth of flood inundation. From 1995 to 2023, flooded areas expanded from 12.88% to 15.66%, while the mean inundation depth increased by approximately 0.4 m. The statistical analysis revealed strong positive correlations between inundation depth and open land (? = 0.819), residential areas (? = 0.757), and wetlands (? = 0.743), whereas forest cover exhibited a strong negative correlation (? = –0.819). These findings demonstrate that the expansion of impervious surfaces directly elevates flood severity, while vegetation plays a vital mitigating role. This study provides a comprehensive understanding of the statistical relationship between land-cover composition and flood behavior, offering valuable insights for flood risk management, zoning policy, and sustainable watershed planning in tropical regions.
Modification of Flood Vulnerability Models Based on BNPB Regulation 2012 (Case Study: Jatiroto Watershed, Lumajang) Athallah, Regina Salsabila; Suharyanto, Agus; Wijatmiko, Indradi
Rekayasa Sipil Vol. 20 No. 2 (2026): Rekayasa Sipil Vol. 20 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2026.020.02.6

Abstract

Floods are the most frequent natural disaster in Indonesia and have caused significant social, economic, and environmental losses, making mitigation measures based on regional vulnerability essential. Flood risk assessments in Indonesia generally rely on InaRISK maps developed by the National Disaster Management Agency (BNPB). This study develops a modified flood vulnerability calculation model based on BNPB Regulation No. 2 of 2012. It compares its results with the InaRISK vulnerability map for the Jatiroto watershed in Lumajang Regency. The analysis considers four components: social, economic, infrastructure, and ecology, with the main novelty being the reversal of ecological weighting so that larger areas of forests, shrubs, and swamps reduce, rather than increase, vulnerability, in line with hydrological reasoning. The modified model yields an RMSE of 0.224 and an MAE of 0.203, with an NRMSE of 0.23 and an NMAE of 0.21, indicating good agreement with InaRISK (NRMSE < 0.3). The findings show that adjusting ecological parameters can produce a more contextual and accurate vulnerability pattern and provide a simple, public-data-based alternative for local governments to update flood vulnerability maps and potentially inform future refinement of ecological parameters in national flood risk guidelines.
Exploring Opportunities for Integrating Building Information Modeling with Circular Economy Principles in Construction: A Survey using Relative Importance Index Jumadi, Jiescodala; Negara, Kartika Puspa; Wijatmiko, Indradi
Rekayasa Sipil Vol. 20 No. 2 (2026): Rekayasa Sipil Vol. 20 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2026.020.02.13

Abstract

The construction sector in Indonesia—especially in East Java—is expanding rapidly, yet this growth has intensified concerns about resource use, construction waste, and environmental impacts. In this context, adopting Circular Economy (CE) strategies, particularly the 3R principles (reduce–reuse–recycle), has become increasingly urgent. However, practitioners still lack clear, empirically grounded guidance on which Building Information Modeling (BIM)-enabled CE integration opportunities to prioritize for practical implementation in real project environments. To address this gap, this study conducted a purposive-sampling questionnaire survey of BIM-experienced professionals from construction companies with project experience in East Java and prioritized integration opportunities using the Relative Importance Index (RII), preceded by instrument validity and reliability testing. The results indicate that the instrument is statistically robust: all items are valid and demonstrate strong item–total relationships, with excellent internal consistency across the scale. The prioritization shows consistently high agreement across all proposed opportunities. Integrating BIM with green building certifications and standards emerges as the top priority, followed by BIM-based web tools that function as material and component banks to support traceability and circular use. Digital Twin integration and BIM-based decision-support systems form the next priority tier. At the same time, Visual Programming Language (VPL) automation and BIM–Life Cycle Assessment (LCA) implementation remain well perceived but are considered comparatively less urgent. Overall, this research provides a context-specific, evidence-based priority order of BIM–CE integration opportunities for East Java, offering actionable guidance for practitioners and supporting future BIM–CE implementation research in Indonesia.
Flood Inundation Mapping Based on Land Use and Land Cover Change in Jatiroto Watershed, Lumajang, Indonesia Nabilla Syafa; Agus Suharyanto; Indradi Wijatmiko
Journal of Novel Engineering Science and Technology Vol. 5 No. 01 (2026): Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i01.1279

Abstract

Floods are one of the most frequent natural disasters and cause considerable economic, infrastructure, and social losses, especially in areas experiencing land use/land cover change (LULC). In this study, we use GeoHECRAS and GIS to model the flood risk due to historic land use changes in the Jatiroto watershed (DAS Jatiroto) in Lumajang (East Java, Indonesia). The study evaluates the consequences of land-cover conversion between 1995 and 2023 on flood processes, including the variations of flood extent, depth, and duration. Rainfall, land use, soil types, and topography data were used to construct the flood prediction model, and the model was validated with historical flooding events. The findings indicate that the flood area is found to have increased substantially from 12.22% in 1995 to 15.66% in 2023. Moreover, flood depth was also raised, particularly in areas with urban and agricultural expansion.  The research emphasizes that land-use changes play a significant role in raising the flood risk and that GeoHECRAS can simulate the flood incidences. These results can be useful for the optimization of flood disaster management and prevention in the rapidly urbanizing areas. More robust flood risk management strategies could be developed if the effects of climate change were taken into account in future studies on flood risk modeling simulations.
Effect of Land Use and Land Cover Change on Inundation and Flood Loss Value in Lumajang District Regina Salsabila Athallah; Agus Suharyanto; Indradi Wijatmiko
Journal of Novel Engineering Science and Technology Vol. 5 No. 01 (2026): Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i01.1281

Abstract

This study examines the relationship between land cover change and the extent of inundation and the value of economic losses due to flooding in Lumajang district in 1995, 2014, and 2023. Using a spatial approach based on satellite imagery and hydraulic simulation, as well as the ECLAC method in calculating losses, this study shows that the loss of natural land cover, such as forests and wetlands, as well as the expansion of residential areas, contributed significantly to the increase in inundation intensity and economic losses. These findings are important for spatial planning that is adaptive to hydrometeorological disaster risks. In addition, this research also supports the implementation of mitigation policies based on spatial and hydrological data that are appropriate to the conditions of the Jatiroto watershed.
Co-Authors ., Saniyyah Agus Suharyanto Agus Suharyanto Ahmad B., Jeka Ahtisya, Syauqi Akbar, Muhammad Allena, Gabrielle Alwafi Pujiraharjo Amiroh, Habibatul Andrea Saputra A. P. Ari Wibowo Ari Wibowo Arief Rachmansyah Arief Rachmansyah Athallah, Regina Salsabila Aulia, Yusril Fatchi Avianindyas, Putri Ayu Sabrina, Nabila B.K., Bhondana Bayu B.K., Bhondana Bayu Bagaskoro, Yogi Tio Bhondana Bayu B.K Bhondana Bayu B.K Chasanah, Uswatun Christin Remayanti Christin Remayanti N Christin Remayanti N. Christin Remayanti Nainggolan Dabi, Fransiska R Devi Nuralinah Dika, Johan Wayan Eko Andi Suryo Eko Andi Suryo Fadillah, Andika Fadly Usman Faisal, Muhammad Faradina, Alifia FATRA NONGGALA PUTRA Fauzi, Rifqi Eka Febrian, Abid Febriyannor, Rifqy Firdausy, Ananda Insan Frizky Andrian Perdana Hadi Suyono Harijanto, Griffin Septian Harimurti . Harimurti Harimurti Hendro Suseno Herlambang, Jevri Herry Santosa Heryono, Cahyo Adhi Imansari, Aisyaning Indah Ria Riskiyah, Indah Ria Indra Waluyohadi, Indra Ismu Rini Dwi Ari Jumadi, Jiescodala Karima, Dhia Kartika Puspa Negara Keisuke Murakami Kusumawati, Nafisah Octa Laksana, Bayu Indra Ludfi Djakfar M Hamzah Hasyim M. Hamzah Hasyim M. Ruslin A., M. Ruslin M. Ruslin Anwar Maulana, Eka Ming Narto Wijaya Moch. Agus Choiron Molidan, Gingga Nabila, Meutia Aisyah Nabilla Syafa Nabilla Syafa Nainggolan, Christin Remayanti Noerman, Muhammad Fauzan NUGROHO, CANDRA ADI Permana, Arya Bagas Pradana, Sakti Arya Pramasida, Dipo Pramudito, Faishal Pratama, Dodi Rajendra Pratama, Rachmaniar Rizki Priambudi, Adhitya Pudyono . Pujiharjo, Alwafi Puspitasari, Ratri Putri, Enggie Herma RACHMAWATI, DYAH Rahmasari, Novita Rama, Rizal Regina Apituley Regina Salsabila Athallah Rokman, Mauhibur Rozaq, Rizal Fatchul Sabila, Ahmad Ariq Fihris Saifoe El Unas Saisbuwono Bauw, Umas Sanjaya, Gilang Edo Siburian, Jonathan Hasian Sirait, Christin Natalia Siti Nurlina Siti Nurlina Sri Murni Dewi Sri Murni Dewi, Hendro Suseno, Tatang Fendy Harianto, Sugeng P. Budio Sugeng Prayitno Budio Suroso, Yosephine Diajeng Janur Prasasti, As’ad Munawir, Suryo, Benediktus Rendy Diopasca Susilo, Joko Suwanda, Rizky Anas Syamnah Harahap, Muthiah Putrilan Ummah, Karimatul Usri Amrullah Utama, Singgih Fitra Vikriansyah, Andhika W, Dany Dwitama Wardhani, Arimurti Wisnu Wisnumurti . Wulandari, Fahima Yanda Christian Yatnanta Padma Devia Yudika Putra, Valentino Leonard Yulian, Albertus Eky Yulvi Zaika Yuniawati, Nungki