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All Journal J SIG (Jurnal Sains Informasi Geografi) Jurnal Media Informatika Jurnal Spasial: Penelitian, Terapan Ilmu Geografi dan Pendidikan Geografi
Saputra, Ridho Abdhe
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Agriculture, Biological Sciences & Forestry Astronomy Computer Science & IT Earth & Planetary Sciences Energy Environmental Science Physics Social Sciences

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Kajian pengaruh perubahan penutup lahan terhadap kenaikan suhu permukaan di Kota Yogyakarta Nuraini Sekarsih, Fitria; Khasanah, Uswatun; Gangga, Panji Setya; Saputra, Ridho Abdhe
Jurnal Media Informatika Vol. 5 No. 2 (2024): Jurnal Media Informatika
Publisher : Jurnal Media Informatika

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Abstract

Land cover in Yogyakarta City has changed during 2013-2023. This change is predicted to be the cause of surface temperature increasing in Yogyakarta City. Analysis of the influence of these factors on surface temperature was carried out using Landsat 8 imagery with 4 stages, 1) downloading and making corrections of images; 2) processing the image to obtain the surface temperature value; 3) processing the image to obtain land cover, built-up land, and humidity index values; and 4) making sampling to analyze the relationship between surface temperature and land cover. As a result, there was 0.380 C surface temperature increasing during 2013-2023. This is in line with changes in land cover in Yogyakarta City where the vegetation index has decreased, while the built-up land index has increased. In 2013, land cover was the dominant factor in surface temperature in Yogyakarta City, and it affected of 91.16%. Meanwhile, in 2023 the influence of land cover was only 49.42%. The pandemic era can be a reference for the influence of pollutants on surface temperatures. The results show that there was a significant decrease in temperature during the pandemic become 30.140C. This data is supported by the increase number in motorized vehicles in the City of Yogyakarta. The increase number of motorized vehicle is about 124% in the past decade.
ANALISIS PENGARUH PERUBAHAN TUTUPAN LAHAN TERHADAP SUHU PERMUKAAN DI KOTA BANDAR LAMPUNG TAHUN 2013 DAN 2023 Saputra, Ridho Abdhe; Sekarsih, Fitria Nuraini
Jurnal Spasial Vol 11, No 3 (2024)
Publisher : Program Studi Pendidikan Geografi Universitas PGRI Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22202/js.v11i3.9909

Abstract

Over a period of 10 years, there has been an increase in the population in Bandar Lampung City which has caused changes in land cover. As a result, surface temperatures have increased, especially in urban areas. Therefore, this study was conducted to determine the distribution and effect of changes in land cover on surface temperatures. Remote sensing methods were used to calculate the spatial distribution of surface temperatures and to calculate changes in the area of vegetation index values, built-up land indexes, and humidity indexes in Bandar Lampung City in 2013 and 2023. The results showed an increase in surface temperature of 1.92℃. In 2013, the average temperature was 25℃ and increased in 2023 to 26.92℃. Compared to 2013, the temperature distribution area (26-28℃) has expanded by around 8673.39 Ha spread throughout Bandar Lampung City. Based on the results of the coefficient correlation analysis, it is known that the increase in surface temperature is significantly due to changes in land cover, especially by the building index (NDBI), with a determination coefficient (R²) of 0.545 for 2013 and 0.5133 for 2023.
KERENTANAN SOSIAL TERHADAP BAHAYA LONGSOR DI KECAMATAN GIRIMULYO, KULON PROGO Riasasi, Widiyana; Saputra, Ridho Abdhe; Wahyuni, Desri
J SIG (Jurnal Sains Informasi Geografi) Vol 6, No 2 (2023): Edisi November
Publisher : Universitas Muhammadiyah Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31314/jsig.v6i2.2463

Abstract

Landslide is one of the hazards that threatens and has the potential to cause material losses and even fatalities. In 2021, one-third of the disasters in Indonesia are landslides. Landslides are caused by physical factors and human activities. Vulnerability measurement is needed to calculate disaster risk. Geographic Information Systems (GIS) plays a significant role in disaster management because it can provide a spatial and mathematical picture. This study aims to assess the level of vulnerability of society in the social sector to the threat of landslides in Kecamatan Girimulyo, Kulon Progo Regency, Special Region of Yogyakarta Province, which is analyzed spatially. The measurement of social vulnerability follows the guidelines issued by the National Disaster Management Agency using parameters of population density and vulnerable groups. The study area covers four subdistricts, namely Purwosari, Pendowoharjo, Jatimulyo, and Giripurwo. Kecamatan Girimulyo is located in an area dominated by hills and mountains, reaching an altitude of 500 meters above sea level. Data were obtained from the Girimulyo sub-district statistics center and the Geospatial Information Agency. Scoring and weighting methods are used to assess each parameter in order to obtain an index of social vulnerability to landslide threats. The results of the calculation of the population density parameter in Kecamatan Girimulyo show two classes, low and middle. The sex ratio measurement shows that the study area is included in the low class, the vulnerability dependency ratio is included in the middle class, and the classification of the disability ratio is included in the low class. The similarity of the study areas for each parameter indicates that the characteristics of the population are relatively the same or homogeneous. The social vulnerability index in Kecamatan Girimulyo is included in the low category. This indicates that the people of Kecamatan Girimulyo are socially prepared in the event of a landslide.
Co-Authors Desri Wahyuni Gangga, Panji Setya Nuraini Sekarsih, Fitria Riasasi, Widiyana Sekarsih, Fitria Nuraini Sembiring, Rinawati