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Djayus, Djayus
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PEMETAAN DAERAH RAWAN KERUSAKAN AKIBAT GEMPA BUMI DI WILAYAH KOTA PALU TAHUN 2000-2018 BERDASARKAN NILAI PERCEPATAN TANAH MAKSIMUM Saputra, Ary Rhamadan; Djayus, Djayus; 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.v2i2.466

Abstract

Abstract Palu is the city passed by the Palu-Koro active fault so that tectonic earthquakes often occur, some of which are followed by tsunamis, liquefaction and soil movements. The purpose of this research is to determine the value of peak ground acceleration based on earthquake data from 2000-2018 and to find out areas prone to earthquake damage based on the value of peak ground acceleration in the city of Palu. The data in this research are historical data of earthquakes from 2000-2018 with magnitudes 4.5-9 on the Richter scale and depths of 0-70 Km from USGS (United States Geological Survey) as much 9 data. Earthquake data is processed using empirical equation model Mc. Guirre K. and Donovan to get the value of peak ground acceleration at each specified observation point (grid) by the boundary area 0o37’ LS - 0o58’ LS dan 119o45’ BT - 121o3’ BT. The value of Peak Ground Acceleration at each observation point is processed using software for mapping to get the mapping results. Results of the research, the value of Peak Ground Acceleration in the city of Palu was based on earthquake data from 2000-2018 with Mc. Guirre R.K model ranging from 105,442 - 108,899 gal while the Donovan model ranging from 112,832 - 116,585 gal. The level of earthquake damage in the city of Palu from the highest to the lowest in sequence, namely the districts of North Palu, Tawaeli, Mantikulore, East Palu, Ulujati, West Palu, South Palu and Tatanga.
ANALISIS KADAR EMISI TRANSPORTASI DI SAMARINDA BERDASARKAN TIPE MESIN DAN KAPASITAS MESIN Yanti, Derli; Mislan, Mislan; Djayus, Djayus
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.v3i2.696

Abstract

Transportation emission levels can be analyzed based on the type of engine used. The purpose of this study is to determine the level of vehicle emissions each year and compare in samarinda. This research was conducted by measuring air emissions in different tool brands, the sukyoung SY-GA 401 brand used was the type of injection engine and carburetor, and the AGS-688 brand used was a diesel / diesel engine type where the measurement of the emission levels used the tool Automotive Emission Analyzer. Data was collected at the Kesuma Bangsa, Slamet Riyadi, and Wahid Hasyim points in 2013, 2014, 2015, 2016, 2018 in samarinda region known data on air emission levels, namely: Total pollutants of carbon monoxide (CO), carbon dioxide (CO2), carbon monoxide correction (COcorr), hydrocarbons (HC), oxygen (O2) and lambda (λ). The results showed that the analysis of air emission levels with the highest type of pollutant injection machine, namely HC in 2015 was 107.82 ppm based on the quality standard limits set by LH regulation No 05 of 2006 did not exceed the quality standard threshold of 200 ppm, pollutant carburetors the highest was found in HC pollutants in 2015 amounting to 434.35 ppm exceeding the quality standard threshold of 200 ppm and the highest solar pollutants were in the opacity pollutants in 2015 of 80.28% HSU based on the quality standard threshold stipulated by LH Regulation 05/2006 exceeding the quality standard threshold of 70% HSU.
Interpretasi Data Geophysical Logging untuk Penentuan Sebaran Seam Batubara dalam Bentuk Model 3D Batrisyia, Nisa; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol. 6 No. 2 (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.v6i2.1086

Abstract

In coal exploration activities, geophysical methods are usually used. One of the most accurate and effective geophysical methods that is still used in coal exploration today is the well logging method. The purpose of this research is to determine the distribution of coal seams in 3D based on well logging data. The data used in this study is secondary data which includes Gamma Ray Log data, Density Log data, and coordinate point data. Gamma Ray Log and Density Log data are interpreted to determine the types of lithology that make up the drill holes, especially coal. Based on the interpretation of the 3D model of the distribution of coal seams in each data it is known that in Seam A it tends to thin to the Southeast and thicken to the North-East, in Seam B it tends to thin out to the Southeast and Northeast, and in Seam C it tends to split to the North-West. and Northeast with a strike ranging from N 53ºE to N 116ºE with a dip ranging from 5º to 12º.
ANALISIS KLASIFIKASI LAJU EROSI MENGGUNAKAN METODE UNIVERSAL SOIL LOSS EQUATION (USLE) DENGAN SIG DI KOTA SAMARINDA Sadewo, Wisnu; Subagiada, Kadek; Djayus, Djayus
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 Wibowo, Nobella Hadi; Djayus, Djayus; 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.v6i1.1043

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 Kusmardiyanti, Retni; Yusuf, Mustaid; Djayus, Djayus; Rahmiati, Rahmiati
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
Laju Infiltrasi Air di Lubang Biopori pada Berbagai Jenis Tanah di Kelurahan Loa Bakung Arrosyidah, Mosy R; Djayus, Djayus; Mislan, Mislan; Munir, Rahmiati
GEOSAINS KUTAI BASIN Vol. 7 No. 1 (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.v7i1.1237

Abstract

The reduction of green open space results in a lack of infiltration of rainwater into the soil and an increase in the amount of surface flow, one solution to overcome these problems is to implement a biopore infiltration hole system. This study aims to determine the rate and capacity of water infiltration in biopore holes based on various soil types in Loa Bakung Village. The infiltration rate was determined through direct measurement at 9 points in 3 locations with gleisol, podzolic, and podzolic haplik soil types, then measured by putting water into a hole with a diameter of 10 cm with a depth of 80 cm - 100 cm. The parameters measured are the difference in distance or height and time. The results of parameter measurements were made into a graph to obtain the highest infiltration rate at the research location, and determine the infiltration capacity using the Horton equation. Then, soil samples were analyzed by measuring soil physical properties that affect infiltration rates such as texture, porosity, permeability, and moisture content. The results showed that the infiltration rate and infiltration capacity varied in each location. Location 2 with podzolic soil type shows the highest infiltration rate and capacity value of 2820 cm/hour with an infiltration capacity of 2782.84 cm/hour. Followed by location 1 which is a gleisol soil type of 1224 cm/hour with an infiltration capacity of 1217.72 cm/hour, and the lowest value is shown in location 3 with a haplik podzolic soil type of 1050 cm/hour with an infiltration capacity of 1041.46 cm/hour.
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 Wahyuni, Sri; Supriyanto, Supriyanto; Djayus, Djayus
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.
Penentuan Litologi Batuan di Daerah Samboja Berdasarkan Analisis Pemodelan 3D Data Cutting dan Data Logging Geofisika Situmeang, Edberg; Djayus, Djayus; Wahidah, Wahidah; Supriyanto, Supriyanto; Lepong, Piter
GEOSAINS KUTAI BASIN Vol. 6 No. 2 (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.v6i2.1087

Abstract

The interpretation of rock lithology is inaccurate if it only uses cutting data, so it must be assisted with other data, including logging data. The purpose of this study was to determine the lithological arrangement of rocks based on cutting data and logging data and to compare the cross section results of cutting data and logging data. This study uses cutting data and logging data (gamma ray log and density log). Cutting data and logging data will be interpreted and processed into 2D and 3D sections which are corrected with topographical data including coordinates, elevation values, strike dip and total depth. The results of processing from both methods, obtained lithology composition in the form of soil, silt, sand, coal, clay, carbon and carbont clay.
: Analisis Persebaran Intensintas Penerangan Di Laboratorium Balai Keselamatan Dan Kesehatan Kerja (K3) Samarinda Berdasarkan PERMANKER No. 5 Tahun 2018 Menggunakan Metode Mapping Hasmah, Siti; Munir, Rahmiati; Djayus, Djayus; Putri, Erlinda Ratnasari
Progressive Physics Journal Vol. 5 No. 1 (2024): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v5i1.1032

Abstract

A light is needed by humans to recognize an object visually. Good lighting allows people to see the objects they are working on clearly and quickly. There is a national standardization that is used as a race for the intensity of lighting that is categorized based on the type of work performed. Therefore, this study aims to determine the level of intensintas lighting in the Laboratory of the Center for Occupational Safety and health (K3) Samarinda based PERMENAKER No. 5 of 2018. In this study using the mapping method used as the determination of the coordinate points and then use the Lux meter EC 1 and Laser Meter Distance for data retrieval illumination. The results obtained the intense level of illumination in the Laboratory of the Center for Occupational Safety and health (K3) Samarinda based on PERMENAKER No. 5 of 2018 (lighting standards according to job classification) the work areas that meet the standards are on the administration workbench, pretreatment table (Room 8), and fume hood laying room (Room 7) while the work areas of the weighing room (Room 1), UV-VIS room (Room 2), Spectrophoto room (Room 3), Natural absorption room (Room 4), and solid chemical room (Room 5) did not meet the standards.
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 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, Nanda 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