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ANALISIS KLASIFIKASI LAJU EROSI MENGGUNAKAN METODE UNIVERSAL SOIL LOSS EQUATION (USLE) DENGAN SIG DI KOTA SAMARINDA Wisnu Sadewo; Kadek Subagiada; Djayus Djayus
JURNAL GEOSAINS KUTAI BASIN Vol 6 No 1 (2023)
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.v6i1.1011

Abstract

Peningkatan jumlah penduduk akan membuat kebutuhan akan sumber daya dan lahan akan semakin meningkat. Pemanfaatan sumber daya alam dan pembukaan lahan yang berlebih akan menimbulkan berbagai permasalahan, salah satu permasalahanya adalah erosi. Penelitian ini dilakukan untuk mengetahui klasifikasi lajur erosi di Kota Samarinda serta mengetahui sebaran erosi dengan kategori sangat berat di Kota Samarinda. Perhitungan laju erosi didasarkan pada empat faktor yaitu, faktor erosivitas curah hujan (R) dihitung dari intepretasi data curah hujan, faktor erodibilitas tanah (K) ditentukan dari analisis peta jenis tanah, faktor kelerengan (LS) ditentukan dari analisis data DEM (Digital Elevation Model), faktor vegetasi dan tutupan lahan (CP) ditentukan dari peta tutupan lahan. Berdasarkan empat fakor tersebut selanjutnya dihitung klasifikasi laju erosi dengan menggunakan metode Universal Soil Loss Equation (USLE). Hasil penelitian menunjukkan hasil klasifikasi laju erosi di Kota Samarinda menunjukkan 46,23 % dari luas wilayah tergolong sangat ringan ( <15 ton/ha/th); 8,37 % tergolong kelas ringan (15-60 ton/ha/th); 7,76 % tergolong kelas sedang (60-180 ton/ha/th); 18,94 % tegolong berat (180-480 ton/ha/th), dan 18,70 % wilayah yang tergolong pada kelas erosi sangat berat ( >480 ton/ha/th). Luas sebaran erosi di Kota Samarinda dengan kategori sangat berat yaitu 480 ton/ha/th memiliki luas sebesar 12442,37 Ha atau setara dengan 18,70 % luas wilayah Kota Samarinda, hal ini disebabkan pada wilayah tersebut kondisi lahan sudah terbuka tanpa penutup diatasnya yang menyebabkan tanah akan mudah tererosi karena tidak adanya faktor yang menghambat laju erosi
The Identifikasi Delineasi Oli Berdasarkan Nilai Resistivitas Menggunakan Metode Geolistrik Di Area “X” Tana Tidung, Kalimantan Utara Nobella Hadi Wibowo; Djayus Djayus; Supriyanto Supriyanto
JURNAL GEOSAINS KUTAI BASIN Vol 6 No 1 (2023)
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.v6i1.1043

Abstract

Waste pollution is a problem that must be addressed immediately. Apart from affecting the air and waters, sewage pollution can also seep below the ground surface. One of the causes of waste pollution in area "X" is the leakage of the oil storage tank by the PLTD (Diesel Power Plant) operational system in that area. This leak causes oil droplets to be absorbed into the pores of the soil and into the subsurface where it settles. To find out whether remnants of oil seepage remained in area "X" a study was conducted using the resistivity geoelectric method. The research was carried out in 2 ways, namely processing in 2 and 3 dimensions and using coring samples as a comparison of resistivity values. There were 6 coring sampling points (interval variation of 7 parts of depth) used in the study, namely coring A, B, C, D, E and F. From the six samples, an average resistivity value of 2.637 Ωm is obtained at a depth of 0-30 cm . Furthermore, at a depth of 100-130 cm it has an average resistivity value of 2.702 Ωm, at a depth of 200-230 cm it has an average resistivity value of 3.510 Ωm, at a depth of 300-330 cm it has an average resistivity value of 1.862, at a depth of 400- 430 cm has an average resistivity value of 1.928 Ωm, at a depth of 500-530 cm has an average resistivity value of 1.610 Ωm and at a depth of 600-630 cm has an average resistivity value of 1.637 Ωm. The results of this study indicate that soil contaminated with waste oil has a lower resistivity, which is in the range of 2.30 Ωm to 3.76 Ωm.
Studi Pengaruh Suhu Permukaan Laut Di Selat Makassar Terhadap Intensitas Curah Hujan Kota Balikpapan Retni Kusmardiyanti; Mustaid Yusuf; Djayus Djayus; Rahmiati Rahmiati
JURNAL GEOSAINS KUTAI BASIN Vol 5 No 2 (2022)
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.v5i2.794

Abstract

Rainfall is the amount of water that falls on the ground surface during a certain period measured in units of height and is caused by various factors, such as sea surface temperature, wind direction and speed, humidity and so on. This study aims to determine how the influence of the sea surface temperature of the Makassar Strait on the intensity of rainfall in the city of Balikpapan. The data used in this study are sea surface temperatures taken at 4 coordinate points in the Makassar Strait, they are -2oS and 118oE, -1oS and 118.25oE, ​​0oEQ and 118.5oE, ​​1oN and 119.25oE and 2oN and 119.5oE and rainfall data in Balikpapan City. taken at 4 points of data collection stations, they are -1.16oS and 116.84oE, -1.16oS and 116.88oE, -1.2oS and 116.84oE and -1.2oS and 116.88oE. The data was taken for 3 years, from 2017 to 2019. This study uses a correlation analysis, where the results obtained indicate that the sea surface temperature in the Makassar Strait quite affects rainfall in the city of Balikpapan. The highest correlation is 0.601217435, which is a strong correlation and has a positive value. Keywords : Rainfall, Sea Surface Temperature, Correlation Analysis
ESTIMASI SEBARAN KUALITAS BATUBARA (ASH CONTENT) MENGGUNAKAN METODE INVERS DISTANCE WEIGHTED (IDW) DAN ORDINARY KRIGING (OK) DI PT. KAYAN PUTRA UTAMA COAL SITE SEPARI, KALIMANTAN TIMUR Sri Wahyuni; Supriyanto Supriyanto; Djayus Djayus
JURNAL GEOSAINS KUTAI BASIN Vol 2 No 1 (2019)
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.v2i1.330

Abstract

Nilai kadar abu batubara dapat diketahui dari hasil pengujian laboratorium dan atau dilakukan melalui estimasi menggunakan teknik interpolasi Invers Distance Weighted dan Ordinary Kriging. Penelitian ini dilakukan dengan membuat simulasi berdasarkan model blok distribusi kadar abu dan nilai ketebalan yang dihasilkan dari interpolasi Invers Distance Weighted dan Ordinary Kriging. Keakuratan hasil dari proses estimasi kedua metode dievaluasi berdasarkan Root Mean Square Error (RMSE). Metode Ordinary Kriging RMSE lebih kecil dari pada RMSE Metode Invers Distance Weighted. Berdasarkan estimasi RMSE tentang nilai Kadar Abu dan ketebalan Batubara metode Ordinary Kriging di PT. Kayan Putra Utama Coal Site Separi di Formasi Balikpapan lebih akurat.
ANALISIS LINGKUNGAN PENGENDAPAN BERDASARKAN DATA WELL LOGGING DAN UJI LABORATORIUM PT. BORNEO EMAS HITAM DI TENGGARONG KALIMANTAN TIMUR Honey Puspa Devi; Djayus Djayus; Supriyanto Supriyanto
JURNAL GEOSAINS KUTAI BASIN Vol 3 No 1 (2020)
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.v3i1.600

Abstract

Informasi lingkungan pengendapan merupakan bagian yang penting dalam eksplorasi batubara. Tujuan dari penelitian ini yaitu untuk mengetahui lingkungan pengendapan berdasarkan defleksi kurva dari data well logging dan uji laboratorium. Penelitian ini dilakukan di PT. Borneo Emas Hitam yang berada di Tenggarong dengan menggunakan data sekunder well logging dan uji laboratorium coring batubara. Hasil penelitian menunjukkan defleksi kurva pada daerah penelitian didominasi oleh bentuk defleksi symmetrical yang dimana bentuk defleksi ini menunjukkan lingkungan pengendapan upper delta plain.
Analisis Kecepatan Tanah Maksimum di Daerah Akibat Gempa Bumi Lombok di Daerah Pengamatan Labuan Bajo, Waingapu dan Maumere Nusa Tenggara Timur 05 Agustus Tahun 2018 claudius eswinsky pangge; Kadek Subagiada; Djayus Djayus
JURNAL GEOSAINS KUTAI BASIN Vol 5 No 1 (2022)
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.v5i1.730

Abstract

The ground motion velocity of an earthquake can cause material damage and loss. The purpose of this study was to analyze the maximum ground motion velocity caused by an earthquake. The data used were secondary data for earthquakes that occurred in the Lombok area of ​​West Nusa Tenggara on August 5 2018 at 06:46:37 p.m indonesian middle time zone, with the observation areas of Labuan Bajo (East Nusa Tenggara), Waingapu (East Nusa Tenggara), and Maumere (Nusa Tenggara). East Southeast). The data of this research include the coordinates of the earthquake area, the coordinates of the observation stations, the magnitude of the earthquake, and the acceleration value of ground motion as a comparison. Those data furthermore calculated the epicenter distance, the earthquake intensity value, and the ground motion velocity value was analyzed then compared with the ground acceleration value after which it was connected to the MMI scale. The results showed that the ground velocity value of the Labuan Bajo observation area was 3.66 cm / s, Waingapu 0.99 cm / s and the Maumere area 0.98 cm / s with a damage effect according to the MMI category II scale.
INTERPRETASI KECEPATAN GELOMBANG SEISMIK REFRAKSI TOMOGRAFI DALAM PENENTUAN LITOLOGI BAWAH PERMUKAAN DI DESA BHUANA JAYA (STUDI KASUS : PT. KHOTAI MAKMUR INSAN ABADI) Fitria Nova Linda; Piter Lepong; Djayus Djayus
JURNAL GEOSAINS KUTAI BASIN Vol 2 No 2 (2019)
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.v2i2.473

Abstract

Research has been carried out to determine the subsurface lithology including rock type, rock layer thickness, weathered layer, and rock hardness level based on wave velocity seismic refraction tomography at Bhuana Jaya Village, PT. Khotai Makmur Insan Abadi by using the seismic refraction method. The measurement in this study uses the In Line technique, where geophone equipment is arranged in a straight line with 3 and 5 meters spacing between the geophone. Based on the results of study, there are two types of morphology namely hill and rice field areas. Hill area is interpreted which have lithology, the first layer has a thickness of less than 3 m with lithology in the form is soil as a weathered layer, the second layer has a thickness of less than 2 m with lithology in the form is siltstone, the third layer has a thickness is less than 9 m with lithology in the form is mudstone, and the fourth layer has a thickness of less than 9 m with lithology in the form is sandstone, where this area is located at very hard rock. While rice field areas are interpreted which have lithology, the first layer has a thickness of less than 10 m with lithology in the form is alluvium as a weathered layer and the second layer has a thickness of less than 10 m with lithology in the form is siltstone with sandstone inserts, where these areas are located at an easy to medium level of hardness.
TREN SAMBARAN PETIR CLOUD TO GROUND KOTA BALIKPAPAN TAHUN 2016-2018 Ferruzi Agfanny; Djayus Djayus; Supriyanto Supriyanto
JURNAL GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
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.v3i2.693

Abstract

Lightning strikes are very dangerous natural events and can cause significant damage such as fires. Apart from causing lightning strikes, damage can also result in death if contact with living things. Because it is very dangerous, it is necessary to have a reference regarding the level of threat of lightning strikes that occur in the study area. The purpose of this research is to determine the level of lightning threat in the city of Balikpapan in the period 2016 to 2018, to determine the trend or trend of lightning strikes each year. The 2016-2018 lightning strike data obtained from the NexStrom software and Lighting Detector 2000 is a type of Cloud to Ground lightning that is struck directly to the ground and is a lightning hazard for life, then this lightning strike data is processed to find the value of the level of lightning strikes. which occurred in the city of Balikpapan in 2016- 2018. The results of this study found that the average threat level of Balikpapan City lightning strikes and the value of the threat of lightning strikes in 2016-2018.
Identifikasi Sebaran Batu Bara dari Data Well Logging Menggunakan Metode Cross Section (Studi Kasus di PT. Khotai Makmur Insan Abadi, Kalimantan Timur) Melisa Hutabarat; Djayus Djayus; Suprianto Suprianto
JURNAL GEOSAINS KUTAI BASIN Vol 4 No 2 (2021)
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.v4i2.792

Abstract

Eksplorasi merupakan langkah awal dalam tahapan pertambangan yang perlu dilakukan dalam memenuhi kebutuhan konsumen. Tujuan penelitian ini untuk mengetahui sebaran batu bara berdasarkan masing-masing data log dan volume secara menyeluruh menggunakan metode cross section. Penelitian ini menggunakan data sekunder yang meliputi data titik koordinat, data bore hole, data Log Gamma dan Log Resitivtas. Data Bore hole dianalisis sehingga diketahui kedalaman dan ketebalan batu bara. Selanjutnya ditampilkan sebaran batu bara secara menyeluruh 3D menggunakan project Cross Section dan menghitung volume batu bara. Hasil penelitian menunjukkan sebaran seam batu bara yang paling sedikit yaitu 1 seam terdapat pada log KK08 dengan ketebalan rata-rata 0,665 m dan sebaran seam batu bara yang paling banyak yaitu 5 seam terdapat pada log KK02, dengan ketebalan rata-rata 1,004 m. Ketebalan seam batu bara yang paling tebal yaitu, seam 7 dan ketebalan seam batu bara yang tipis yaitu, seam 4. Hasil project Cross Section pada lima penampang didapatkan kemiringan seam batu bara yang relatif ke arah Barat dimana jurus lapisan batu bara berkisar antara N 190oE – N 200oE dengan dip berkisar antara 6o hingga 10o. Total volume 52.209.563 m3 dengan Tonase sumber daya tertujuk batu bara yaitu 67.872.432 ton/m3.
Studi Penentuan Percepatan (Acceleration) Tanah Daerah Ampana, Balikpapapan, Bone, Bulukumba, Bau-Bau Akibat Gempabumi Donggala 28 September 2018 Habri Ansyah; Djayus Djayus; Supriyanto Supriyanto
JURNAL GEOSAINS KUTAI BASIN Vol 4 No 1 (2021)
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.v4i1.611

Abstract

Ground acceleration that was caused by an earthquake can cause damage both physical and material. The research aims to determine the value of ground acceleration and the effects caused by earthquake. The data used was secondary earthquake data occurred at Donggala on September 28 th, 2018 at 17:02:45 WIB, with the observation area Ampana (central Sulawesi), Bau-Bau (South East Sulawesi), Bulukumba (South Sulawesi), Bone (South Sulawesi), and Balikpapan (Balikpapan). Research data including epicenter coordinates data, coordinates of observation area and the depth of earthquake. From this data are further calculated epicenter distance and hypocenter distance. Ground acceleration value was analyzed by using the method M. V Mickey, Esteva, Mc. Guirre RK, Donovan, Oliviera and Guttenberg then connected with MMI scale. The results showed thatthe ground acceleration value of Ampana, Balikpapan and Bone was between 0.0004 g – 0.0730 g with damage effects I-V according to MMI scale. For Bulukumba and Bau-Bau was between 0.0003 g– 0.0220 g with damage effects I-IV according to MMI Scale.
Co-Authors Adi Buchori Ramadhan Adrianus Inu Natalisanto Adrianus Inu Natalisanto Ary Rhamadan Saputra Bella Dessy Wulan Sari Benny Hendrawanto Bonaria Datu claudius eswinsky pangge Deni Bulo Depi Rusmilawati Derli Yanti Edberg Situmeang Ferruzi Agfanny Fitria Nova Linda Habri Ansyah Honey Puspa Devi Kadek Subagiada Kadek Subagiada Laksono Trisnantoro Melisa Hutabarat Mustaid Yusuf Nisa Batrisyia Nobella Hadi Wibowo Nurma Yanti Nurvani Antony Piter Lepong Rahmiati Munir Retni Kusmardiyanti Risky Maulana Sri Rezeki Julianti Sri Wahyuni Sunarti Sunarti Suprianto Suprianto Suprianto Suprianto Supriyanto Supriyanto Suryadi . Ulfiatul Khasanah Wahidah Wahidah Wisnu Sadewo Yuliana Yuliana Yuyun Ernia