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All Journal Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun International Journal of Hydrological and Environmental for Sustainability
Indriyawati, Agapetalia
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Environmental Science Health Professions

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Pelatihan Pembuatan Pupuk dan Monitoring Suhu Menggunakan Alat Pembuat Pupuk Kompos Telaumbanua, Mareli; Karo-Karo, Pulung; Syah, Aminudin; Telaumbanua, Syukur; Indriyawati, Agapetalia
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 5 No. 3 (2024)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v5i3.180

Abstract

Pupuk kompos berbahan limbah pertanian/peternakan belum termanfaatkan secara optimal oleh petani/peternak. Mitra kelompok tani di Desa Rejomulyo memiliki pengetahuan dan keterampilan yang kurang dalam pembuatan pupuk kompos. Selain itu, proses pembuatan pupuk kompos yang ditandai dengan kenaikan suhu sulit dipantau. Oleh karena itu, petani memerlukan prosedur tahapan pengolahan pupuk kompos dengan monitoring suhu. Tujuan kegiatan ini adalah meningkatkan pengetahuan dan keterampilan melalui pengolahan pupuk kompos dengan menerapkan alat pembuat pupuk kompos. Metode pelaksanaan kegiatan terdiri dari sosialisasi, diskusi, tanya jawab, demonstrasi dan praktik. Evaluasi kegiatan pengabdian menunjukkan adanya peningkatan pengetahuan mitra kelompok sebesar 44,85% dan keterampilan sebesar 50,00%. Dengan demikian, pengabdian ini telah berhasil meningkatkan pengetahuan dan keterampilan mitra dalam pembuatan pupuk kompos dan aplikasi alat.
Analysis of Subsurface Faults Using 3D Gravity Method Based On Satellite Image Data: Insights into Indo-Australian and Eurasian Plate Subduction in the Formation of An Accretionary Prism Dewi, Kadek Ciptani Satria; Siregar, Rahmat Nawi; Ningati, Trisna Ikhsan; Pulungan, Zumaida Nur; Indriyawati, Agapetalia; Takahashi, Hirotaka
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 3 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i3.960

Abstract

This geophysical study employs the gravity method to analyze subsurface fault structures in the Simeulue Island region, located between 1°59′S–3°14′S and 95°06′E–96°59′E. The area lies within an active tectonic zone where the IndoAustralian Plate subducts beneath the Eurasian Plate, making it a critical site for understanding subduction dynamics and accretionary prism formation. Secondary gravity and topographic data were acquired from TOPEX satellite imagery. The primary objective is to identify gravity anomalies and delineate subsurface geological features such as faults, folds, and fractures—based on variations in the Earth's gravitational field caused by density contrasts between rock units. The gravity method is particularly effective due to its sensitivity to such density differences. Qualitative interpretation was conducted using Surfer 16, while quantitative modeling utilized Oasis Montaj. Results reveal high Bouguer anomaly values in the southwest, corresponding to the plate convergence zone, and low anomaly values extending from the southeast to northwest, associated with the accretionary prism. The 2D model illustrates the subduction of oceanic crust with a density of 3.43 g/cm³ beneath continental crust with a density of 2.67 g/cm³. The 3D model further reveals that subduction becomes evident at a depth of approximately 16.11 km, with the crustal thickness in the accretionary prism zone reaching around 19.92 km. The 3D approach provides a more comprehensive spatial visualization of the subduction geometry and density distribution, offering insights that surpass conventional 2D analysis. These findings contribute to a deeper understanding of regional geodynamics and may serve as a reference for seismotectonic studies and disaster mitigation efforts in the surrounding area.
Co-Authors Dewi, Kadek Ciptani Satria Mareli Telaumbanua Ningati, Trisna Ikhsan Pulung Karo-Karo Pulungan, Zumaida Nur Siregar, Rahmat Nawi Syah, Aminudin Takahashi, Hirotaka Telaumbanua, Syukur