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All Journal Journal of Creative Student Research Manufaktur: Publikasi Sub Rumpun Ilmu Keteknikan Industri
Alberth Einstein Stevann Abrauw
Universitas Cenderawasih
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Social Sciences Transportation

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Evaluasi Rantai Layanan Air Limbah Domestik dan Risiko Lingkungan di Kabupaten Mimika Alberth Einstein Stevann Abrauw; Alfred Benjamin Alfons; Rosi Fitriyanti Sumedi; Maria Rosari Paembong
Journal of Creative Student Research Vol. 4 No. 4 (2026): Agustus: Journal of Creative Student Research
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jcsr-politama.v4i4.6497

Abstract

Mimika Regency is experiencing rapid economic growth and urbanization, which has put significant pressure on the domestic sanitation system. The lack of integrated downstream management, combined with biophysical conditions such as the dominance of aerated glei soils, extreme rainfall, and shallow groundwater levels, increases the risk of aquifer contamination and serious environmental pollution. This study aims to untangle the domestic wastewater service chain and identify the resulting environmental risks as a basis for developing a sustainable sanitation strategy. The study uses a descriptive-evaluative approach that integrates a service chain analysis (Shit Flow Assessment), spatial analysis of at-risk areas, and environmental hydrogeological studies based on data from the EHRA Study, the District Sanitation Strategy (SSK), and the geological conditions of the region. The results show that the sanitation system does not meet SDGs standards; 43.99% of the population still defecates in the open, 38% of septic tanks are unsafe, and downstream management (transportation/treatment) reaches 0% due to the non-operational Iwaka Wastewater Treatment Plant (IPLT). These conditions pose a high risk of pathogen contamination in community water sources, especially in the Mimika Baru, Wania, and Iwaka Districts. Recommended strategies include accelerating IPTL operations, strengthening regulations, institutions, and technological interventions.
Integrasi Analisis Spasial dan Geoteknik Massa Batuan untuk Mitigasi Longsor di Kampung Yongsu Sapari, Kabupaten Jayapura Marcelino Novryanto Yonas; Johannes Ferdinand Wally; Alberth Einstein Stevann Abrauw; Lia Medy Tandi
Manufaktur: Publikasi Sub Rumpun Ilmu Keteknikan Industri Vol. 4 No. 3 (2026): Manufaktur : Publikasi Sub Rumpun Ilmu
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/manufaktur.v4i3.1730

Abstract

Yongsu Sapari Village occupies a narrow coastal corridor on the northern flank of the Cycloops Mountains, where steep relief, developed lineaments, and limited flat land place roads, settlements, and cultivation activities close to potentially unstable rock slopes. This study integrates regional spatial information and site-scale rock-mass characterization to formulate landslide-mitigation-oriented land-use directions. The analysis combined thematic-map and satellite-image interpretation with Schmidt hammer testing at four points, an 8 m scanline containing eight discontinuities, Priest-Hudson-based RQD* estimation, RMRbasic classification under five groundwater scenarios, kinematic assessment of planar, wedge, and toppling failures, and Slope Mass Rating (SMR). Spatial evidence was synthesized using an evidence-based decision matrix rather than a fully quantitative weighted overlay because detailed slope raster, rainfall, groundwater, soil-depth, and complete landslide-inventory data were not available. Estimated UCS ranges from 40.69 to 114.71 MPa, with a mean of 72.09 MPa. RQD* reaches approximately 99.53%, while RMRbasic varies from 58.75 to 73.75, corresponding to fair-to-good rock-mass quality depending on groundwater conditions. Despite this relatively favorable RMRbasic, kinematic analysis of a 070/65 slope with an assumed friction angle of 30 degrees indicates possible planar failure on J1 (077/57), toppling on J2, J4, and J5, and a feasible-to-borderline wedge at the J5-J6 intersection. The controlling planar SMR is 31.25 under dry conditions and decreases to 16.25 under flowing-water conditions. Spatially, the two inventoried landslides occur along a road corridor at the foot of steep slopes and downslope of medium-to-high lineament-density zones. The findings show that land-use control should combine regional spatial context with local structural-geotechnical evidence, prioritize drainage and slope stabilization along critical road segments, retain forested upslope areas, and restrict new development toward upper slopes and source-runout pathways.
Co-Authors Alfons, Alfred Benjamin Johannes Ferdinand Wally Lia Medy Tandi Marcelino Novryanto Yonas Maria Rosari Paembong Rosi Fitriyanti S