Article Per Year (5 Year)
p-Index From 2021 - 2026
6.982
P-Index
This Author published in this journals
All Journal JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Jurnal Teknik Sipil PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Journal of Community Based Environmental Engineering and Management Jurnal Kesmas (Kesehatan Masyarakat) Khatulistiwa Jurnal Rekayasa Teknik Sipil dan Lingkungan Indonesian Journal of Multidisciplinary Science Jurnal Teknologi Lingkungan Lahan Basah
Azwa Nirmala
Tanjungpura Univerisity
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Public Health Social Sciences Transportation Other

Published : 68 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 68 Documents
Search

 3   4   5   6   7 
TAILING POND MAINTENANCE SYSTEM PT. DINAMIKA SEJAHTERA MANDIRI AT THE TERAJU SITE, TOBA DISTRICT, SANGGAU REGENCY Gazhian, Syarif Rafhi; Nirmala, Azwa; Aprillia, Ricka; Sutrisno, H.; Meilasari, F.
Jurnal Teknik Sipil Vol 22, No 2 (2022): JURNAL TEKNIK SIPIL EDISI DESEMBER 2022
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v22i2.59158

Abstract

PT. Dinamika Sejahtera Mandiri has 6 settling ponds. One of the factors that must be considered in mining activities is the residue from the washing process that will enter the settling pond. Pool conditions at PT. The Mandiri Sejahtera Dynamics seems to be almost full, which requires a study on the maintenance of the settling pond to be carried out. This research aims to plan and schedule the dredging of the settling pond and the addition of tools for optimal pond maintenance.The research was conducted by collecting primary and secondary data, primary data consisting of tailings samples, circulation time, and full discharge time. While secondary data consists of rainfall, equipment specifications, pond depth, and pond area. Then it will be processed from the calculation of planned rainfall, rainwater discharge, percent solid, particle velocity, settling material, pond dredging time and the number of additional tools.
VALIDATION OF TROPICAL RAINFALL MEASURING MISSION (TRMM) RAINFALL DATA FOR THE KAPUAS HULU DISTRICT AREA Tangkadas, Charles Gonzaga; Soeryamassoeka, SB; Nirmala, Azwa
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.66513

Abstract

Rainfall is a critical element in the hydrological cycle. Therefore, accurate rainfall inputs are essential for reliable hydrological predictions in various water resource analyses. Many areas in the tropics depend on rainfall for multiple needs because rainfall has an essential influence on numerous aspects of human life, especially in water resources planning and management. However, not all areas have rainfall recording stations using manual rain and gauges or automatic rainfall recorders, so rainfall records are rarely complete; this is also the case in Kapuas Hulu District, West Kalimantan Province.This research article presents the results of TRMM satellite rainfall data research in Kapuas Hulu District, with validated rainfall data, 1-day maximum rainfall data, and rainfall amount data. Validation stages are carried out by calibrating, verifying, and correcting rainfall data. As a comparison station (dependent variable) is the BMKG Pangsuma observation station, KPH-06 Nanga Kantuk, KPH-08 Ng. Silat, KPH-09 Jongkong, KPH-13 Tepuai in 1998-2019.The results of the analysis show that the best correlation value on the amount of rainfall data and 1-day maximum rainfall data obtained from Grid 30 TRMM of 0.83 and 0.82 with the observation station is BMKG Pangsuma Station, and then the equation obtained from the analysis results on the grid is used as an equation for correction. The data correction equation for the amount of rainfall is Y = 1.1578 X - 98.5547, and the 1-day maximum rainfall data correction equation is Y = 1.2036 X - 28.4197.
FLOW HYDROGRAPH GENERATION FOR MELAWI SUB-WATERSHED USING THE SNYDER SYNTHETIC UNIT HYDROGRAPH MODEL Muslim, Alfin Islami Ibnu; Soeryamassoeka, S. B.; Nirmala, Azwa
Jurnal Teknik Sipil Vol 24, No 2 (2024): Vol 24, No 2 (2024): JURNAL TEKNIK SIPIL EDISI MEI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i2.69006

Abstract

The study, titled "Flow Hydrograph Generation for Melawi Sub-Watershed Using the Snyder Synthetic Unit Hydrograph Model," investigates the hydrological response of the Melawi Sub-Watershed in West Kalimantan to rainfall events using the Snyder Synthetic Unit Hydrograph Model (SUHM). This model, instrumental in areas with limited hydrological data, is well-suited for the Melawi Sub-Watershed. The analysis uncovers a peak discharge (Qp) of 13.671 m ³/sec with a time to peak (Tp) of 88.905 hours, highlighting the region"™s susceptibility to prolonged rainfall. The model"™s parameters, such as Ct and Cp, are used to generate accurate flow hydrographs, which are essential for flood management. The results show varying design discharges for different return periods (Q2 to Q100), providing critical data for flood risk mitigation and infrastructure planning. This research underscores the SUHM's effectiveness in flood forecasting and sustainable development, aiding in resilient flood management strategies and informed infrastructure design in the Melawi Sub-Watershed. The findings of this study also pave the way for future research in hydrology and flood management.
PRODUCTIVITY STUDY OF HYDRAULIC BREAKER EXCAVATOR, PT HANSINDO MINERAL PERSADA, SUNGAI PINYUH DISTRICT, MEMPAWAH DISTRICT, WEST KALIMANTAN PROVINCE Wahyudi, Tri; Nirmala, Azwa; Syafrianto, M. Khalid
Jurnal Teknik Sipil Vol 23, No 4 (2023): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i4.67284

Abstract

PT Hansindo Mineral Persada is a granite mining company. Mining activities at PT Hansindo Mineral Persada use blasting and the help of a hydraulic excavator breaker to break up boulders. The crusher setting at PT Hansindo has a size of 50 cm, so rocks above 50 cm must be crushed first to make them smaller. The research aims to gain the capability of equipment production. Thus, it can assist in meeting production and cost requirements. Apart from that, this is also an effort to increase the production of hydraulic excavator breakers. Data collection in the field is carried out by observing cycle times, work constraints, working time, operational costs, the need for fuel, lubricants, etc. Then, the data is calculated on cycle time, effective working time, number of production tools, and operational costs. After that, it is necessary to make improvements during the effective working time of the obstacles that occur or to increase the number of hydraulic excavator breakers. The calculation results show that the production capacity of one hydraulic breaker excavator unit is 21.77 BCM/hour or 4,277.98 BCM/month. The operational cost for one tool is IDR 2,944,133.88/day. The increased production of the two recommended alternatives resulted in an increase of up to 4,468.41 BCM/month by improving the effective working time and 8,583.03 BCM/month by increasing the number of tools. The value of tool availability for MA increased by 0.1%, PA by 0%, UA increased by around 4%, and EU increased by around 4%.
DETERMINATION OF THE PRIORITY SCALE OF FLOOD MANAGEMENT IN THE LANDAK SUB-WATERSHED Akafi, M. Ma'ruf; Soeryamassoeka, SB; Gunarto, Danang; Nirmala, Azwa; Danial, Mochammad Meddy
Jurnal Teknik Sipil Vol 23, No 2 (2023): JURNAL TEKNIK SIPIL EDISI MEI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i2.64168

Abstract

The Landak Sub Watershed is part of Indonesia's Kapuas River Basin, covering an area of approximately 7,921 km2 and comprising three administrative regions: Landak Regency, Kubu Raya Regency, and Pontianak City. Like other regions in Indonesia, the frequency of flood events in the Landak Sub Watershed has been increasing each year, becoming a severe problem as it has caused losses for the community. Therefore, a study is needed to provide an overview of the most suitable flood management measures to minimize floods in the Landak Sub Watershed.This article presents the research results to determine the priority scale of flood mitigation measures suitable for implementation in the Landak Sub Watershed using the Analytic Hierarchy Process (AHP). The determination of criteria, sub-criteria, and flood management alternatives is based on the results of a Focus Group Discussion (FGD) held in Ngabang City on August 30, 2022. The selected flood management alternatives combine both structural and non-structural measures. Once the hierarchy is established, a questionnaire is distributed to determine the appropriate options for flood mitigation in the Landak Sub Watershed.The study results indicate that the priority scale for flood mitigation in the Landak Sub Watershed is by revising regulations and policies. The analysis shows that the priority criterion is Law and Institutions with a weight of 0.376, the priority sub-criterion is Legislation with a weight of 0.213, and the priority alternative is the revision of regulations and policies with a weight of 0.1984. For the correction of rules and procedures to be effectively carried out, all stakeholders related to flood control in the Landak Sub Watershed must be involved.
KAJIAN KESELAMATAN DAN KESEHATAN KERJA (K3) PADA AKTIVITAS PELEDAKAN (BLASTING) PT. BORNEO BINTANG PASIFIK JOB SITE CV. MENTARI MANDIRI KOTA SINGKAWANG PROVINSI KALIMANTAN BARAT Sari, Anisya Permata; Nirmala, Azwa; Setiawati, Septami
JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Vol 9, No 1 (2022): JeLAST EDIS FEBRUARI 2022
Publisher : JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jelast.v9i1.52856

Abstract

Keselamatan dan Kesehatan kerja (K3) perlu diperhatikan pada kegiatan aktivitas peledakan oleh suatu peusahaan. Karena pada kegiatan aktivitas peledakan dapat terjadi potensi kecelakaan kerja yang bisa berakibat pada kualitas kinerja perusahaan dan pekerja. Tujuan dari penelitian ini yaitu untuk mengidentifikasi potensi bahaya risiko, tingkat risiko dan merekomendasikan pengendalian risiko pada kecelakaan kerja pada kegiataan peledakan khususnya di PT. Borneo Bintang Pasifik job site CV. Mentari Mandiri. Pada penelitian ini metode yang digunakan untuk analisis data yaitu metode job safety analysis (JSA) dengan tahapan mengidentifikasi potensi bahaya risiko, penilaian risiko dan pengendalian risiko. Hasil yang didapatkan dari penelitian ini yaitu terdapat 49 potensi bahaya dan 61 risiko dari 10 aktivitas peledakan. Dari hasil analisis tingkat risiko terdapat 5 tingkat penilaian dengan hasil substansial tingkat risiko yang besar yaitu 56,1% dengan 35 risiko, priority 1 tingkat risiko sebesar 24% dengan 15 risiko, very high tingkat risiko sebesar 10% dengan 6 risiko, priority 3 tingkat risiko sebesar 8% dengan 5 risiko dan Acceptable tingkat risiko paling kecil yaitu 2% dengan 1 risiko. Rekomedasi pengendalian risiko didapatkan eliminasi sejumlah 8,1%, substitusi sejumlah 2,7%, engineering sejumlah 13,5%, administrasi sejumlah 40,5% dan Alat Pelindung Diri (APD) sejumlah 35,1%.Kata Kunci: JSA, K3, Peledakan
EVALUASI SISTEM JARINGAN DISTRIBUSI AIR BERSIH (STUDI KASUS DI KECAMATAN SEKADAU HILIR KABUPATEN SEKADAU PROVINSI KALIMANTAN BARAT) Ahen, Martinus; Nirmala, Azwa; Gunarto, Danang
JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Vol 9, No 1 (2022): JeLAST EDIS FEBRUARI 2022
Publisher : JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jelast.v9i1.52882

Abstract

PDAM Sirin Meragun Kecamatan Sekadau Hilir melayani Desa Sungai Ringin, Mungguk, Tanjung, dan Bokak Sebumbun. Jumlah penduduk terlayani tahun 2020 hanya sekitar 30% dari total jumlah penduduk 28.168 jiwa. Untuk mendukung tingkat pelayanan air bersih pada penelitian ini dilakukan analisis kondisi eksisting dan merencanakan perbaikan menggunakan software Epanet 2.0. Penelitian melalui tiga tahap, pertama menentukan jumlah penduduk dengan metode Aritmatika, Geometrik, dan Least Square. dan dipilih satu metode dengan nilai deviasi terkecil. Kedua menentukan kebutuhan air jam puncak tahun 2020 dan tahun 2040. Ketiga simulasi jaringan distribusi dengan empat kondisi. Satu, kondisi eksisting dengan kebutuhan air tahun 2020. Dua, kondisi alternatif perbaikan jaringan tahun 2020. Tiga, kondisi jaringan dengan kebutuhan air tahun 2040. dan Empat, kondisi alternatif perbaikan jaringan tahun 2040. Proyeksi jumlah penduduk menggunakan metode aritmatika. Kebutuhan air jam puncak tahun 2020 sebesar 82,075 liter/detik, dan tahun 2040 sebesar 128,567 liter/detik. Hasil analisa simulasi satu terdapat pipa tidak memenuhi standar izin unit headloss. Pada simulasi dua dilakukan perubahan dimensi sebagai alternatif perbaikan simulasi satu. Simulasi tiga terdapat pipa tidak memenuhi standar izin unit headloss dan pressure. Pada simulasi empat dilakukan perubahan dimensi dan penambahan jalur pipa sebagai alternatif perbaikan pada simulasi tiga.Kata Kunci : Epanet 2.0, Jaringan, Proyeksi, Simulasi.
Kajian Teknis Penjadwalan Pemeliharaan Kolam Pengendapan (Tailing Pond) PT. Bumi Khatulistiwa Bauksit Site Meliau Kabupaten Sanggau Kalimantan Barat Kevin, Stephanus; Murad, Murad; Nirmala, Azwa
Jurnal Teknologi Lingkungan Lahan Basah Vol 14, No 1 (2026): January 2026
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v14i1.97384

Abstract

PT. Bumi Khatulistiwa Bauksit (PT. BKB), a bauxite mining company, faces challenges in maintaining its tailing ponds. The lack of a structured maintenance schedule has led to sediment accumulation, which risks pond shallowing and environmental contamination from potential overflow. This study aims to evaluate the condition of the settling ponds and establish an optimal maintenance schedule. A quantitative approach was employed, combining primary field data with secondary data. Analytical steps included calculating design rainfall, rainfall intensity, total discharge, solid percentage, settling velocity, and maintenance/dredging time based on pond volume and sediment accumulation. Results indicate the highest daily total discharge in Pond 1 (17,276.23 m³/day) and the lowest in Pond 5 (5,022.97 m³ /day). Maintenance intervals vary: Pond 1 requires dredging every 1 month and 7 days; Pond 2, every 1 month and 22 days; Pond 3, every 1 year and 5 months and 12 days; Pond 4, every 4 months and 18 days; and Pond 5, every 6 years and 5 months and 12 days. The excavator’s productivity reaches 447.93 m³/hour, with dredging time per pond ranging from 8 to 35 days.
Co-Authors - Aflahal - Kartini - Nurhayati - Nurhayati ., Winardi .l, Misno Ade Elbani Agani, Umar Ahen, Martinus Ahmad Afandi Akafi, M. Ma'ruf Akbar, Syarif Sutan Alamanda, Ivony Amelia, Siti Aprillia, Ricka Budhi Purwoko, Budhi Budi Budi Danang Gunarto Dea Indri Saputri Dian Rahayu Jati Diva Fadhila Eka Kristianto Raden EKO YULIANTO Eko Yulianto Eriani Eriani Fikriansyah, Irfan Fitriana Meilasari Fitriana Meilasari Fitriana Meilasari Fransiskus Higang Gazhian, Syarif Rafhi Gemilang Oktavia Ningrum Ginting, Nesci Ayu Gunarto, Danang Gustian, - Hadi, Tajrian Hafiyyan, Qalbi Halim, Hamdanu Hario Januardus Hendri Sutrisno Hendri Sutrisno Hendri Sutrisno Henny Herawati Herawati, Henny Herlambang, Yoga Herry Hajiansyah, Herry Inabuy, Shierly Lianda Jeani, Pebrian Rugok Jimmi Mulyanto Situmorang, Jimmi Mulyanto Kartini . Kaslina, Yohana Kausar, Muhammad Furqon Kevin, Stephanus Linda Suwarni Lusiana, Vira Magdalena Delvia, Magdalena Meilasari, F. Meilasari, Fitriana Meilinda Putri, R.r Fanny Mochammad Meddy Danial MS, Murad Muhammad Saleh Murad, Murad Muslim, Alfin Islami Ibnu Nashrullah Chatib, Nashrullah Neny, Veronika Oktavia, Stefani Bella Oktawijaya, Domie Pantun, Bintang Hasiholan Pontiraba, Christian Pratama, Rizqi Nanda Pratiwi Putri Dwi Randy Qutrunnada, Alifia Rahmarani, Destia Refi Ariqah Refi Ariqah Ricka Aprillia Rima Ardyanti Sahdimin, Sahdimin Sari, Anisya Permata Setiawati, Septami Shando Irwandinata, Ade Irfan Sibuea, Cristin Liony Cindy Siwamba, Tatwa Mreta Stefanus Barlian Soeryamassoeka Suharjo, Rachmad Brama Sulastri Sulastri Susanto, Nugroho Adji Sutrisno, H. Sutrisno, Hendri Suustra U, Apriyadi Syafnurhaq, Hafidz Syafrianto, M Khalid Syafrianto, Syafrianto Syahrudin Syahrudin, Syahrudin Syaifurrahman Syaifurrahman Tangkadas, Charles Gonzaga Tri Wahyudi Ulvy Nur Kibriyanti Umar Umar Utami, Novi Tri Vivi Bachtiar Wahdaniah Mukhtar Wandi, Thomas Yoga Herlambang Windy Ricka Wibowo Yohanes Fauzi Ervan Yusuf, Muhammad Yusuf