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All Journal Indonesian Journal of Geography JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Journal of Applied Sciences, Management and Engineering Technology (JASMET)
Farisan, Ardhan
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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A Preliminary Study of Paleoflood Deposits of the Lukulo, Kebumen Regency, Central Java, based on River Geomorphology Mareta, Nandian; Lubis, Rachmat F; Ansori, Chusni; Hadian, M Sapari Dwi; P Saputro, Sugeng; Farisan, Ardhan
Indonesian Journal of Geography Vol 56, No 1 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.75926

Abstract

Lukulo is a river that flows through pre-tertiary rocks to the recent. The long Lukulo fluvial processes which included erosion, transportation, and deposition were depicted in extensive alluvial deposits downstream of the river. This vast alluvial plain may be a deposit result of the Lukulo flood in the past. The paleo-flood study is a study of flood events in the past with the technique used, namely knowing slack water deposits (Steding & Baker, 1987). Delineation of slackwater deposits is necessary to determine the location of paleoflood deposition. Geomorphology of Lukulo watershed is needed as a preliminary study to determine the characteristics of the Lukulo watershed. Based on the analysis of the Lukulo watershed, DEM, with the systematic method of literature review, the result of this watershed geomorphology was obtained, namely; the morphology of the Lukulo watershed included an elongated oblong shape of the watershed, with an average Rc value of all three segments (upstream, middle, and downstream) of 0,52. The average drainage density (Dd) of river flows in the Lukulo watershed is 8,05 km/km2 (middle class). The Lukulo gradient upstream is 450, entering the middle is reduced to 300, and downstream the gradient is reduced to 100. The morphology and morphometry of the Lukulo watershed are interpreted to mean that Lukulo belongs to the medium-spanned watershed in terms of flood runoff and erosion. The lithology is a mixture of impermeable and permeable rocks. Delineation of diluvial and alluvial deposits is found in the upstream, middle, and downstream, of the Lukulo river. It depicts delineated paleoflood deposits in all segments of the river.
Analysis of Baturagung Reservoir Leaking, Gedangrejo, Gunung Kidul Regency using Digital Outcrop Model Method Farisan, Ardhan; Bahagiarti, Sari; Nurwantari, Nanda Ajeng; Setyaningrum, Tuti; Rahatmawati, Istiana; Zakaria, Muhammad Faizal; Probowati, Dyah
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.482

Abstract

Water, serving as a vital resource, finds applications in diverse sectors such as agriculture (irrigation), drinking watersupply, flood control, and hydroelectric power generation. On a smaller scale, the construction of "Embung" or smallartificial reservoirs facilitates water storage during the rainy season for subsequent use in the dry season. Within thestudy area, a reservoir constructed in 2018 has never attained full capacity, a circumstance that piqued the author'sinterest. A combined approach utilizing aerial photogrammetry and ground observation is employed for comprehensiveanalysis. Aerial photogrammetry yields an extensive and accurately depicted geometric representation of geologicalstructures. The investigation focuses on the Semilir Formation, a volcanic formation. Findings reveal that the studyarea manifests a division into nine (9) segments discerned from distinct structural trends. These segments are delineatedby eight (8) faults, with the major fault identified as Fault F6. Fault F6 exhibits a prevailing NNE-SSW trend,consistent with the primary fault on the regional geological map. Notably, Fault F6 encompasses a substantial faultzone traversing the Baturagung Reservoir and stands accountable for the reservoir's leakage.  
Application of Point Counting Petrography for Provenance Determination; Implication for Tectonic Development from the Semilir Formation, Gunung Kidul Krisnabudhi, Alfathony; Rizky, Aga; Farisan, Ardhan; Isnani, Desi Kumala; Widada, Sugeng; Ardine, Joseph Emmanuel; Aiman, Muhammad Naufal; Tony, Brian; Mardiati, Dani
Journal of Applied Sciences, Management and Engineering Technology Vol 6, No 2 (2025)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2025.v6i2.8198

Abstract

The provenance sediments have been analyzed to reveal tectonic development during the Semilir Formation deposition in the Southern Mountain of Yogyakarta area, using essential samples from field observation, petrography analysis, and the point counting method. Outcrop and sampling at two observation points revealed distinct lithological features, including sandstone and siltstone with mudclast structures and slump structures interbedded with siderite. Petrographic analysis using the point-counting method determined the mineral composition of four samples: 1A, 1B, 2A, and 2B. Samples 1A and 1B were categorized as Lithic Wacke, 2A Feldspathic Wacke, and 2B Lithic Wacke. Provenance analysis, crucial for understanding the sedimentary history and reconstructing the geological events preceding sediment deposition, identified that the sandstones in the Ngoro-oro region predominantly fall into the magmatic arc category. Hence, based on our analysis, the tectonic development during Semilir Fm deposition is linked with the convergence event of the first subduction on southern Java, which had huge volcanic influences and slope morphology common in volcanic areas. The findings of this study contribute to a deeper understanding of the tectonosedimentary processes and geological history of the Ngoro-oro region. The integrated approach of petrographic and provenance analyses provides a comprehensive view of the sedimentary rocks formation and evolution, enriching the geological knowledge of the area.
Co-Authors Aiman, Muhammad Naufal Alfathony Krisnabudhi Ardine, Joseph Emmanuel Bahagiarti, Sari Chusni Ansori Dani Mardiati, S.T., M.Eng. Dyah Probowati, Dyah Hadian, M Sapari Dwi Isnani, Desi Kumala Istiana Rahatmawati, Istiana Lubis, Rachmat F Nandian Mareta, Nandian Nurwantari, Nanda Ajeng P Saputro, Sugeng Rizky, Aga Setyaningrum, Tuti Sugeng Widada Tony, Brian Zakaria, Muhammad Faizal