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Ronal Hutagalung

Teknik Geologi, Universitas Negeri Gorontalo

Author-ID : 5915095

Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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Articles

1

Analisis Kelas Massa Batuan Terhadap kestabilan Lereng Bendungan Lolak Menggunakan Metode Rock Mass Rating Fahmy Idris Muarif; Sri Maryati; Ronal Hutagalung
Journal of Applied Geoscience and Engineering Vol 1, No 2 : December 2022
Publisher : Universitas Negeri Gorontalo

The process of displacement or movement of slope stability constituent materials followed by the sedimentation process of the deposited material is a landslide event. The negative impact of the landslide if it occurs in residential areas, can cause material and infrastructure losses, or economic losses in the affected area if the landslide products can cover the road access. The purpose of this study was to determine the level of rock mass and its effect on slope stability, and to determine the rock mass quality of the study area. The research area is located in Lolak Dam. Based on the results of the analysis carried out, the conclusion is that the observations starting from station 1, station 2, station 3, and station 4 show moderate-good rock strength. The condition of the discontinuity shows continuity of less than 1 meter, the aperture of discontinuity are open to a bit wide, with varying roughness, namely coarse, and slightly coarse, with the infilling material calcite veins. The level of weathering starts from weathered to very weathered. Groundwater conditions are dominated by discontinuities that have a dry level. Based on the discontinuity characteristic, station 1 has good rock mass class, station 2 has medium rock mass class, station 3 has medium rock mass class, and station 4 has good rock mass class. this value can be used as a reference value for the next stage of decision making regarding the strengthening of the slopes in the study area.

Estimasi Potensi Cadangan Air Tanah Dengan Metode Persamaan Darcy di Desa Pilomonu, Gorontalo Komang Sugianti; Ahmad Zainuri; Ronal Hutagalung
Journal of Applied Geoscience and Engineering Vol 1, No 1 : Juni 2022
Publisher : Universitas Negeri Gorontalo

This research aims to know the prediction of potential for groundwater reserves. The research method applies surface geological mapping and subsurface data collection with the 200-span Schlumberger configuration geoelectric method. The stratigraphy of the research area is sorted from old to young, the first is the granodiorite unit, the sandstone unit, and alluvial units are deposited inconsistently. The geological structure working in the research area has a dominant northwest-southeast direction. The direction of. groundwater flow follows the topography of the research area, whicb is flowing from the north to the south, where the elevation of the norlh js higher than the eJevation of the south. The aquifer characteristics in the research area can be divided into two based on the mterpretation of geoelectric inversion, such as shallow aquifer with material in the form of sand and deep aquifer with sand and gravel material. Prediction of the potential for groundwater reserves is obtained from the interpretation of geoelectric data and data from the calculation of the groundwater level in the research area by observing the. conditions around the research area So, it is obtained a prediction of potential for shallow groundwater reserves is 360.444 m3/day or equivalent to 360,444 liters/day, and the prediction of poteptial deep groundwater reserves is 66,520.476 m3/day or equivalent to 66:,520,476 liters/day.

Analisis Tipe Longsoran Daerah Pohe Kota Gorontalo Berdasarkan Orientasi Struktur Geologi Fatma T. Usman; Yayu Indriati Arifin; Ronal Hutagalung; Aang Panji Permana
Journal of Applied Geoscience and Engineering Vol 1, No 1 : Juni 2022
Publisher : Universitas Negeri Gorontalo

Administratively, the research area is located in Pohe Village, Hulonthalangi sub-district, Gorontalo City, Gorontalo Province. Astronomically, the research area is at coordinates 00030'16.10"- 00030'41.58" north latitude and 12302'36.10"- 12303'19.55" east longitude. The purpose of this study was to analyze the type of landslide based on the orientation of the geological structure of the Pohe area and the type of landslide based on the orientation of the geological structure of the Pohe area. The method used in this research is retrieval of field data, namely lithological data, geological structure data and slope data of the research area, then structural data processing using dips 6.0 software application and analyzed using stereographic projections. Based on the results of identification and stereographic analysis, it shows that in the research area there are 2 types of landslides, namely plane failure and toppling failure. The type of plane failure is found at stations 1.1, 1.2, 1.3, 1.4, and 1.6. While the type of landslide toppling failure is found at stations 1.5, 1.7, and 1.8.

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