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All Journal Jurnal Perencanaan Wilayah Jurnal Sains dan Teknologi Pangan JURNAL PENDIDIKAN TAMBUSAI Jurnal Teknik Informatika (JUTIF) Arus Jurnal Sosial dan Humaniora Almufi Jurnal Pengabdian kepada Masyarakat Sultra Jurnal Pengabdian Masyarakat AGRONES: JOURNAL OF AGRICULTURE, AGRIBUSINESS WELFARE, TECHNOLOGI, HUMANITY, ENVIRONMENT, SOCIAL AND ECONOMY
Erni Danggi
Universitas Sulawesi Tenggara
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Transportation Other

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Sentinel-2 NDVI Analysis Using GEE and QGIS for Green Open Space Sustainability Assessment in Kendari City Sufrianto, Sufrianto; Yaacob Zubir, Siti Sara; Jassin, Andi Makkawaru Isazarni; Brata, Joko Tri; Danggi, Erni; Sallu, Sulfikar
Jurnal Teknik Informatika (Jutif) Vol. 6 No. 6 (2025): JUTIF Volume 6, Number 6, Desember 2025
Publisher : Informatika, Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jutif.2025.6.6.5409

Abstract

Rapid urbanization has profoundly transformed land cover in many growing cities, leading to a substantial decline in Green Open Space (GOS) and a progressive deterioration of ecological functions. The continuous conversion of vegetated zones into impervious and built-up surfaces has reduced the city’s ability to absorb carbon, regulate local microclimates, and maintain overall ecological resilience. Consequently, assessing the sustainability and spatial distribution of GOS is crucial for ensuring environmentally balanced urban development and resilience to future land-use pressures. This study aims to evaluate the sustainability of urban green spaces in Kendari City through an integrated geospatial approach that combines remote sensing and open-source cloud computing technologies. Sentinel-2 Level-2A imagery was analyzed in Google Earth Engine (GEE) using the QA60 band for cloud masking and spatial clipping to accurately define the study boundaries. Normalized Difference Vegetation Index (NDVI) values were subsequently processed and classified in QGIS using a reclassification technique to distinguish vegetation density categories. The results indicate that 56.7% of the total land area, equivalent to 15,213 hectares, exhibits high greenness, reflecting dense and healthy vegetation, whereas 32.3% consists of low or non-vegetated surfaces dominated by built-up and barren lands. These findings reveal substantial spatial disparities in vegetation coverage and underscore the importance of sustainable land management and green infrastructure policies. Furthermore, this research contributes to the advancement of geospatial informatics by developing an open, reproducible workflow that integrates cloud-based computation and open-source GIS for urban ecological monitoring and sustainability assessment.
The Effect of the Biomass Weight Ratio of Patchouli Leaves and Sawdust on the Chemical Properties of Patchouli Briquettes Amal Muliono; La Oge; Erni Danggi; Rustan Ari; Hastian Hastian; Wa Ode Nur Siti Fatimah
Journal of Agriculture, Agribusiness, Welfare, Technology, Humanity, Environment, Social, and Economy Vol. 2 No. 1 (2026): April - June 2026 Edition
Publisher : Fakultas Teknologi Pertanian Unsultra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64690/agrones.v2i1.735

Abstract

The increasing depletion of fossil fuel reserves and rising global energy demand have accelerated the development of renewable energy sources, particularly biomass-based fuels. This study aimed to analyze the effect of biomass weight ratios of patchouli leaf waste and sawdust on the chemical properties and combustion rate of charcoal briquettes, and to determine the optimum composition for producing high-quality briquettes. The research was conducted in Wakumoro Village, Parigi District, Muna Regency, Southeast Sulawesi, from October to November 2025. A Completely Randomized Design (CRD) was applied with five treatment levels and three replications. The treatments consisted of different ratios of patchouli leaves and sawdust: P1 (100% patchouli leaves), P2 (75% + 25%), P3 (50% + 50%), P4 (25% + 75%), and P5 (100% sawdust). The observed parameters included moisture content, ash content, and combustion rate. Data were analyzed using Analysis of Variance (ANOVA) followed by Duncan’s Multiple Range Test (DMRT) at a 95% confidence level. The results showed that biomass composition significantly affected moisture content, ash content, and combustion rate of briquettes. The best overall performance was obtained in P2, with moisture content of 1.57% and ash content of 7.48%, both meeting the Indonesian National Standard (SNI 01-6235-2000). The highest combustion rate was observed in P3 at 6.93 g/min. These findings indicate that the combination of patchouli leaf waste and sawdust has strong potential as an environmentally friendly alternative fuel and provides an effective solution for agricultural and wood waste utilization.  
Co-Authors AA Sudharmawan, AA Amal Muliono Andi Bahrun BT. Tolo, Suriani Fatmawati L, St. Hajar Hajar Hastian Hastian Hijriani Hijriani, Hijriani Jassin, Andi Makkawaru Isazarni Jawiah, St. Joko Tri Brata Kasmawati Kasmawati Khayati, Sri La Ode Abdul Manan La Ode Bariun La Ode Munawir, La Ode La Oge Makkawaru, Andi Muhammad Fitriadi Rustan Ari Sasmita, Farra Sitti Hawa St. Fatmawati.L Subhan Sufrianto, Sufrianto Sulfikar Sallu Suriani BT Tolo Suriani BT Tolo Tamrin Tamrin Tolo, Suriani BT Wa Ode Dien Indalestari Wa Ode Nur Siti Fatimah Wahidin Wahidin Wira Yudha Yaacob Zubir, Siti Sara