Article Per Year (5 Year)
p-Index From 2021 - 2026
4.405
P-Index
This Author published in this journals
All Journal Jurnal IPTEK Jurnal Penelitian Sains PROMINE Buletin Sumber Daya Geologi Jurnal Geosains dan Teknologi Jambura Geoscience Review Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Journal of Earth and Marine Technology (JEMT) BIOVALENTIA: Biological Research Journal MINERAL Journal of Geology Sriwijaya
Harnani Harnani
Jurusan Teknik Geologi, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Transportation

Published : 29 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 29 Documents
Search

 1   2   3 
GIS-Based Landslide Susceptibility Mapping Using Weighted Overlay in Ogan Komering Ulu Juliansyah, Ilham Rahmat; Harnani, Harnani; Nurohim, Dede
Jambura Geoscience Review Vol 8, No 1 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i1.36391

Abstract

Landslides pose a major hazard in Ogan Komering Ulu Regency, South Sumatra, where rugged relief, high rainfall, and land-use change can reduce slope stability. This study develops a GIS-based landslide susceptibility map using the weighted overlay method to support disaster mitigation and spatial planning. Five conditioning factors—slope, rainfall, geology, soil type, and land use—were prepared as thematic layers from DEMNAS topography, CHIRPS rainfall estimates interpolated using Inverse Distance Weighting, geological shapefiles from Ina-Geoportal, soil information from the FAO–UNESCO Digital Soil Map of the World, and land-cover data from the Indonesian Base Map (RBI). Each factor was reclassified into susceptibility classes, assigned scores, and weighted according to its relative influence on landslide occurrence, then integrated through overlay analysis to produce a composite susceptibility index. The index was classified into low, moderate, and high susceptibility zones. The results indicate that moderate susceptibility dominates most of the study area, while high-susceptibility zones are concentrated in hilly to mountainous terrains with steep slopes and unfavorable geological and soil conditions. Model performance, evaluated using a landslide inventory and the Receiver Operating Characteristic curve, produced an Area Under the Curve value of 0.715, indicating moderate predictive accuracy. The susceptibility map provides actionable spatial information to prioritize monitoring and guide land-use management in Ogan Komering Ulu.
Studi Geomorfologi Daerah Kedungpoh dan Sekitarnya, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta Lestari, Suci Febria; Harnani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1669

Abstract

The Kedungpoh area and its surroundings in Gunung Kidul Regency, Yogyakarta, are part of the Wonosari Basin, which exhibits complex geomorphological characteristics resulting from the interaction of lithology, geological structures, and exogenic processes. This study aims to identify landform units and analyze the geomorphic processes that contribute to the development of geomorphology in the study area. The methods employed include morphological, morphometric, and morphogenetic analyses through the interpretation of topographic maps, DEM data, and direct field observations. The results indicate that the analyzed area can be classified into seven main geomorphic units: Low Denudational Hills with Moderate Erosion, Denudational Hills with High Erosion, High Denudational Hills with High Erosion, Fault Zone Hills with High Erosion, Floodplain, Irregular Meandering Channel, and Lapilli Plain. The morphology of the study area is controlled by variations in Tertiary lithology, the development of major fault structures such as the Pilangrejo Fault and the Pengkol Fault, as well as intensive fluvial and denudational processes. The dominant geomorphic processes include denudation, fluvial activity, and volcanic deposition, with erosion intensity ranging from moderate to high. These findings provide insight into the dynamics of landform development in the Kedungpoh area, which are controlled by the interaction of geological structures, lithology, and ongoing geomorphic processes.
Evaluasi Daya Dukung Tanah Formasi Kasai untuk Zonasi Ketahanan Geoheritage Danau Rayo, Musi Rawas Utara, Sumatera Selatan Setiawan, Budhi; Az Zahra, Salsabila; Harnani, Harnani
Jurnal Geosains dan Teknologi Vol 9, No 1 (2026)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jgt.9.1.2026.68-78

Abstract

Danau Rayo di Kabupaten Musi Rawas Utara, Sumatera Selatan, merupakan situs geoheritage dengan karakteristik geologi yang kompleks dan diduga terbentuk akibat proses tumbukan meteorit purba. Keterbatasan informasi mengenai kondisi geoteknik dan tingkat daya dukung tanah di kawasan ini menjadi kendala dalam penyusunan zonasi konservasi dan pengelolaan kawasan berbasis ilmiah. Penelitian ini bertujuan untuk mengevaluasi karakteristik geoteknik Formasi Kasai sebagai dasar penentuan zonasi ketahanan geoheritage Danau Rayo. Analisis dilakukan melalui pengujian sifat fisik dan mekanik tanah untuk memperoleh nilai daya dukung tanah (qa) sebagai indikator kestabilan geologi. Hasil penelitian menunjukkan bahwa kawasan Danau Rayo terbagi ke dalam dua zona utama, yaitu zona basin dengan nilai qa < 100 kN/m² yang mencerminkan tingkat ketahanan geoteknik rendah dan dikaitkan dengan material yang bersifat lepas serta belum terkonsolidasi secara optimal, serta zona rim dengan nilai qa > 100 kN/m² yang menunjukkan tingkat ketahanan tinggi karena tersusun atas material yang lebih kompak dan stabil. Berdasarkan hasil tersebut, zona basin direkomendasikan sebagai zona konservasi inti, sedangkan zona rim dinilai lebih sesuai untuk pengembangan geowisata berbasis konservasi. Studi ini menegaskan bahwa parameter daya dukung tanah dapat dimanfaatkan sebagai dasar ilmiah dalam penentuan zonasi konservasi dan pengelolaan geoheritage berbasis kestabilan tanah melalui pendekatan geoteknik dan spasial.
Analisis Hubungan Kadar Air terhadap Kuat Tekan Bebas Tanah di Daerah Danau Rayo, Kabupaten Musi Rawas Utara, Sumatera Selatan Salsabila Az Zahra; Harnani, Harnani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 4 (2025): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i4.1482

Abstract

Daerah penelitian terletak di Danau Rayo yang memiliki tujuan untuk dapat mengetahui bagaimana kadar air berpengaruh terhadap nilai kuat tekan bebas (Qu). Pengujian dilakukan terhadap tujuh sampel tanah yang diambil secara undisturbed menggunakan bor tangan di lokasi penelitian. Setiap sampel diuji untuk menentukan kadar air alami dan nilai kuat tekan bebasnya di laboratorium. Data hasil pengujian kemudian dianalisis menggunakan regresi linier sederhana untuk melihat hubungan antara kadar air dan kuat tekan bebas. Hasil analisis menunjukkan persamaan regresi y=-0,8694x + 63,944 dengan nilai koefisien determinasi R2=0,3642, yang mengindikasikan bahwa kadar air berpengaruh sebesar 36,42% terhadap variasi kuat tekan bebas tanah. Nilai koefisien regresi negatif mengindikasikan bahwa tiap kenaikan persentase kadar air, nilai kuat tekan bebas cenderung mengalami penurunan. Hal tersebut dipengaruhi oleh meningkatnya kandungan air dalam pori-pori tanah yang mengurangi gaya kohesi antar partikel. Secara keseluruhan, hasil penelitian ini menunjukkan bahwa kadar air merupakan faktor kunci yang berperan penting dalam menentukan kekuatan tanah. Perubahan kadar air dapat secara signifikan memengaruhi perilaku mekanik tanah, khususnya terhadap nilai kuat tekan bebas (Qu). Oleh karena itu, pengendalian dan pemantauan kadar air perlu diperhatikan dalam analisis kestabilan tanah serta dalam perencanaan dan pelaksanaan konstruksi, guna memastikan keamanan dan kestabilan struktur yang dibangun di atasnya.
Penilaian Kelayakan Air Sebagai Sumber Air Bersih dan Air Minum Berdasarkan Water Quality Index (WQI) Al Ghaitsi, Titra Hayyu; Harnani, Harnani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 4 (2025): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i4.1484

Abstract

Water is an important resource for human life and activities. The decline in water quality due to domestic activities, agriculture, and the existence of landfills has become an environmental problem that need serious attention. This study aims to assess water quality in Palemraya Village, Ogan ilir Regency, using the Water Quality Index (WQI) method with a Weighted Arithmetic Index approach. Samples were taken at four points representing surface water and groundwater sources. Physical, chemical, and biological parameters were tested in the laboratory in accordance with Permenkes No. 2 of 2023 standards. The results showed that the WQI values ranged from 8,96 to 83,11. Location S1, which is close to the landfill, had very poor water quality, while location P2 showed good water quality that could still be used after simple treatment. The main factors causing the decline in water quality were low pH and microbiological contamination due to domestic activities and leachate seepage. This study is expected to serve as a basis for efforts to manage sustainable clean water sources for the local community
Analisis Elektrofasies Berdasarkan Data Well Logging pada Seam Batubara A1–D di Pit N, Tanjung Enim, Sumatera Selatan Rafi, Muhammmad Rafi Al Hawari; Harnani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1741

Abstract

The equitable distribution of educational facilities is a crucial aspect of supporting sustainable regional development, particularly at the senior high school level as part of the secondary education system. Inequality in school distribution may affect accessibility and equal educational opportunities across regions. This study aims to analyze the spatial distribution patterns and service coverage of senior high school facilities in Kabupaten Magetan. The research employs a quantitative approach using Geographic Information System (GIS)-based spatial analysis. Analytical techniques include mapping school distribution, applying the Average Nearest Neighbor (ANN) analysis to identify distribution patterns, and conducting buffer analysis to evaluate service accessibility to residential areas. The results indicate that educational facilities tend to form clustered patterns in areas with higher accessibility levels. Service coverage analysis also reveals disparities in accessibility among regions, where central areas demonstrate better service coverage compared to peripheral zones. These findings suggest that the equitable distribution of educational facilities still requires optimization in spatial planning to enhance educational access equity and support sustainable regional development.
Analisis Tingkat Kerawanan Banjir Menggunakan Metode Weighted Overlay Berbasis Sistem Informasi Geografis (SIG) di Kecamatan Ulu Ogan Kabupaten Ogan Komering Ulu Putri, Adisty Merisya; Harnani; Febrim, Dwi Vina
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1758

Abstract

Flooding in the Ulu Ogan Subdistrict, Ogan Komering Ulu Regency, is generally triggered by high rainfall that causes the rivers in Ulu Ogan to overflow. This study aims to analyze the level of flood vulnerability in Ulu Ogan Subdistrict, Ogan Komering Ulu Regency, by utilizing a Geographic Information System (GIS) based on overlay and scoring methods. The overlay method is used to combine various relevant spatial data layers, such as slope gradient, land use, soil type, rainfall, and distance to rivers. Each parameter is assigned a weight and score based on its level of contribution to flood potential, and then integrated to produce a flood vulnerability zoning map. The research area in Ulu Ogan Subdistrict, Ogan Komering Ulu Regency, is dominated by a high level of flood vulnerability. The high vulnerability zone covers approximately 16,987.59 ha (70.19%), the moderate vulnerability zone covers 6,691.86 ha (27.65%), and the low vulnerability zone covers 522.9 ha (2.16%).
Micropaleontological Analysis of Planktonic and Benthic Foraminifera from the Claystone Member of the Bayah Formation (Tebm) and the Limestone Member of the Cijengkol Formation (Tojl), Jatake Area, Lebak Regency, Banten Province Ahmad, Salsabiila Fadhilah; Febrim, Dwi Vina; Harnani, Harnani
Journal of Earth and Marine Technology (JEMT) Vol 6, No 1 (2025)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2025.v6i1.8822

Abstract

Micropaleontological analysis of planktonic and benthic foraminifera from three rock samples—muddy micrite, allochemic sandstone, and wackestone—was carried out to determine the relative age and depositional environment of the Claystone Member of the Bayah Formation (Tebm) and the Limestone Member of the Cijengkol Formation (Tojl) in the Jatake area, Lebak Regency, Banten Province, Indonesia. A total of 43 foraminiferal specimens were identified, including 28 planktonic and 15 benthic individuals. These were used for biostratigraphic and paleoenvironmental interpretation. The results show that the Claystone Member Tebm (RL19) dates to the Middle Eocene, mainly within planktonic foraminiferal biozones P14–P15, which falls under a wider P14–P17 range. In contrast, the Limestone Member Tojl is younger, with sample RL85 assigned to the Late Oligocene (N1–N3) and sample RL23 corresponding to the Late Oligocene to earliest Miocene interval (N3–N4). Benthic foraminiferal groups from all samples suggest deposition in outer neritic to upper bathyal environments. The estimated paleobathymetric ranges are about 390–1100 ft for RL19, 350 - 1630 ft for RL85, and 390 - 1230 ft for RL23. Even though the ages differ, the similarity in depositional environments hints at comparable marine bathymetric conditions in the study area. The differences in age suggest that the Bayah Formation and the Cijengkol Formation represent different depositional phases instead of a continuous stratigraphic sequence. This finding offers important insights into the stratigraphic framework and depositional evolution of the Bayah Dome region.
Karakteristik Petrografi dan Klasifikasi Satuan Batuan di Daerah Citorek, Kabupaten Lebak, Banten Zhafirah, Astrid; Febrim, Dwi Vina; Harnani, Harnani
Jurnal Penelitian Sains Vol 28, No 1 (2026)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v28i1.1351

Abstract

Daerah Citorek, Kabupaten Lebak, Provinsi Banten, tersusun oleh satuan batuan berumur Eosen Akhir hingga Miosen Awal yang memperlihatkan variasi litologi vulkani klastik, karbonat, dan vulkanik. Penelitian ini bertujuan untuk mendeskripsikan karakteristik petrografi serta menentukan klasifikasi batuan berdasarkan analisis sayatan tipis pada masing - masing satuan stratigrafi. Metode yang digunakan meliputi pemetaan geologi skala 1:25.000, pengambilan sampel representatif, preparasi sayatan tipis, serta penga matan mikroskopis menggunakan mikroskop polarisasi pada kondisi Plane Polarized Light (PPL) dan Cross Polarized Light (XPL). Penentuan klasifikasi mengacu pada Pettijohn (1975) untuk batuan klastik, Dunham (1962) dan Embry & Klovan (1971) untuk karbonat, serta klasifikasi IUGS (1989) untuk batuan beku. Hasil analisis menunjukkan bahwa satuan Eosen Akhir Formasi Cikotok (Temv) didominasi fragmen kaca vulkanik ±70-80% dengan tekstur matrix supported dan sortasi buruk, sehingga diklasifikasikan sebagai vitric tuff. Satuan Oligosen Awal - Akhir anggota napal Formasi Cijengkol (Tojm) tersusun atas ma terial lempung dominan yang termasuk mudrock. Anggota batugamping Formasi Cijengkol (Tojl) menunjukkan tekstur floatstone dengan kandungan bioklas ±40-50%. Sementara itu, satuan Miosen Awal Formasi Cimapag (Tmc) memperlihatkan tekstur porfiritik dengan dominasi plagioklas dan diklasifikasikan sebagai lava andesit.
Co-Authors Abiyyu, Muhammad Dimas Al Abiyyu, Rayhan Khairunnan Ahmad, Salsabiila Fadhilah Al Ghaitsi, Titra Hayyu Ananda, Ricky Annafin , Faiz Hady Aulia, Zhahra Az Zahra, Salsabila Budhi Setiawan Budhi Setiawan Dieny Dezilia Dimas Indra Arifianto Edy Sutriyono Elisabet Dwi Mayasari Febrim, Dwi Vina Ferdian Syahputra Gumanti, Johnnedy Gunawan, M. F. Hafizh Fikra Ramadhan Idarwati Idarwati Juliansyah, Ilham Rahmat Khoiri, Muhammad Faris Lestari, Suci Febria Mochammad Malik Ibrahim Muhammad Sidiq Nurohim, Dede Nyana M, Newche Brighita Pebby Putra Juenda Prihandayani, Anggun Putri Savira Putri, Adisty Merisya Putricia, Innaka Qistan, Muhammad Hafits Rafi, Muhammmad Rafi Al Hawari Sabila, Dona Salni Salsabila Az Zahra Stevanus Nalendra Jati Thallalefa, Muhammad Daffa Utamaputra, Radian Gatra Yogie Zulkurnia Rochmana Zhafirah, Astrid