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Rahmiati
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Jalan Barong Tongkok No.4 Gunung Kelua Samarinda, East Kalimantan Province Indonesia - 75123
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Kota samarinda,
Kalimantan timur
INDONESIA
Geosains Kutai Basin
Published by Universitas Mulawarman
ISSN : -     EISSN : 26155176     DOI : https://doi.org/10.30872/geofisunmul.v5i2
Core Subject : Science,
Earth & Planetary Sciences
Coastal and Ocean Dynamics Environmental of Geophysics Geodesy and Geography Geographic Information System Geology Geophysics Exploration Geotechnical/ geo-engineering Hazard Mitigation Hydrology Meteorology and Climatology Mining Engineering Seismology and Volcanology Oceanography
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika
Articles 108 Documents
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HUBUNGAN TINGGI MUKA AIR DAN DEBIT ALIRAN SUNGAI KARANG MUMUS DI LOKASI DESA PAMPANG KOTA SAMARINDA Wiadnyana, Dewa Made; Subagiada, Kadek; Natalisanto, Adrianus Inu
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.v2i2.469

Abstract

Karang Mumus River Pampang Village Samarinda City has a postal system in accordance with what is needed to overcome or overcome problems related to the environment. This research was carried out around the Pampang River in Samarinda City which was at coordinates 117 ° 06 '44 .00 "BT, 00 ° 27 '36.00" LS - 117 ° 07 '11 .00 "BT, 00 ° 27' 18.00" LS. In this graph measurements are taken to obtain a Rating Curve ( ) and water level (TMA) of 51 data. These values ​​are processed with the help of Microsoft Excel program to get the graphic model. Furthermore, the modeling results are published to get an average value. The results of the study show that the graph in the polynomial shows the best value. Obtained from the results of the modeling of sediment discharge flow that was found one point that was seen to be very increased in data 21.
Studi Penentuan Percepatan (Acceleration) Tanah Daerah Ampana, Balikpapapan, Bone, Bulukumba, Bau-Bau Akibat Gempabumi Donggala 28 September 2018 Ansyah, Habri; Djayus, Djayus; Supriyanto, Supriyanto
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.
STUDI PEMANFAATAN AIR TANAH DAN POTENSI INTRUSI AIR LAUT DI DAERAH PESISIR KOTA BALIKPAPAN Septiardi, Muhammad Evan; Mislan, Mislan; Natalisanto, Adrianus Inu
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.v2i1.334

Abstract

Research on the quality of ground water has been performed through boreholes in the city of Balikpapan to find out an indications of the potential of sea water intrusion based on data. The study began with choosing the companies as groundwater user in two places, namely the coastal of manggar and the coastal of the city of Balikpapan. The next steps were to take the drill water samples and examine the quality. The examined were salinity, TDS (Total Dissolve Solid), conductivity and pH of water. The water categories were divided into 3 ie fresh water, with salinity value <1 ppt; brackish with salinity value between 1-3 ppt; and salt water with value> 3 ppt. After those steps the data were interpreted and then contructed to be the image of salinity contour.
Interpretasi Data Magnetik Menggunakan Dekonvolusi Euler Studi Kasus: Lembah Bada Poso Sulawesi Tengah Efendi, Rustan; Fazri, M; Rusydi H, M; Kasim, Sandra
GEOSAINS KUTAI BASIN Vol. 1 No. 1 (2018)
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.v1i1.169

Abstract

Salah satu teknik interpretasi pada data magnetik adalah dekonvolusi Euler. Teknik ini relatif efektif mendeteksi struktur-struktur geologi yang tertanam. Pada studi ini telah dilakukan interpretasi data geomagnet menggunakan teknik tersebut. Tujuan penelitian ini untuk mengeksitimasi letak dan kedalaman sumber anomaly magnetic serta mengidentifikasi struktur-struktur geologi yang tertanam di daerah penelitian. Hasil interpretasi menunjukkan bahwa lokasi studi teridentifikasi struktur geologi berupa sesar, kontak dan silk. Kedalaman sumber anomaly dengan geometri berupa sesar antara 23 – 102 meter yang memanjang utara selatan dan bersesuain. Struktur geologi berupa sill menyebar di daerah penelitian dengan kedalaman antara 45 sampai 78 meter
Analisis Pengaruh Perubahan Tutupan Lahan Terhadap Suhu Permukaan Tanah di Kota Samarinda Mau, Kristin Felsiana; Subagiada, Kadek; Supriyanto, Supriyanto
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.v6i1.1045

Abstract

Perkembangan Kota Samarinda dan tingginya urbanisasi menyebabkan berkurangnya lahan bervegetasi sehingga radiasi yang diserap lebih besar dan suhu di wilayah tersebut meningkat. Tujuan penelitian ini adalah mengetahui klasifikasi tutupan lahan dan distribusi suhu permukaan tanah serta pengaruh perubahan tutupan lahan terhadap suhu permukaan tanah di kota samarinda tahun 2013 dan 2022 dengan menggunakan SIG (Sistem Informasi Geografis). Penelitian ini menggunakan data tutupan lahan yang dianalisis dan dihasilkan klasifikasi tutupan lahan serta untuk data suhu permukaan tanah diolah mengggunakan metode mono-window brightness temperature. Hasil penelitian menunjukkan bahwa perubahan tutupan lahan memiliki hubungan dengan suhu permukaan. Bertambahnya luasan lahan terbangun dan lahan terbuka, berkurangnya luasan lahan vegetasi dapat menyebabkan perubahan sifat fisik permukaan yang berimplikasi pada peningkatan suhu permukaan. suhu rata rata permukaan tanah kota samarinda mengalami kenaikan 0,9 °C selama 9 tahun ini dan untuk tutupan lahan mengalami kenaikan ada pada kelas lahan terbangun dan lahan terbuka dengan suhu tertinggi ada pada kelas lahan terbuka yaitu tahun 2013 adalah 31,1°C-32,2°C mengalami kenaikan tahun 2022 adalah 32,1°C-33°C.
Analisis Kestabilan Lereng Terhadap Getaran Tanah (Ground Vibration) Akibat Aktivitas Blasting di Pit 10 PT. Alamjaya Bara Pratama Desa Jembayan Maulana, Risky; Djayus, Djayus; Lepong, Piter
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.v3i2.679

Abstract

This research aims to find out how stable the slopes of the mine are always given ground vibration results from blasting activities. This research was done by estimating the stability of the mine's highwall slope and subsequently given the vibration results from the blasting activity for 30 days using Rocscience SLIDE 6.0 software. The results of this research indicate that the level of ground vibration is too large so that the possibility of landslides on the highwall slopes is very high. So the calculation is done to reducing the amount of ground vibration, one way is to estimate the contents of explosives at a certain distance.
SOIL MOVEMENT ANALYSIS BASED ON MAXIMUM SOIL SPEED PATTERNS DUE TO THE LOMBOK EARTHQUAKE Maulidsandy, Penta Adenata; Lepong, Piter; Mislan, Mislan
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.v5i1.780

Abstract

ABSTRACT Earthquake activity in Lombok, West Nusa Tenggara (NTB) gives rise to ground movement, this ground movement can be used to predict the intensity of the next earthquake. The purpose of this study is to determine the movement of land based on the pattern of maximum soil velocity that occurred due to the Lombok Earthquake July 29, 2018, which can be used to predict the intensity of the next earthquake. This study uses secondary earthquake data (magnitude) obtained from the USGS (United States Geological Survey). Magnitude data were analyzed using empirical formulas so that the values ​​of intensity, maximum ground velocity and contour maps were obtained. The results show that the movement of the land due to the earthquake moved very quickly towards the north, quickly towards the east, quickly towards the south and finally to the south slowly. The highest maximum ground velocity located in Obel-Obel Village with the value of 23,2 cm / s. The calculation result in the form of this maximum ground velocity can be used as a parameter to predict the upcoming earthquakes that will occur at Lombok or the other side of world.
INTERPRETASI KEBERADAAN GOA BAWAH TANAH (BUNKER) BERDASARKAN DATA GROUND PENETRATING RADAR (GPR) DI DESA JEMBAYAN, KECAMATAN LOA KULU, KABUPATEN KUTAI KARTANEGARA Ladjar, Youvenalis Di’ong; Supriyanto, Supriyanto
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.v2i2.474

Abstract

Penelitian bunker di Jembayan ini dilakukan untuk memberikan informasi tambahan dalam bidang bangunan sejarah baik bagi para arkeologi. Penelitian ini menggunakan metode Ground Penetrating Radar (GPR) untuk interpretasi keberadaan bunker berdasarkan raw data yang dihasilkan dari proses perekaman di desa Jembayan. Metode GPR bekerja berdasarkan prinsip penjalaran gelombang elektromagnetik. Hasil dari metode ini menghasilkan profil atau raw data. Hasil pengolahan data GPR diinterpretasi untuk menentukan indikasi bunker berdasarkan kontras warna amplitudo yang dihasilkan, dimana kontras warna yang dilihat adalah kontras warna amplitudo udara. Dari hasil analisis data GPR yang dilakukan menunjukan adanya indikasi bunker hanya berada pada lintasan A, B, E dan lintasan G, dengan kedalaman 0.05 meter–3.5 meter dan penyebaran titik-titik bunker berada pada lintasan A, lintasan B, lintasan E, lintasan G, dengan pola kemenerusan bunker yaitu pada arah tenggara-barat laut.
Analysis of Scale Distance Correlation to Soil Vibration in Coal Blasting Operations Julianti, Sri Rezeki; Djayus, Djayus; Lepong, Piter
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.v4i1.740

Abstract

The optimum vibrations generated from the delay, distance, and explosive settings on the destruction of the ground cover or OB can accumulate the effect of the damage. Research was purposed to view the process of coal blasting and the impact of distance and explosives the detonation process. The data used in the research is a secondary force of distance, explosives, drilling patterm (7 m burden and 8 m distance ) and blasting pattern (Staggered patten/Zig-zag).Data are prepared using Microsoft Excel by inserting distance and explosives materials and for PPV value. PPV value is compared with the distance value (scaled distance). The result of research shows the process of blasting using a zig-zag system with distance between 7m and spacing 8m, depth of 3m - 14m. Explosived material content (ANFO) with averaged 101.74. The impact of the distance and the explosives materials from PPV calculations is not very significantly indicated by the PPV value of 3,62mm/s.
INTERPRETASI BAWAH PERMUKAAN MENGGUNAKAN METODE GPR (GROUND PENETRATING RADAR) DI AMBLESAN JALAN RING ROAD II KOTA SAMARINDA Putro, Ari Anggono; Supriyanto, Supriyanto; Rinaldi, Aditya
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.v2i1.399

Abstract

This research has been conducted using the Ground Penetrating Radar method to interpretation subsurface conditions that have the potential to become Subsidence on Jalan Ring Road II Samarinda. East Kalimantan, Ground Penetrating Radar Method is a geophysical method that utilizes the propagation of electromagnetic waves to identify subsurface structures, where the recorded penetration of depth and amplitude is affected by the dielectric properties of a material. This study uses an antenna with a frequency of 100 MHz. Based on the interpretation of radar data the potential for a subsidence to occur on track 1 and track 2, in this layer explains that there is a weak field that occurs due to infiltration where the entry of water flow into the soil through the surface of the ground and the condition of the road is steep so that water easily enters the area that has experienced subsidence due to fractures. On lines 3 and 4 there are several different amplitude intervals that are marked by changes in color on radar data which results in factors of material heterogeneity or water content in the layer.

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