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A Analisis Fosil Foraminifera Formasi Wonosari dan Formasi Oyo Pembentuk Morfologi Karst Gunung Sewu Bagian Timur Silmi Afina Aliyan; Vera Christanti Agusta; Ayi Syaeful Bahri
BULLET : Jurnal Multidisiplin Ilmu Vol. 2 No. 1 (2023): BULLET : Jurnal Multidisiplin Ilmu
Publisher : CV. Multi Kreasi Media

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Abstract

Gunungsewu is one of the areas that has the second largest karst landscape in Indonesia. The diversity of morphology in the karst hill area makes this area interesting for research, especially by researchers in the field of geology. In the western region towards Gunung Kidul the formation of karst produces a morphology in the form of conical hills and in the eastern region towards Pacitan produces a morphology dominated by the formation of vertical caves. The Pacitan area is still limited in terms of information on the characteristics of the limestones that make it up, including the fossils that make up the limestones in this area. This paper describes the diversity of foraminifera fossils that make up the Wonosari and Oyo formations. Comparison of samples from the two formations, both planktonic and benthic fossils, shows the age and depositional environment of these two formations. The diversity of foraminifera fossils found in these two formations provides a new perspective on the age order in the Gunungsewu karst area. The presence of abundant Groborotalia mayeri fossils in both formations, which are well preserved, indicates that the Pacitan karst area was formed in the Middle Miocene. Meanwhile, the presence of benthic fossils indicates a deep littoral to neritic depositional environment from the Wonosari Formation and the Oyo Formation
Implementasi Geo-KKP Sebagai Penerapan E-Government di BPN Kantor Pertanahan Kabupaten Bogor I Mohamad Zein Surya Pandega; Syahrul Rivaldi; Silmi Afina Aliyan
BULLET : Jurnal Multidisiplin Ilmu Vol. 2 No. 3 (2023): BULLET : Jurnal Multidisiplin Ilmu
Publisher : CV. Multi Kreasi Media

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Abstract

In 2010, the Ministry of Agrarian Affairs/National Land Agency launched a land administration system known as the Computerized Land Office (KKP), then underwent development and changed its name to Geo-KKP, where this system allows integration between textual and spatial data and is able to minimize error in mapping. Textual data is data in the form of text that describes the physical condition of the land, such as location, location, land condition, and land area. The purpose of this study was to analyze what obstacles were faced by the National Land Agency of Bogor Regency I in implementing Geo-KKP to validate textual data and Geo-KKP as an application of E-Government at BPN Bogor Regency I. The method used in this study was the Qualitative research uses data collection in the form of literature studies and interviews with informants. The results of the study show that the digitalization process is running as it should, supported by the availability of qualified tools and resources in their fields. However, in its implementation, there are still several obstacles, namely the lack of sufficient resources to digitize, resulting in an accumulation of physical files.
Pemetaan Daerah Potensi Longsor Menggunakan Analisis Fault Fracture Density Pada Data DEMNAS Di Wilayah Cisarua, Kabupaten Bandung Barat, Jawa Barat Silmi Afina Aliyan; Totok Doyo Pamungkas; Kusnahadi Susanto; Putri Aprilia Ayesha
Jurnal Geografi, Edukasi dan Lingkungan (JGEL) Vol. 7 No. 2 (2023): Edisi Bulan Juli
Publisher : Pendidikan Geografi Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jgel.v7i2.11397

Abstract

The Cisarua area is located in the northern part of Bandung City and is one of the sub-districts in West Bandung Regency and has steep topography in several locations, giving rise to the potential for landslides. The eastern region is part of the Lembang Fault which is still active in the North Bandung area. The potential for landslides related to the geological structure in this area can be identified by looking at the lineament patterns of the valleys, the presence of lithological offsets and others. The geological structure that developed in the Cisarua area was identified based on the results of analysis of satellite imagery data and the National Digital Elevation Model (DEMNAS) to identify the presence of geological structures and determine the direction of the dominant force. This study aims to determine the distribution of potential landslides in the Cisarua area using the Fault Fracture Density (FFD) method. Linearity analysis is estimated using the Fault Fracture Density (FFD) method. This method produces an analysis based on the straightness of the ridges and valleys around Cisarua which is then processed using a rosette diagram and interpreted as the dominant lineament trending west-east and northeast- southwest, this dominant lineament corresponds to the direction of the Lembang Fault. The lineament density level value describes a weak zone in the rock which creates the potential for landslide hazard. The weak zone in red indicates that the study area has a high landslide hazard potential, which is red, and the light green color indicates that the study area has a low landslide hazard potential. The potential for landslides in the study area is spread more in areas close to regional geological structures such as faults when compared to other areas. This pattern indicates that the presence of geological structures has an influence on the occurrence of landslides in potential areas.