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All Journal Jurnal Zarah Journal of Geoscience, Engineering, Environment, and Technology Journal of Applied Geospatial Information OPHIOLITE : Jurnal Geologi Terapan
Adi Suryadi, Adi
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Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Environmental Science Physics

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Geological Structure Analysis to Determine the Direction of the Main Stress at Western Part of Kolok Mudik, Barangin District, Sawahlunto, West Sumatera Jannah, Miftahul; Suryadi, Adi; Zafir, Muchtar; Saputra, Randi; Hakim, Ihsanul; Ariyuswanto, Riki; Yusti, Ulfa
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 1 (2017): JGEET Vol 02 No 01 : March (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.328 KB) | DOI: 10.24273/jgeet.2017.2.1.20

Abstract

On the study area there are three types of structure, those are fault, fold and joint. Types of fault were found  in the study area, reverse fault with the strike/dip is N215oE/75o, normal fault has a fault directions N22oE and N200oE with pitch 35o, and dextral fault with pitch 10o and strike N219oE. Fold and joint structures used to determine the direction of the main stress on the study area. Further, an analysis used stereonet for data folds and joints. So that from the data got three directions of main stress, those are Northeast – Southwest (T1), North – South (T2) and Southeast – Northwest (T3). On the Northeast – Southwest (T1) stress there are four geological structures, anticline fold at ST.3 , syncline folds at ST. 13a, ST. 13b, ST. 13c and ST. 33, chevron fold at ST. 44 and joint at ST. 2. On the North – South (T2) stress there are three geological structures, those are syncline fold at ST. 35, anticline fold at ST. 54 and joints at ST. 41, ST. 46 and ST. 47. On the Southeast – Northwest (T3) stress were also three geological structures, those are chevron fold at ST 42a, overturned fold at ST. 42b, syncline fold at ST. 42c and joints at ST. 5 and ST. 34.
Fault analysis to Determine Deformation History of Kubang Pasu Formation at South of UniMAP Stadium Hill, Ulu Pauh, Perlis, Malaysia Suryadi, Adi
Journal of Geoscience, Engineering, Environment, and Technology Vol 1 No 1 (2016): JGEET Vol 01 No 01 : December (2016)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (820.89 KB) | DOI: 10.24273/jgeet.2016.11.1

Abstract

The Kubang Pasu Formation at South of UniMap Stadium Hill has suffered deformation that produced fault with various types and orientations. First deformation (ST1) is southeast – northwest were resulted normal, reverse, dextral and sinistral fault. At station 32, Reverse fault (N940E/480) from ST1 was cut by reverse fault (N480E/400) result of second deformation (ST2). Another cross cutting fault found at station 108, third deformation (ST3) with stress direction from northeast – southwest that produced reverse fault with strike direction N1340E and 680 of dip angle was cutting the reverse fault (N870E/660) from second deformation. The youngest deformation (ST4) has stress from east – west. At station 110, normal fault (N900E/300) is representing the youngest deformation was cutting the reverse fault (N1540E/520) from third deformation.
Groundwater exploration using Vertical Electrical Sounding (VES) Method at Toro Jaya, Langgam, Riau Suryadi, Adi; Putra, Dewandra Bagus Eka; Kausarian, Husnul; Prayitno, Budi; Fahlepi, Reza
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 4 (2018): JGEET Vol 03 No 04 : December (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2239.067 KB) | DOI: 10.24273/jgeet.2018.3.4.2226

Abstract

Vertical Electrical Sounding (VES) method is one of many methods in geophysics that was conducted in this research at Toro Jaya, Langgam, Riau. The aim of this research is to investigate and locate the depth of groundwater layer (aquifer). Data acquisition of VES was carried out using GEOCIST with Schlumburger configuration of electrode. There are four VES point in this research with various length of cable ranging from 135 m up to 200 m. From four VES point shown two different of resistivity value range. Very low resistivity value with range 0,34 – 0,9 Ωm interpreted as aquifer layer. The aquifer layer of research area divided into two types which are unconfined aquifer and confined aquifer. Meanwhile, another resistivity value ranging from 1,69 – 7  Ωm was interpreted as clay layers.
Infiltration Rate of Quarternary Sediment at Rumbio Jaya, Kampar, Riau Suryadi, Adi; Choanji, Tiggi; Wijayanti, Desy
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 1 (2018): JGEET Vol 03 No 01 : March (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1953.256 KB) | DOI: 10.24273/jgeet.2018.3.1.1223

Abstract

The study of infiltration rate was conducted at Rumbio Jaya, Kampar, Riau which closed with meandering river of Kampar. Infiltration rate data collected by using double ring infiltrometer with 30 cm and 60 cm diameter of cylinder. To support the data of infiltration test at quarternary sediment, subsurface soil profiling data were taken with hand auger drilling. The result of infiltration rate analysis shown the highest value is located at ST 2 and ST 3 (southwest part of study area) with value 248 mm/hr and 159 mm/hr. infiltration rate gradually decreasing toward northeast of study area with lowest value 2.6 mm/hr at ST 6 which caused location very closed to Kampar River. Core data from hand auger drilling support result of infiltration rate with gravelly sand layer (high porosity and permeability) are dominated at study area and some low infiltration rate location consists of thick layer of silt.
Structural Geology Analysis In A Disaster-Prone Of Slope Failure, Merangin Village, Kuok District, Kampar Regency, Riau Province Yuskar, Yuniarti; Putra, Dewandra Bagus Eka; Suryadi, Adi; Choanji, Tiggi; Cahyaningsih, Catur
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 4 (2017): JGEET Vol 02 No 04 : December (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1527.18 KB) | DOI: 10.24273/jgeet.2017.2.4.691

Abstract

The geological disaster of landslide has occurred in Merangin Village, Kuok Subdistrict, Kampar Regency, Riau Province which located exactly in the national road of Riau - West Sumatra at Km 91. Based on the occurrence of landslide, this research was conducted to study geological structure and engineering geology to determine the main factors causing landslides. Based on measurement of the structural geology found on research area,  there were fractures, faults and fold rocks which having trend of stress N 2380 E,  plunge 60, trending NE-SW direction. Several faults that found was normal faults directing N 2000 E with dip 200 trending from northeast-southwest and reverse fault impinging N 550 E with dip 550, pitch 200 trending to the northeast. Fold structures showing azimuth N 2010 E trending southeast-northwest. From geological engineering analysis, the results of scan line at 6 sites that have RQD value ranges 9.4% - 78.7 % with discontinuity spacing 4 - 20 cm. So,  It can be concluded that the formed structure was influenced by the extensive northeast-southwest tectonic phase, then continued through north-south tectonic phase, and ended by a tectonic period with directing from northeast-southwest. Rock Mass Rating classification showing value 62 – 76,  Which also resulted that rocks in the study area have weathered on the outside but still in good condition (good rock). However, This condition of structure has caused the formation rocks producing weak zone that became one cause of the occurrence of landslides.
Petrography, Geology Structure and Landslide Characterization of Sumatra Fault Deformation: Study Case In Km 10-15 Highway, Koto Baru Sub District, West of Sumatra Cahyaningsih, Catur; Crensonni, Puja Fransismik; Aditia, Yogi; Suryadi, Adi; Yuskar, Yuniarti; Choanji, Tiggi; Putra, Dewandra Bagus Eka
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 4 (2018): JGEET Vol 03 No 04 : December (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1180.236 KB) | DOI: 10.24273/jgeet.2018.3.4.2062

Abstract

Research area is around Tanjung Balik, Koto Baru Sub Base, Lima Puluh Kota District, West Sumatra Province. Located along the highway Km 10-15 Riau – West Sumatra and the coordinate around 00˚08'40 '' LU - 0˚11'20 '' N and 100˚45'20 '' BT - 100˚47'00 '' BT. The purpose of research to identify petrography, microstructure, types of landslides and the geological condition. The methods using polarization microscope, stereography, landslide identification survey and geological mapping. The result of study shows the petrography analysis of lithology of study area are classified into three types of rocks are Feldspathic Greywacke, Lithic Arenite, and Slate. Microstructures trending system show the foliation structure that is relatively Southeast-Northwest. Types of landslide which dominates in the research area are debris avalanche and translational landslide. Geological analysis show some of rock units are classified into two units: Sandstone Unit and Slate Unit. Sandstone Unit spread in the northern part of the study area, while Slate Unit spread in the southern part of the study area. The characteristics of these rocks showed Pematang Formation.
Implications of Clay Minerals in Landslide Disasters: Case Study of the Riau - West Sumatra Highway KM 82 - 89 Suryadi, Adi; Wuldan, Muhammad; Kausarian, Husnul
Journal of Applied Geospatial Information Vol. 8 No. 2 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i2.7135

Abstract

The research area is along the Riau - West Sumater highway KM 82 - 89 where landslides are very common. The factors most often discussed are rainfall intensity, degree of slope, geological structure and the presence of plants. In this research, the factor of the presence of clay is the main focus in its influence on the occurrence of landslides. Landslide sampling is carried out at landslide locations. Soil samples were also carried out in laboratory simulations of the process of landslides. The methods used to identify the type of clay are Scanning Electron Microscope (SEM) and X-ray diffraction analysis (XRD). The results of the analysis showed that all of the 3 soil samples analyzed using SEM showed the presence of Kaolinite, Montmorillonite and Illite types of clay. In terms of the percentage of clay presence based on XRD analysis at 3 stations, it shows the presence of Kaolinite clay in each soil sample with the percentage of ST1, ST2 and ST3 Kaolinite presence are 29.55%, 18.33% and 36.67%. The presence of Montmorillonite and Illite is indicated by the presence of the mineral Muscovite from the SEM analysis results where its presence is only found in ST1 and ST2 with percentages of 34.85% and 26.67%. The implication of the presence of Montmorillonite and Illite clay is an important factor in the occurrence of landslides, especially the size of the landslide that occurs. This is shown by the linearity between the percentage of Montmorillonite and Illite presence and the distance of the landslide that occurred in the simulation results.
Aplikasi Electical Resistivity Imaging (ERI) untuk investigasi Airtanah: Studi Kasus di Halaman Gedung Rektorat Universitas Islam Riau Suryadi, Adi; Pratama, David Toddy; Kausarian, Husnul; Batara, Batara
OPHIOLITE: Jurnal Geologi Terapan Vol 5 No 2 (2023): OCTOBER 2023
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v5i2.p70-77

Abstract

Universitas Islam Riau merupakan salah satu universitas tertua yang ada di kota Pekanbaru. Kebutuhan air bersih terus meningkat seiring perkembangan universitas ini. Sebelumnya, pengeboran airtanah gagal dilakukan, karena pekerjaan tidak diawali dengan identifikasi kondisi geologi bawah permukaan. Penelitian ini bertujuan untuk mengetahui kondisi geologi bawah permukaan agar dapat ditentukan lokasi pengeboran airtanah yang sesuai. Metode yang digunakan adalah metode Electrical Resistivity Imaging (ERI) dengan menggunakan Geocis Resistvity meter multi elektroda (32 elektroda), pengeboran airtanah untuk mendapatkan airtanah sekaligus log stratigrafi bawah permukaan dan persampelan airtanah untuk pengujian kualitas airtanah menggunakan peralatan YSI-Pro. Hasil analisis ERI didapatkan lapisan akuifer berada pada kedalaman 20 – 75 meter dengan nilai resistivitas 8456 – 87532 Ωm yang diinterpretasikan sebagai lapisan pasir.  Hal ini dikonfirmasi dengan pengeboran yang menunjukkan bahwa di bawah permukaan didominasi oleh pasir halus berdasarkan hasil analisis granulometri. Selain itu, interpretasi ERI mampu mengidentifikasi penyebab kegagalan pengeboran sebelumnya. Kegagalan disebabkan terdapatnya bongkah batuan pada kedalaman 15 meter dengan geometri membulat. Nilai resistivitas bongkah tersebut masuk dalam kategori resistivitas tinggi yaitu >87532 Ωm. Kondisi airtanah yang didapatkan mempunyai kualitas yang baik dengan indikator warna jernih, tidak berbau, rasa tawar, temperatur 27°C, pH netral (6.55), konduktivitas 0.0461 µs/cm, dan zat padat terlarut 28.5 mg/L.
KARAKTERISTIK FISIKOKIMIA DAN ANALISIS KELAYAKAN AIR TANAH DANGKAL DI TELUK BELITUNG, KEPULAUAN MERANTI, RIAU Mairizki, Fitri; Yandra Putra, Arief; Suryadi, Adi; Zakia Rosyada, Hilwa
Jurnal Zarah Vol. 13 No. 1 (2025): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Teluk Belitung berada di pesisir Pulau Padang, Meranti, sangat bergantung pada keberadaan airtanah sebagai sumber air bersih yang dimanfaatkan dalam kehidupan sehari – hari. Namun, airtanah dangkal di permukiman yang berdekatan dengan laut cenderung memiliki rasa payau hingga asin, serta dapat menyebabkan karat pada peralatan makan. Tujuan penelitian ini adalah untuk mengetahui karakteristik fisikokimia dan kelayakan airtanah dangkal di daerah penelitian. Hasil pengukuran parameter fisikokimia dibandingkan dengan Peraturan Menteri Kesehatan No.492/MENKES/PER/IV/2010 tentang standar kualitas air minum. Hasil penelitian menunjukkan 58% air tanah berwarna keruh, 12% berwarna coklat kemerahan, 12% tidak berwarna, 6% berwarna kuning, 6% berwarna kuning kecoklatan, dan 6% berwarna coklat. 64% air tanah berasa payau, 18% berasa asin dan 18% tidak berasa. TDS air tanah 23,85 mg/L - 10.458 mg/L. DHL air tanah 36,45 μS/cm - 16.970 μS/cm. pH air tanah 6,86 - 7,45. 88% air tanah memiliki kesadahan ≤ 500 mg/L dan 12% memiliki kesadahan > 500 mg/L. 53% air tanah memiliki kadar Cl- > 250 mg/L dan 47% memiliki kadar Cl- ≤ 250 mg/L. Semua stasiun memiliki kadar SO42- ≤ 250 mg/L. Daerah penelitian dapat dibagi menjadi 3 zonasi, yaitu zona risiko tinggi (tidak layak) sebanyak 35%, zona risiko sedang (berisiko) sebanyak 29% dan zona risiko rendah (cenderung layak) sebanyak 36%. Penelitian ini diharapkan dapat memberikan informasi dasar bagi pengelolaan sumber daya air yang berkelanjutan dan pemenuhan kebutuhan air bersih di Kepulauan Meranti.
Co-Authors A.A. Ketut Agung Cahyawan W Aditia, Yogi Batara, Batara Budi Prayitno Catur Cahyaningsih, Catur Crensonni, Puja Fransismik Dewandra Bagus Eka Putra, Dewandra Bagus Eka Fahlepi, Reza Fitri Mairizki, Fitri Husnul Kausarian Ihsanul Hakim, Ihsanul Muchtar Zafir, Muchtar Pratama, David Toddy Randi Saputra Riki Ariyuswanto, Riki Tiggi Choanji, Tiggi Ulfa Yusti, Ulfa Wijayanti, Desy Wuldan, Muhammad Yandra Putra, Arief Yuniarti Yuskar, Yuniarti Zakia Rosyada, Hilwa