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All Journal Jurnal IPTEK INTEGER: Journal of Information Technology Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal Tika Journal of Applied Sciences, Management and Engineering Technology (JASMET) Jurnal Teknologi dan Manajemen Prosiding Seminar Nasional Teknik Elektro, Sistem Informasi, dan Teknik Informatika (SNESTIK) Prosiding Seminar Nasional Teknologi Industri Berkelanjutan Environmental Engineering Journal ITATS
Pratama Sandi Alala
Institut Teknologi Adhi Tama Surabaya
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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Analysis of Tawangsari River Water Quality Using the Pollution Index Method in Sidoarjo Regency, Indonesia, during the 2024 Observation Period Pratama Sandi Alala; Cahya Bagus Syah; Ayu Setyaning Sayekti Poesoko
Journal of Applied Sciences, Management and Engineering Technology Vol 7, No 1 (2026)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2026.v7i1.8645

Abstract

River water quality analysis is a fundamental component of environmental management, particularly for rivers with the potential to serve as raw water sources. The Tawangsari River is influenced by domestic activities and surrounding land use, which may contribute to gradual water quality degradation. This study aims to assess the water quality status of the Tawangsari River using the Pollution Index (PI) method. Water samples were collected at three monitoring points representing upstream, middle, and downstream river segments. Key water quality parameters analyzed included pH, turbidity, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD). The results indicate that the Pollution Index values classify the Tawangsari River as lightly polluted to moderately polluted, with the highest PI value observed at the middle segment of the river. Among the evaluated parameters, dissolved oxygen was identified as the dominant factor influencing the Pollution Index values. It should be noted that the assessment was conducted using a limited number of monitoring points within a single observation period. Despite these limitations, the findings provide a reliable overview of the current water quality status of the Tawangsari River and demonstrate the applicability of the Pollution Index method as a practical tool for river water quality assessment and management planning. Keywords: pollution index; river water quality; dissolved oxygen; environmental monitoring; water quality status
Evaluation of Occupational Safety and Health Implementation on Employee Performance in Limestone Mining Operations Pratama Sandi Alala; Afdi Dama Zafrila; Ayu Setyaning Sayekti Poesoko
Jurnal Teknologi dan Manajemen Vol 8, No 1 (2027): January (In Progress)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jtm.2027.v8i1.9265

Abstract

Occupational Safety and Health (OSH) plays a strategic role in improving operational performance in mining industries due to the high level of occupational hazards associated with mining activities. This study evaluates the implementation of Occupational Safety and Health (OSH) practices and their influence on employee performance at PT. Sinar Asia Fortuna, a limestone mining company located in Rembang Regency, Central Java, Indonesia. A mixed-method approach combining qualitative observation and quantitative analysis was employed. Primary data were collected through field observations, interviews, and structured questionnaires distributed to employees. The quantitative data were analyzed using validity testing, multiple linear regression, coefficient of determination, and analysis of variance (ANOVA). The findings indicate that several unsafe behaviors are still observed in mining activities, particularly the inconsistent use of personal protective equipment (PPE), inadequate supervision, and limited employee awareness regarding occupational safety procedures. Regression analysis demonstrates that occupational safety implementation significantly influences employee performance, although behavioral compliance remains the dominant factor affecting the effectiveness of the safety management system. Improving safety culture through continuous supervision, periodic training, and stronger enforcement of safety regulations is expected to reduce workplace risks while enhancing employee productivity. The study provides practical recommendations for strengthening safety management systems in surface limestone mining operations.
Co-Authors Adikusuma, Rahmatullah Wirya Afdi Dama Zafrila Agus Budianto Alfikri, Allif Mufti Andy Rachman Ayu Setyaning Sayekti Poesoko Bayu Fahmi Agustin Cahya Bagus Syah Dadang Bagus S Dandi Dwi Arifianto Efendi, Yanuar Erdhianto, Yoniv Erlinda Ningsih Fahrurrozi, Nanang Fatahillah Arinal Haq Hari Agus Sujono Hendro Nugroho Hendro Nugroho, Hendro HM, Gatot Basuki Ilmiatul Masfufiah Kafi, Nur Holis Lubis, Windi Nitasya Meynardo Dhanysa Setya Mifta Alwan Dzakwan Misbahul Munir Moch. Kalam Mollah Moh. Hasbi Ash Shiddieqy Muchamad Kurniawan Muhima, Rani Rotul Mukhlis Adi Wicaksono Mukti, Fajar Ali Nanang Fakhrur Rozi Nazilatun Niswa Novian Putra Uman Putra Putra, Muhammad Syahrur Ramdhani Putri, Rahmi Rizkiana Resa Uttungga Rifaldin, Handy Rodu Dhuha Afrianisa Rony, Zahara Tussoleha Silvia Ramadhani Silvia Sulistyowati Sulistyowati Sulistyowati Sulistyowati Sulistyowati, Riny susilowati, Sulistyowati Talent Nia Pramestyawati Taty Alfiah Yanuar Efendi