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Luthfi Muta'ali
Universitas Gadjah Mada
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Landslide Risk on the Farmland at the Arjuno Volcano Complex of East Java Nugroho Hari Purnomo; S Sutikno; S Sunarto; Luthfi Muta'ali
Forum Geografi Vol 27, No 1 (2013): July 2013
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v27i1.5081

Abstract

The purposes of the study are (1) studying the characteristics of the landslide hazard level, vulnerability, and capacity dealing with the seasonal plant farmland, and (2) developing the conceptual model disaster risk of landslide for the seasonal plant farmland at the stato volcano area. Sampling of the land factor was carried out in a purposive way and the sampling of the people was carried out accidentally. The analysis was conducted descriptively, parametric and non-parametric statistics, and spatial analysis of ecological map, land shape, slope, soil and land use. The findings showed that the extremely high landslide risk occurred at the cone shape of the incised volcano and the slope of the incised volcano. The economic vulnerability of one-seasonal crop farmland was about Rp. 8,879,310 ha/year-Rp. 44,036,061 ha/year. While, the socio-economic factor of the farmers was generally characterized by a transition into a periurban area. The conceptual model tated that the resources of seasonal plant farmland with the high risk of landslide can be cultivated with the acceptable risk if the vulnerability of agricultural commodity is low in economic value and the capacity of farmers cultivating it is high.
Analisis Spasial Sebaran Ruang Terbuka Hijau Publik (RTHP) Menggunakan NDVI dan Getis Ord G* di Kota Yogyakarta Satwika sista; Andri Kurniawan; Luthfi Muta'ali
JPIG (Jurnal Pendidikan dan Ilmu Geografi) Vol. 10 No. 2 (2025): September
Publisher : Geography Education Study Program, Universitas Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/jpig.v10i2.11966

Abstract

Public Green Open Space (RTHP) has an important role in maintaining environmental quality and urban sustainability, both in terms of ecology, social, and aesthetics. However, the distribution and quality of RTHP is often uneven in urban areas, including in Yogyakarta City. This study aims to analyse the quality of vegetation and spatial distribution of RTHP using the Normalised Difference Vegetation Index (NDVI) approach and Getis Ord G* spatial analysis. NDVI is calculated using Sentinel-2A satellite imagery and then averaged to determine the value in each RTHP to determine the level of vegetation in it. Meanwhile, the Getis Ord G* method was used to identify spatial clusters of green spaces per administrative area. The results showed that most of the green spaces had low to moderate levels of vegetation. The spatial distribution of RTHP in Yogyakarta City shows clusters of RTHP hotspots in Umbulharjo and Kotagede sub-districts, and coldspots in Gondomanan and Ngampilan sub-districts. These results indicate
Analisis Spasial Sebaran Ruang Terbuka Hijau Publik (RTHP) Menggunakan NDVI dan Getis Ord G* di Kota Yogyakarta Satwika sista; Andri Kurniawan; Luthfi Muta'ali
JPIG (Jurnal Pendidikan dan Ilmu Geografi) Vol. 10 No. 2 (2025): September
Publisher : Geography Education Study Program, Universitas Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/jpig.v10i2.11966

Abstract

Public Green Open Space (RTHP) has an important role in maintaining environmental quality and urban sustainability, both in terms of ecology, social, and aesthetics. However, the distribution and quality of RTHP is often uneven in urban areas, including in Yogyakarta City. This study aims to analyse the quality of vegetation and spatial distribution of RTHP using the Normalised Difference Vegetation Index (NDVI) approach and Getis Ord G* spatial analysis. NDVI is calculated using Sentinel-2A satellite imagery and then averaged to determine the value in each RTHP to determine the level of vegetation in it. Meanwhile, the Getis Ord G* method was used to identify spatial clusters of green spaces per administrative area. The results showed that most of the green spaces had low to moderate levels of vegetation. The spatial distribution of RTHP in Yogyakarta City shows clusters of RTHP hotspots in Umbulharjo and Kotagede sub-districts, and coldspots in Gondomanan and Ngampilan sub-districts. These results indicate
Co-Authors Andri Kurniawan Nugroho Hari Purnomo S Sunarto S Sutikno Satwika sista