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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Spektran Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) International Journal of Engineering and Emerging Technology Industrial and Domestic Waste Management
Ida Ayu Rai Widhiawati
Program Studi Teknik Sipil, Universitas Udayana, Bali
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Mechanical Engineering

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Preferences For Controlling Occupational Health and Safety Risk In The Building Projects Ida Ayu Rai Widhiawati
International Journal of Engineering and Emerging Technology Vol 6 No 1 (2021): January - June
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJEET.2021.v06.i01.p07

Abstract

Abstract Building projects have the complexity and massive frequency of procurement that can trigger work accidents. Although different efforts have been made, there are still work injuries, one of which is caused by employees who are uncomfortable with the control measures being taken. The aim of this analysis is to find alternatives or solutions in controlling OHS regulation. In order to assess the degree of risk, risk analysis was performed by multiplying the probability value with the concequence. Risk management was performed by referring to the hierarchy of OHS risk control based on OHSAS 18001. Questionnaires were administered using the method of purposeful sampling to assess the choice of field workers and OHS officers for OHS risk management. 168 hazards were described in this study, 24 hazards (14.2%) were classified as low risk, 94 hazards (55.95%) as moderate risk, 49 hazards (29.17%) as high risk, and 1 hazard (0.6%) as very high risk. From the point of view of the OHS officer, the preference for OHS risk control in the very high-risk category was the administrative method, the personal protective equipment (PPE) method in the high-risk category, and the engineering controls were liable for the moderate and low risks. In the meanwhile, from the point of view of the field workers, the control preference in the very high risk category was by administrative method, by the personal protective equipment (PPE) method in the high and moderate risks, and by the engineering controls in the low risk category.
Assessment of Surface Water Quality Status Using the Pollution Index Method in Tukad Badung River Kadek Diana Harmayani; Ni Made Pertiwi Jaya; Ida Ayu Rai Widhiawati; I Gede Andy Andika Parahita; Ngakan Gede Agung Khrisna Wiryananda; Ni Nyoman Dewi Supriyani; Daniel Rizal Mahendra; I Gusti Agung Gede Wiranata Baskhara; Debora Sofia Fransiska Hutagalung
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 1 (2023): March 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i1.175-185

Abstract

This research proposes to find out the present state of the water's purity in Tukad Badung through an examination of the Pollution Index (PI) adopted from the methodology presented by the Water Quality Index (WQI), which was presented by the Indonesian Ministry of Environment. A series of water samples were taken at three river flow points in the Denpasar City area, representing the upstream, middle, and downstream areas. The water quality parameters were determined based on the characteristics of domestic wastewater pollutant sources that are identified in watershed areas. In accordance with Regulation 22 of the Government of 2021 concerning quality standards for river water used for drinking water, the average concentrations of Total Suspended Solid (TSS), Ammonia, Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) parameters have exceeded quality standards. Meanwhile, the oil and grease parameter, as well as detergents, still meet quality standards. The PI at three monitoring points was obtained at 2.41 – 4.27, categorized as lightly polluted. In the future, efforts to deal with water pollution are critical to meet the downstream water quality standards used as drinking water.
Determining the Suitable Location of Constructed Wetland for the Polluted River Water Treatment Based on Analytical Hierarchy Process and Geographic Information System Analysis Mahendra, Daniel Rizal; Harmayani, Kadek Diana; Jaya, Ni Made Pertiwi; Widhiawati, Ida Ayu Rai; Bhaskara, I Gusti Agung Gede Wiranata; Supriyani, Nyoman Dewi; Hutagalung, Debora Sofia Fransiska; Nagai, Masahiko
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 14 No 4 (2024): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.14.4.836

Abstract

The Tukad Badung River is a vital raw water source in Denpasar City and Badung Regency. Concerning the water pollution of the river, water treatment is necessary to manage the water quality. Constructed wetlands are a water treatment technology used for water purification. In this regard, information is essential regarding the appropriate location for the placement of the constructed wetland based on criteria related to the water treatment plant. The research was conducted to determine the suitability level of water treatment locations in the watershed using the Analytic Hierarchy Process method in integration with a Geographic Information System. The Geographic Information System analysis included overlaying steps of the processed and classified data from each criterion: land use, slope, and water pollution index. The Analytic Hierarchy Process method was carried out to obtain the weight of each criterion down to the sub-criteria, which were compiled through interviews with three informants from academic, government, and community representatives. Weight calculations were performed using Expert Choice 11 software to obtain weight values with a consistency ratio of < 0.1. Geographic Information System analysis using the Analytic Hierarchy Process method produces three suitable land types according to the level of suitability for water treatment locations, with constructed wetlands located in the upstream, middle, and downstream parts of the river. Information regarding suitable land is useful for planning the technical design of water treatment plants with constructed wetlands.
Occupational Health and Safety Risk Analysis Using Hazard Identification, Risk Assessment, and Risk Control Method at Final Waste Disposal Site Suwung, Bali Baskara Andika, Ida Bagus Made; Sauqi, Muhammad Zuvisco; Widhiawati, Ida Ayu Rai
Industrial and Domestic Waste Management Volume 6 - Issue 1 - 2026
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v6i1.1064

Abstract

The Suwung Final Waste Processing Site, the largest landfill in Bali, faced major challenges, including overcapacity of waste piles, high fire risks due to methane gas accumulation, and the lack of a structured Occupational Health and Safety (OHS) system. These conditions posed significant hazards that directly affected the safety and health of workers. This study aimed to identify hazards, assess risk levels, and recommend appropriate risk control measures for operational activities at TPA Suwung. This research was conducted at TPA Suwung from March to April 2025, involving 18 workers as respondents. The study focused on four key operational activities: waste truck mobilization, waste reception, landfill structuring, and heavy equipment maintenance. The analysis was carried out using the Hazard Identification, Risk Assessment, and Risk Control (HIRARC) method to systematically evaluate and manage occupational risks. A total of 30 potential hazards were identified, classified into five categories: physical, mechanical, chemical, biological, and ergonomic. The risk assessment indicated that 3.33% of the risks were low, 36.67% medium, 56.67% high, and 3.33% extreme. The recommended control measures included one elimination, two substitutions, eight engineering controls, twelve administrative controls, and five uses of personal protective equipment (PPE). The findings indicated a high proportion of hazards with significant risk levels, underscoring the urgent need for comprehensive risk mitigation. Effective implementation of the recommended control measures was expected to improve occupational safety and health at TPA Suwung. Strengthening OHS management systems and conducting regular monitoring were crucial to sustaining a safe and healthy work environment.
Co-Authors A. A. G. A. Yana A.A. Asmara A.A. Bayu Maha Kesuma Putra Anak Agung Wiranata Ariany Frederika Baskara Andika, Ida Bagus Made Bhaskara, I Gusti Agung Gede Wiranata Daniel Rizal Mahendra Debora Sofia Fransiska Hutagalung Dhian C. Nur Astina G.N.P Suwandira Gd. Astawa Diputra Gede Astawa Diputra Gede Wira Hadinata Hutagalung, Debora Sofia Fransiska I Dewa Gede Marsta Laksmana I Gede Andy Andika Parahita I Gede Putra Pradipta I Gede Putu Joni I Gusti Agung Adnyana Putera I Gusti Agung Gede Wiranata Baskhara I Komang Trisna Satria Pramartha I Made Agus Ariawan I Made Dwi Bhaskara Nugraha I Nyoman Yudha Astana I Putu Indra Sanjaya I Putu Yudha Wirawan Ida Bagus Rai Adnyana Kadek Diana Harmayani Kadek Diana Harmayani Karina Renardi Made Arya Wira Santosa Mahendra, Daniel Rizal Mayun Nadiasa Nagai, Masahiko Ngk. Gd. A. Khrisna Wiryananda Ni Luh Ayu Indrayani Ni Made Pertiwi Jaya Ni Nyoman Dewi Supriyani Ni Nyoman Pujianiki Okta Arita Dewi Putu Gede Benny Artha Retno Retno Sanjaya, I Putu Ari Sauqi, Muhammad Zuvisco Supriyani, Nyoman Dewi Widiadnyana, Putu Egges Yenni Ciawi