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All Journal Indonesian Journal of Geography JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards)
Farisan, Ardhan
Unknown Affiliation
Earth & Planetary Sciences Environmental Science

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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.  
Co-Authors Bahagiarti, Sari Chusni Ansori Dyah Probowati, Dyah Hadian, M Sapari Dwi Istiana Rahatmawati, Istiana Lubis, Rachmat F Nandian Mareta, Nandian Nurwantari, Nanda Ajeng P Saputro, Sugeng Setyaningrum, Tuti Zakaria, Muhammad Faizal