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All Journal jgeo JURNAL SAINS GEOGRAFI
Hasmaulia, Qaanitah
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Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Environmental Science Social Sciences

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Analisis Fenomena Urban Heat Island (UHI) Multitemporal dengan Google Earth Engine (GEE) Di Kota Semarang Mariescha Mega Az Zahra; Hasmaulia, Qaanitah; Ash- Shidqi, Muhammad Rafi; Mataburu, Ilham Badaruddin
Jurnal Sains Geografi Vol 3 No 2 (2025): JURNAL SAINS GEOGRAFI
Publisher : Fakultas Ilmu Sosial dan Hukum, Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JSG.v3i2.05

Abstract

Climate change is one of the phenomena that is often the main topic of every country. However, since the 19th century, human actions have become the main factor in climate change that triggers various problems, one of which is the Urban Heat Island (UHI). Semarang City is one of the metropolitan cities on Java Island. According to the Central Statistics Agency of Semarang City, in the period 2019-2023, 2019 was the highest year in population growth rate in Semarang City, which was around 1.57 while the population growth rate in 2023 was around 0.9. This study aims to analyze the Urban Heat Island (UHI) phenomenon in Semarang City multitemporally from 2019-2024. The research method used is a quantitative method with a geospatial approach and remote sensing analysis. The data used are the administrative boundaries of Semarang City sub-districts and Landsat 8 Collection 2 satellite imagery obtained from GEE, then the data is processed to obtain a temperature distribution map in Semarang City in 2019-2024. The results show a relatively high frequency of surface temperatures in 2019 and decreased in 2020 to 2021 due to the pandemic and also the suppression of population growth. Temperatures began to rise as community activities resumed after the pandemic and the peak average temperature in 2024 exceeded the average temperature in 2019.
ANALISIS RAWAN KEKERINGAN DI DESA GIRICAHYO, KECAMATAN PURWOSARI, GUNUNG KIDUL Hasmaulia, Qaanitah
Jurnal Geografi Vol 21 No 2 (2025): JURNAL GEOGRAFI
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jgeo.v21i2.22814

Abstract

This study analyzed drought vulnerability levels in Giricahyo Village, Gunungkidul Regency, Special Region of Yogyakarta, using a Geographic Information System (GIS) approach. The karst area, characterized by porous geological features, results in limited surface water availability, particularly during the dry season. The research method involved collecting spatial and non-spatial data, including rainfall, soil type, slope gradient, geology, and land use, which were processed using GIS-based overlay techniques. The results showed that Giricahyo Village is classified into five drought vulnerability levels, dominated by low (7.986 km²) and moderately low (4.897 km²) vulnerability, while high vulnerability (1.598 km²) was found in steep-sloped areas with porous Lithosol soil. The primary contributing factors were the combination of steep slopes, Lithosol soil, and suboptimal rainwater absorption due to karst geology. Field validation confirmed a 42.5% consistency between predictions and actual conditions, with discrepancies mainly in areas with piped water supply (PAM) infrastructure. Community adaptation through rainwater harvesting and clean water distribution proved effective in mitigating drought impacts. This study recommends drought mitigation-based spatial planning and sustainable water resource management for karst region.
Co-Authors Ash- Shidqi, Muhammad Rafi Ilham B. Mataburu Mariescha Mega Az Zahra