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All Journal Sinergi Jurnal Penelitian Pendidikan IPA (JPPIPA)
Lestari, Valdya Hartati
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Integrasi Evaluasi Kesesuaian Lahan dan Pengelolaan Lahan Lokal Bawang Merah di Kecamatan Larangan, Kabupaten Brebes: Aplikasi Pendekatan Ilmu Pertanian Terapan Lestari, Valdya Hartati; Suryaningtyas, Dyah Tjahyandari; Mulatsih, Sri
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.11719

Abstract

Larangan District as one of the centers of shallot production with the highest potential in Brebes Regency, Indonesia shows that the intensive land management system practiced by local farmers with excessive agrochemical inputs has caused negative environmental impacts and a decline in shallot production. This study aims to integrate agricultural land suitability evaluation with local land management of shallot, through the agricultural science technology approach for increase productivity of shallot and preserving local land management. The research methods include soil sampling, laboratory analysis, spatial data analysis using the matching and overlay method employing Inverse Distance Weighting Interpolation (IDW), as well as an social data analysis with ethnographic approach through in-depth interviews and participatory observation, and also descriptive analysis. The results shows that the actual land suitability of shallot are 2,564.95 ha as S2 class with limiting factors of rainfall, root medium, nutrient retention, and available nutrients, 7,140.05 ha as S3 class and 6,284.99 ha as N class with limiting factor of rainfall. The integration of agricultural science technology with local land management practices, such as gilir giring water management and mupuk organic fertilization, offers a sustainable pathway to address limiting factors with implementation of GIS-based zoning programs combined with farmer field schools for knowledge transfer that synthesizes scientific innovation, without compromising local farming community.
Land cover changes, built-up and vegetation density, and the Urban Heat Island (UHI) phenomenon in Pekanbaru City Sari, Meassa Monikha; Dewi, Atri Prautama; Lestari, Valdya Hartati; Deviro, Sonya Okta
SINERGI Vol 30, No 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.004

Abstract

Pekanbaru city has a high population growth rate and is currently experiencing rapid urbanization, which is driving urban expansion. Urban development alters land cover patterns and reduces environmental quality. The development of residential areas and infrastructure reduces vegetation, affecting Land Surface Temperature (LST) and contributing to the emergence of the Urban Heat Island (UHI) phenomenon. This study aims to analyze changes in land cover, examine the correlation between LST and the Normalized Difference Built-up Index (NDBI) and the Normalized Difference Vegetation Index (NDVI), and then investigate the UHI phenomenon in Pekanbaru City. The research method is quantitative, using data from Pekanbaru City, an administrative map, and Landsat 8 OLI/TIRS imagery, which were spatially analyzed in ARGIS and QGIS. The novelty is the use of guided classification and maximum likelihood algorithms for land cover classification, which revealed significant changes over the five years from 2018 to 2023 in Pekanbaru City. Over 5 years, land cover in the city of Pekanbaru changed, with water bodies increasing by 23%, palm areas increasing by 5%, built-up areas increasing by 34%, and vegetation increasing by 10%, while bare land decreased by 57%. There are significant changes in built-up and vegetation density. The correlation between land surface temperature and built-up density is positive; however, it is negatively correlated with vegetation density. There is an urban heat island phenomenon in Pekanbaru City, characterized by surface temperatures exceeding the UHI threshold. 
Co-Authors Deviro, Sonya Okta Dewi, Atri Prautama Dyah Tjahyandari Suryaningtyas Meassa Monikha Sari, Meassa Monikha Sri Mulatsih