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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 14 Documents
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Search results for , issue "Vol 10 No 2 (2025): Energy Management and Sustainable Environment" : 14 Documents clear
TINGKAT BAHAYA EROSI LAHAN REKLAMASI TAMBANG BATUBARA KECAMATAN TEBO ILIR KABUPATEN TEBO PROVINSI JAMBI Hardian Wijaya; T. Listyani R.A; Rr. Amara Nugrahini
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5591

Abstract

In general, coal mining activities in Indonesia use open mining methods, which can cause several negative impacts on the environment due to changes in environmental conditions. Land clearing results in high rates of erosion and a decrease in soil quality. This research is aimed at determining the physical and chemical characteristics of the soil, the rate of erosion on mine reclamation land during different reclamation periods. The methods used in this research are literature study, taking soil samples in the field, analyzing erosion rates using the Universal Soil Loss Equation (USLE) method and to determine the physical and chemical quality of the soil through laboratory tests. The erosion rate value on reclaimed land A is 21.39 tons/ha/year, which is in erosion class II, light category. Reclamation land B 169.86 tonnes/ha/year with erosion class III, moderate category. The value of the erosion rate is greatly influenced by slope factors and vegetation factors which can improve the soil structure to make it more stable.
IDENTIFIKASI POLA CORE-PERIPHERY DI KAWASAN PERKOTAAN CEKUNGAN BANDUNG Saepulloh, Asep; Uny, Chivilya; Mokobombang, Sitty Rukmini; Joyodiningrat, M. Henry
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5708

Abstract

This study identifies the core-periphery pattern and distribution of core-periphery areas in the Bandung Basin Urban Area (KPCB), covering Bandung City, Cimahi, Bandung Regency, West Bandung, and parts of Sumedang. Analysis methods included Rank Spearman, Weighted Overlay, and spatial-statistical analysis using PODES 2018 data and satellite imagery. Rank Spearman results show that Population Density has the strongest correlation (40% weight), followed by Main Source of Income (30%), Land Use (20%), and Slope (10%). Weighted Overlay analysis reveals the dominance of core areas in the east and north, and periphery areas in the south and west, influenced by population density, infrastructure and settlements. Spatial autocorrelation showed a cluster pattern (z-score >2.58; Moran's Index 0.197). Cluster & Outlier Analysis confirms the core cluster is centered in Bandung and Cimahi with expansion to the east, north, and south, while the periphery is dominant in the west. The results are in line with Presidential Regulation No 45/2018, which establishes Bandung and Cimahi as urban cores with potential expansion to the surrounding areas. This pattern reflects structured development with resource access gaps between the core and periphery.
PENDEKATAN KUANTITATIF DALAM PENENTUAN DEBIT AIR MINE INFLOW PADA TAMBANG TERBUKA Ardinanta, Desta Nugraha; Cahyadi, Tedy Agung; Rosadi, Peter Eka; Ratminah, Wawong Dwi; Nusanto, Gunawan; Septianto, Erwin
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5789

Abstract

Luapan air ke tambang terbuka merupakan tantangan signifikan dalam operasi penambangan, karena berpotensi menyebabkan gangguan teknis dan peningkatan biaya. Tujuan dari studi ini adalah untuk memperkirakan total aliran masuk tambang melalui dua pendekatan. Pertama, Metode Rasional digunakan untuk menghitung limpasan permukaan. Kedua, Hukum Darcy digunakan untuk memperkirakan rembesan air tanah. Data yang digunakan mencakup parameter seperti curah hujan maksimum, daerah tangkapan air, koefisien limpasan, konduktivitas hidrolik, gradien hidrolik, dan luas penampang akuifer. Analisis menghasilkan debit limpasan permukaan maksimum sebesar 0,81 m³/detik dan rembesan air tanah sebesar 0,16 m³/detik. Total debit yang diperkirakan ke lantai tambang adalah 0,778 m³/detik, sedangkan total potensi ke seluruh area tambang mencapai 0,97 m³/detik. Perkiraan ini dapat menjadi dasar untuk perencanaan sistem drainase tambang yang efektif yang mendukung keberlanjutan operasional.
OPTIMALISASI SISTEM PENGOPERASIAN GENERATOR SET MENGGUNAKAN METODE LAGRANGE Dulhadi, Dulhadi; Suyanta; Pramudita, Eufrasia Andranetta Gracelynne Eka; Afifudin, Shodiq; Putri, Dewi Indriati Hadi; Pratama, Hafiyyan Putra
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5791

Abstract

Yogyakarta International Airport has high power demands, supplied by GI Wates with a subscribed capacity of 2 × 8.66 MVA and five generator sets (gensets) each with a capacity of 2.5 MVA. Due to fluctuating flight schedules, all gensets operate simultaneously, leading to inefficient fuel consumption. This study aims to optimize the genset operation pattern using the Lagrange method based on historical energy and fuel consumption trends. The results show that only genset 1 operates optimally (83.26%) under normal conditions. In the event of a genset failure, the load is redistributed to other gensets with lower output to maintain efficiency and reliability. This approach increases efficiency, reduces fuel consumption, and extends engine lifespan. The optimization supports more energy-efficient and reliable airport operations.
ANALISIS FAULT FRACTURE DENSITY (FFD) PADA ZONA RAWAN BENCANA TANAH LONGSOR KABUPATEN NGAWI Mutiara Jannah, Dea; Nugroho Budi Wibowo; Hana Rosyida; Fathunajah Elsha C.; Salma Khoirunnisa; Indar Mery Sulya A.; Icha Khaerunnisa
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5796

Abstract

Ngawi is one of the areas in East Java province with an area that has topographic variations in the form of lowlands and highlands, because of its location on the slopes of Mount Lawu. There are several areas in Ngawi Regency that have the potential to be prone to landslides, which were then identified as suitable between the landslide hazard map which was derived from combining rainfall parameters, slope slope and geological conditions. Next, the landslide hazard map was compared with the FFD map produced from DEM (Digital Elevation Model) alignment analysis. The resulting landslide map is in accordance with the FFD map produced, namely in Sine sub-district, Ngrambe sub-district, Jogorogo sub-district and Kendal sub-district.
TIPE INTERVAL T2- HUMMOCKY PADA ENDAPAN BADAI (TEMPESTIT), FORMASI NANGGULAN, PEGUNUNGAN KULON PROGO, YOGYAKARTA Nuraini, siti; Syafri, Ildrem; Muljana, Budi; Sudradjat , Adjat
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5800

Abstract

The composition of storm deposit layers (tempestites) is described as a normal sedimentary deposit or fining upward-deposit, divided into 3 units: the lower part, the middle part, and the upper part. The lower part is characterized by coarse clastics, the middle part known as T2 consists of a combination of hummocky and swalley layers containing finer clastics with good sorting. The upper part shows deposition of layering in increasingly calm current conditions with fine clastics: clay. The T2 interval is often considered a characteristic of turbidite deposit models due to gravity flow. However, on the other hand, the nature of storm-induced currents (hummocky-swalley) is more varied due to the role of 3 controlling currents: oscillatory currents, bottom currents, and combined currents. This study will investigate the characteristics of storm interval T2 (tempestites) in the Nanggulan Formation. The method applied is to generate stratigraphic sections for 3 sections (Kali Clumprit, Watupuru, and Songgo), age correlation and of paleocurrents analysis. Storm deposits are found in the Middle Eocene-aged Nanggulan Formation, showing a polymodal direction with opposing and branching within T2 interval. This pattern reflects two opposing directions: bottom currents and storm oscillatory currents. On the other hand, a combination current emerges, branching off from the main current pattern. The T2 Watupuru layer consists of overlapping hummocky layers that extend in a northwestward direction, indicating an ancient coastal or land area.
PERAN CITRA SATELIT LANSAT 8 OLI/TIRS UNTUK ANALISIS DAERAH RESAPAN AIR DI KABUPATEN MAGELANG, JAWA TENGAH Anggoro, Hengky; Winarti, Winarti
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to analyze the distribution of groundwater recharge potential areas in Magelang Regency using a Geographic Information System (GIS) approach and Landsat 8 OLI satellite imagery. The analysis was conducted by integrating four key parameters: land cover, soil type, slope gradient, and rainfall, utilizing a scoring and overlay method. Supporting data such as the National Digital Elevation Model (DEMNAS) were used for topographic analysis. Rainfall data were obtained from CHIRPS, while soil type maps were sourced from FAO/UNESCO to support spatial modeling. The results revealed that approximately 27% of the Magelang Regency area has high groundwater recharge potential, 59% falls into the moderate (natural) category, and 14% is classified as critical to highly critical. Areas with high recharge potential are generally characterized by dense vegetation cover, highly porous soils, and relatively gentle to moderate slopes. In contrast, areas with low recharge potential are commonly found in built-up regions and steep slopes that are prone to surface runoff. These findings are expected to provide valuable insights for groundwater conservation planning and sustainable land use management. The implementation of integrated conservation strategies is crucial to enhance soil infiltration capacity and maintain the hydrological cycle balance in Magelang Regency
PLANNING OF ROOFTOP SOLAR POWER PLANTS FOR INTEGRATED CLASSROOM AND LABORATORY BUILDINGS, SILIWANGI UNIVERSITY CAMPUS I Faridah, Linda; Muhammad Rasul Ja’fari; Usrah, Ifkar
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.6153

Abstract

The need for electrical energy in Indonesia is increasing, while dependence on fossil fuels remains dominant. One potential alternative is the utilization of solar energy through rooftop Solar Power Plants (PLTS). This study aims to design a rooftop PLTS system in the Integrated Classroom and Laboratory Building, Campus 1, Siliwangi University with a technical and economic approach. The research method includes collecting data on load profiles and potential solar radiation, designing system capacity, selecting main components, and simulating using PVsyst software to obtain estimates of energy production and system performance. The planning results show a design capacity of 71,107 Wp with a configuration of 118 solar panels with a capacity of 600 Wp, which produces energy production of around 299–318 kWh per day or equivalent to 109–116 MWh per year. The PVsyst simulation produces an average Performance Ratio value of around 80%, which is in the good category. However, the economic analysis using the Net Present Value (NPV) method shows a negative value (−996,310,000), so this project is not yet financially feasible if implemented in a fully off-grid scenario. In conclusion, the implementation of rooftop solar power plants in the Integrated Classroom and Laboratory Building, Campus 1, Siliwangi University is technically feasible, but not yet financially feasible under current conditions. Therefore, it is recommended to implement a hybrid or on-grid scenario, as well as an electricity tariff sensitivity analysis to increase economic feasibility.
Efektivitas Biokoagulan Cangkang Telur dan Kulit Pisang dalam Menurunkan TSS pada Air Limbah Tambang Batubara Novita Sari, Eva; Muryani, Eni; Algary, Tissia Ayu; Anasstasia, Titi Tiara; Yogafanny, Ekha
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.6196

Abstract

Industri pertambangan batubara menghasilkan limbah cair yang berpotensi mencemari lingkungan. Hasil analisis air limbah tambang batubara di PT Mifa Bersaudara menunjukkan parameter pH, Fe, dan Mn sudah sesuai baku mutu. Namun, kadar Total Suspended Solid (TSS) masih melebihi batas yang ditetapkan. Penelitian ini bertujuan untuk menganalisis kualitas awal air limbah tambang batubara serta menganalisis efektivitas cangkang telur dan kulit pisang sebagai biokoagulan alami dalam menurunkan TSS. Metode penelitian meliputi pengambilan sampel di Water Monitoring Point (WMP) 13, uji laboratorium dengan jar test, variasi dosis koagulan (cangkang telur 0-5 g/L, kulit pisang 0-2 g/L) dan waktu sedimentasi (30, 60, 90 menit). Hasil menunjukkan bahwa dosis optimum cangkang telur 2 g/L pada waktu 30 menit dapat menurunkan TSS dari 489 mg/L menjadi 138 mg/L, sedangkan dosis kulit pisang 1 g/L dapat menurunkan TSS menjadi 181 mg/L. Pemanfaatan biokoagulan alami ini terbukti efektif dan berpotensi menjadi alternatif ramah lingkungan sebagai pengganti koagulan kimia. Kata kunci: Air Limbah Tambang, Biokoagulan, Cangkang Telur, Kulit Pisang, TSS
SQUEEZE CEMENTING PLANNING USING BALANCE PLUG METHOD IN LOSS FORMATION ON “TBN-10” Prasetyo, Wahyu; Yunita, Lia
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.6246

Abstract

The TBN-10 well in the subang field is a production well that has experienced a decline in productivity, so it was decided to close the perforation zone in layer 9C using the squeeze cementing method and open a new perforation in layer 9D. This work faces challenges in the form of a loss circulation zone in the baturaja formation, so it is necessary to plan the appropriate cement method and composition. The squeeze cementing method is carried out using the balance plug method, accompanied by the selection of class G cement and special additives such as BAF-14L, BAR-19L, BAL-22L, BAG-17L, and BAF-26L to overcome high pressure conditions, high temperatures, and potential gas disturbances and fluid loss. The calculation of slurry volume, water head, water behind, displacement, and slurry specifications was carried out in detail resulting in a slurry requirement of 15.10 bbl. Laboratory test results showed a thickening time value of 4 hours 29 minutes at a consistency of 100 Bc and a compressive strength of 623 psi in 24 hours. Field evaluation showed that the cementing work successfully formed good isolation on the old perforation zone and allowed the opening of a new, more productive zone. This work successfully repaired the well integrity and became the basis for a workover strategy with a target of significantly increasing production from more economical layers.

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