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Djayus, Djayus
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Kajian Penggunaan Lahan dan Kondisi Topografi di Sub DAS Karang Mumus, Kota Samarinda Mislan, Mislan; Khoirunisa, Nanda; Rahmiati, Rahmiati; Djayus, Djayus; Supriyanto, Supriyanto
Akuatiklestari Vol 7 No 2 (2024): Jurnal Akuatiklestari
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/akuatiklestari.v7i2.6397

Abstract

Kualitas Sungai Karang Mumus yang menjadi sumber keberlangsungan hidup penduduk Kota Samarinda semakin menurun. Pengalihfungsian lahan dan peningkatan pembangunan menjadi faktor utama berubahnya kondisi fisik Sungai Karang Mumus. Penelitian ini betujuan untuk menganalisis perubahan penggunaan lahan dan kondisi topografi di Sub Daerah Aliran Sungai (DAS) Karang Mumus. Pengidentifikasian perubahan tutupan lahan menggunakan metode supervised classification pada citra Landsat 8 OLI/TIRS pada Tahun 2018 dan Tahun 2020. Wilayah Sub DAS Karang Mumus memiliki variasi ketinggian 0 hingga 255 mdpl dengan mayoritas keadan kontur landai dan datar. Secara geologis, Formasi Aluvium, Formasi Balikpapan, Formasi Kampung Baru, dan Formasi Pulau Balang mendominasi di wilayah penelitian dengan lapisan batu pasir kuarsa yang saling beririsan dan kandungan batu bara yang tersisip pada semua formasi kecuali pada Formasi Aluvium. Tanah jenis podsolik merah kuning menjadi yang paling dominan dan rentan terhadap erosi. Analisis menunjukkan bahwa beberapa penggunaan lahan yang mengalami peningkatan adalah semak/belukar, hutan tanaman, dan pertanian lahan kering yang dicampur dengan semak. Sedangkan, penggunaan lahan untuk sawah, pertambangan, lahan terbuka, dan perkebunan mengalami penurunan. Perubahan ini mempengaruhi koefisien aliran limpasan dan kapasitas resapan air di Sub DAS Karang Mumus, meningkatkan potensi bencana banjir. Reboisasi (afforestation dan reforestation) diidentifikasi sebagai solusi untuk melestarikan daerah aliran sungai tersebut.
Analisis Kestabilan Lereng Lowwall Pit X Di PT. Berkat Anugerah Sejahtera (BAS): Kestabilan Lereng Lowwall -, lisa haryani; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.1411

Abstract

This research aims to determine the optimal value of the mine Lowwall wall safety factor and analyze the slope stability of the mine Lowwall wall. The data used in this research are slope geometry data, physical properties, rock mechanics, and geotechnical drilling data. Safety factor analysis used GLE/Morgenstern-Price method and it was found that the lowwall slope safety factor result was 1,191, higher than the minimum limit set, namely 1.1. The research results show that the slope is in a safe and stable condition so it is safe for mining, in accordance with applicable safety standards.
Pengaruh Tutupan Lahan Terhadap Sambaran Petir Cg (Cloud To Ground) di Wilayah Balikpapan, Kutai Kartanegara dan Penajam Paser Utara Pada Tahun 2015 – 2019 Ramadhani, Fika Desy; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.907

Abstract

The increasing number of residents in the Balikpapan, Kutai Kartanegara and North Penajam Paser areas demands the use of land for settlements, resulting in a decrease in green open land and the potential to increase lightning strikes. The purpose of this study was to determine the density of CG (Cloud to Ground) lightning strikes and the effect of land cover on CG (Cloud to Ground) lightning in the Balikpapan, Kutai Kartanegara and North Penajam Paser areas in 2015-2019. This study uses data from 2015-2019 lightning strikes obtained from BMKG Balikpapan. Furthermore, the 2015-2017 data was processed using the LD2000 software and the 2018-2019 data had begun to be processed using the NexStorm V.8.4 software, so that the lightning strike density was obtained. Land cover data for 2015-2019 was obtained from BPKH Samarinda, then analyzed to produce a land cover classification. Furthermore, it is correlated so as to produce the effect of land cover on lightning strikes. The results show that the highest lightning density in the Balikpapan area is located in South Balikpapan District in 2019 with a value of 171.04 with land cover dominated by residential areas and airports, the high lightning strikes in this area are due to tall buildings being a medium for lightning to reach the earth. . The North Penajam Paser area has the highest lightning density located in Waru sub-district in 2019 with a value of 41.31 with land cover dominated by secondary dry land forest and plantation forest areas. The Kutai Kartanegara region has the highest lightning density in the Samboja sub-district in 2019 with a value of 67.23 with land cover dominated by dry land mixed with shrubs. The high number of lightning strikes in these two areas is caused by humidity, resulting in accumulation of positive charge.
Subsurface Characterization using Electrical Resistivity Tomography (ERT) for Sponge City Planning in Nusantara Capital City (IKN), Indonesia: Karakterisasi Bawah Permukaan Menggunakan Geolistrik Resistivitas (ERT) untuk Perencanaan Kota Spons di Ibu Kota Nusantara (IKN), Indonesi Wahidah, Wahidah; Lepong, Piter; Supriyanto, Supriyanto; Djayus, Djayus; Firdaus, Muhamad Akmal; Azisyarlina, Dwi
JURNAL GEOCELEBES Vol. 9 No. 2: October 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i2.47083

Abstract

Clay shale dominates the lithology along access roads in the IKN development area. Its impermeable nature poses challenges to implementing the Sponge City concept, which relies on enhanced rainwater absorption to reduce surface runoff. This study aims to map the spatial distribution of clay shale and assess its implications for Sponge City planning. The geoelectrical resistivity method was applied at three sites, each consisting of one long section and three cross sections. Resistivity contrasts were used to delineate subsurface lithology, producing two- and three-dimensional models. The results reveal three main lithological units: topsoil, clay shale, and sandy clay. Topsoil shows heterogeneous resistivity values with thicknesses ranging from <1 m to 5 m. Clay shale exhibits resistivity values below 50 Ωm and thicknesses of <5–30 m, while sandy clay exceeds 50 Ωm with variable thicknesses up to 30 m. The thick, low-resistivity clay shale indicates poor permeability, which limits infiltration and groundwater storage. These findings suggest that the IKN area is less suitable for a natural sponge system. Therefore, stormwater management should prioritize engineered solutions such as green roofs, retention ponds, and bioretention facilities to control runoff and support sustainable urban development.
STUDY OF SOIL STRATIFICATION IN LANDSLIDE AREAS ON BANTUAS ROAD USING THE RESISTIVITY GEOELECTRIC METHOD Haryono, Arif; Supriyanto, Supriyanto; Djayus, Djayus; Mislan, Mislan; Lepong, Piter; Abbas, Asri Yana Pratama
Indonesian Physical Review Vol. 7 No. 1 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i1.297

Abstract

A landslide is a natural disaster that often occurs in the Palaran sub-district, Samarinda, East Kalimantan. This sub-district with an area of ​​221.29 km2 is considered strategic as a buffer area for the National Capital City (IKN). Construction of toll roads, ports, factories, and housing has begun to be carried out here. However, in Palaran there are still many roads damaged due to landslides, one of which is Bantuas Road. To study soil stratification on the Bantuas Road section, research has been carried out using the dipole-dipole configuration of the resistivity geoelectric method. The data acquisition process was carried out at two locations, namely at the first landslide (STA 7+150) and the second landslide (STA 9+450), with each location consisting of three lines. The data processing uses Res2Dinv software to produce a two-dimensional model. Based on the resulting model, it is known that the landslide area at STA 7+150 is at a distance of 48 to 96 meters with the slip area at a depth of around 11 to 12 meters. Meanwhile, at STA 9+450, the landslide area occurred at a distance of 48 to 80 meters with the slip area at a depth of 8 to 10 meters. The slip area in the first landslide is interpreted to have occurred at the contact area between unconsolidated material and dense sand, while in the second landslide, it occurred at the contact area between weak silty sand and dense sandy clay.
LANDSLIDE VULNERABILITY ZONE MODELING BASED ON AHP-GIS AND GEOELECTRIC METHOD VERIFICATION: AN EARLY DETECTION STRATEGY IN SEBULU DISTRICT, KUTAI KARTANEGARA REGENCY Fadillah, Rizky; Djayus, Djayus; Khoirunisa, Nanda
Elipsoida : Jurnal Geodesi dan Geomatika Vol 8, No 2 (2025): Volume 08 Issue 02 Year 2025
Publisher : Department of Geodesy Engineering, Faculty of Engineering, Diponegoro University,Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/elipsoida.2025.29468

Abstract

Landslides and soil movement frequently occur in Sebulu District, especially on the main access road. This study aims to analyze the vulnerability to landslides in Sebulu District, Kutai Kartanegara Regency, using the Analytical Hierarchy Process (AHP) and Geographic Information System (GIS) approaches, with verification through the geoelectric method. The advantage of this integrated approach is its ability to combine multi-criteria spatial modeling with physical validation of subsurface conditions, thereby producing a more comprehensive and reliable analysis. The secondary data used includes geological information, rainfall, slope gradient, soil type, and land cover. By applying AHP weighting, landslide vulnerability values were obtained with "low," "medium," and "high" categories, covering areas of 230.31 ha, 301.99 ha, and 309.30 ha, respectively. Verification using the geoelectric method identified a weak zone with a thickness of 1–5 meters, which could trigger soil movement towards the southwest. These results provide a clearer understanding of landslide-prone areas, which can serve as the basis for early detection strategies in disaster mitigation.Keywords: susceptibility zones, landslide, geographic information system, AHP, geoelectric resistivity.
Co-Authors -, lisa haryani Abbas, Asri Yana Pratama Adrianus Inu Natalisanto Agfanny, Ferruzi Ansyah, Habri Antony, Nurvani Arrosyidah, Mosy R azisyarlina, Dwi Batrisyia, Nisa Bulo, Deni Datu, Bonaria Devi, Honey Puspa Ernia, Yuyun Fadillah, Rizky Firdaus, Muhamad Akmal Haryono, Arif Hasmah, Siti Hendrawanto, Benny Hutabarat, Melisa Julianti, Sri Rezeki Kadek Subagiada, Kadek Khasanah, Ulfiatul Kusmardiyanti, Retni Lepong, Piter Linda, Fitria Nova MARIA BINTANG Maulana, Risky Mislan Munir, Rahmiati Nanda Khoirunisa pangge, claudius eswinsky Rahmiati Rahmiati Ramadhan, Adi Buchori Ramadhani, Fika Desy Rusmilawati, Depi Sadewo, Wisnu Saputra, Ary Rhamadan Sari, Bella Dessy Wulan Situmeang, Edberg Sri Wahyuni Sunarti Supriyanto Supriyanto Suryadi . Wahidah Wahidah Wibowo, Nobella Hadi Yanti, Derli Yanti, Nurma Yuliana Yuliana Yusuf, Mustaid