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Georest: Geoscience, Remote Sensing, and Technology

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Published by Earthcare

ISSN : 29637767 EISSN : 29637767 DOI : https://doi.org/10.57265/georest.v1i1

Core Subject : Science,

Astronomy Earth & Planetary Sciences Physics

Georest: Geoscience, Remote Sensing and Technology is an international peer-reviewed open-access journal dedicated to interchange for the results of high-quality research in all aspect of Sciences, Geoscience, Geophysics, Remote Sensing, Drone, Radar SAR, Optical Satellite, LiDAR, Radar Antenna, Computer Science, Computer Engineering, Engineering, Information Technology, and Visualization.

Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika

Articles 16 Documents

1 2

Mapping Coastline Changes In The Mentawai Islands Using Remote Sensing
Georest Vol. 1 No. 1 (2022): Georest
Publisher : EarthCare

The Mentawai Islands are an active deformation zone caused by the movement of the Indo-Australian plate under the Eurasian plate at a speed of 5-6 cm/year. The movement of these plates that occur continuously can be a source of earthquake disasters in the future. However, the information on how much the value of the distance to the coastline changes and the direction of the change has not been well mapped. In this study, a mapping of shoreline changes caused by plate movement along the coast in the Mentawai Islands was carried out using Landsat Imagery. The method used in this research is the Overlay method between Landsat Imagery 2005,2010, and 2020 using ArcGIS software and the Digital Shoreline Analysis System (DSAS) which is used to determine the distance between shoreline changes and the direction of the change. Based on the results of the study, it was found that the coast of the Mentawai Islands showed a change in the coastline with the average distance of change, namely Siberut Island of -2,109 m, Sipora Island at -2,979 m, North Pagai Island at -3,282 m, and South Pagai Island -1,557 m. From the results obtained, the distance of significant shoreline changes that occur in South Pagai Island with the direction of change towards the Northeast.

Estimation of Optimal Blasting Geometry Using Multivariate Modeling to Reduce Boulder Potential and Improve Mining Production
Georest Vol. 1 No. 1 (2022): Georest
Publisher : EarthCare

One of the most critical stages in mining operations is rock encroachment. A commonly used method of laying rocks is blasting which aims to cleave rocks according to the size of the planned fragmentation. The effectiveness of a blasting activity is a benchmark for the success of loading and transportation activities which greatly affects the achievement of mining production targets. This study aims to estimate the optimum blasting geometry to minimize the percentage of the number of boulders so that loading activities become more effective and production targets are achieved. The research case study was conducted on 8 blasting blocks in the South Osela Pit located at PT J Resources Bolaang Mongondow, North Sulawesi, Indonesia. The research data consists of detonation fragmentation, digging time, cycle time, digging rate, and ore mining productivity. The research method was carried out by multivariate modeling and estimation of blasting geometry. The results of multivariate modeling show that to achieve the production target of 700 bcm / hour, the percentage of boulders < 4%, digging time 8 seconds, cycle time 14 seconds, and digging rate 800 bcm / hour. The results of the blasting geometry estimation show that to get the percentage of the number of boulders < 4 % then the optimum blasting geometry is a burden of 3.8 meters; spacebar 3.2 meters; stemming 2.2 meters; blast hole depth 5.8 meters, and powder factor 0.42 Kg/bcm.

Calculation of The Cost of Underground Mining Activities on Tunnel 9 PT. Allied Indo Coal Jaya
Georest Vol. 1 No. 1 (2022): Georest
Publisher : EarthCare

Allied Indo Coal Jaya is one of the mining companies with types of coal mining materials. Mining methods used by PT. Allied Indo Coal Jaya is an open-pit mining and underground mining method. In the underground mining method, the adding system used is a room and pillar where coal extraction activities are carried out semi-conventionally and detonation. Blasting is carried out to support coal production activities to achieve the targets set by the company. However, the problem faced today is the non-achievement of the production target in Tunnel 9, which is 33 tons of coal while the actual production is 18.70 tons of coal. The non-achievement of production targets due to the geometry of blasting is inadequate for the dismantling of coal with the desired target. Based on the calculation of the dimensions of mine progress, it was found that the coal production yield was 17.03 tons of coal, while for blasting activities using the theory of R. L. Ash, it was found that the blasting result was 12.60 tons of coal. With blasting activities that were able to dismantle 12.60 tons of coal and the number of workers as many as 6 people, a mining profit of Rp.52,435,619.27 was obtained. Increased blasting twice daily and the addition of 8 personnel in Tunnel 9 are the answers to raising coal productivity. The addition of blasting activities and the number of workers can increase coal products to 35.20 tons of coal with a mining profit of Rp. 108,407,142,864.

Mapping The Rate Of Deforestation In South Kalimantan Using Landsat Imagery
Georest Vol. 1 No. 1 (2022): Georest
Publisher : EarthCare

South Kalimantan Province is an area that has a very large forest area, but this forest continues to decrease due to deforestation. Deforestation continues to be one of the factors causing flooding. Flooding in this area is a recurring disaster that must be overcome. For this reason, it is necessary to calculate changes in forest area so that forest processing can be carried out properly and that banners can be overcome. In this study, the rate of deforestation was calculated using a map of land use change in South Kalimantan Province through the google earth engine platform using Landsat imagery. The method in this research is supervised classification, which is taking polygon samples in land use classification. The image classification algorithm with javascript on the google earth engine platform will classify the same pixel values into the same classification based on the samples that have been made. Through this platform, images in geo.tif format will be obtained. then the image is processed using ArcGIS software to process the image into a map and the area of each classification. This map was then overlaid between 2015, 2018, and 2020 to see the changes. Based on the results of the study, it was found that there was a change in land use, especially in the forest class and community plantations. Forests decreased to 311,255 hectares with a decreasing rate of 62,251 hectares every year, while community plantations increased by 328,858 hectares with an increase of 65,771 hectares every year.

Utilization of Terra-MODIS Satellites for Phenomenon Analysis Urban Heat Island in Kalimantan Island
Georest Vol. 1 No. 1 (2022): Georest
Publisher : EarthCare

Urban development on the island of Kalimantan in various aspects can in principle increase productivity through the expansion of built-up land. This can have an impact on increasing temperatures in urban areas and lower temperatures around them. This phenomenon is known as urban heat island (UHI). For this reason, it is essential to analyze the phenomenon. The UHI analysis in this study utilizes remote sensing technology using the Terra-MODIS satellite. Terra-MODIS satellite imagery is used to determine land surface temperature (LST) and normalized difference vegetation index (NDVI). The urban areas that are the object of analysis are Pontianak City and Balikpapan. The data used is imagery data from 2001 to 2020. In the province, ESG and NDVI are inversely proportional, but in this study, a condition was produced where the situation was directly proportional. This condition shows that in the analysis of the UHI phenomenon, other factors are needed besides these two parameters, such as humidity and precipitation.

COMPARISON OF CUT AND FILL VOLUME USING PHOTOGRAMMETRIC MEASUREMENT AND TOTAL STATION MEASUREMENT
Georest Vol. 1 No. 2 (2022): Georest
Publisher : EarthCare

Survey activities at the time of mine exploitation aim to map the progress of the mine and to determine the total volume of overburden and coal that has been mined. Currently, the work of mapping surveys has begun to be replaced by observations of recorded data without touching the object or aerial shooting using aircraft or called photogrammetry . The purpose of this study was to determine the difference and difference in volume of autogrammetric processing with volume from survey processing using total stations. From the volume results obtained from the photogrammetric measurements, it will be reduced by the total station survey volume which is considered correct, which is 441,404,769 BCM. The difference between the Cut and Fill Volume of PIT A using Drones and the Volume of Surveys using Total Station is 166,655,453 BCM or around 37.76%. From the difference in the volume of Cut and Fill photogrammetry using each number of GCP points with the volume of Cut and Fill survey total station it can be concluded that the more the number of points GCP then the volume will be closer to the survey volume using Total Station.

SITUATION DETAIL MAPPING OF THE FACULTY OF MATHEMATICS AND NATURAL SCIENCES, UNIVERSITAS NEGERI PADANG USING TOTAL STATION
Georest Vol. 1 No. 2 (2022): Georest
Publisher : EarthCare

Detailed Situation Mapping is one of the efforts to provide geospatial information to assist campuses, in this case Padang State University, especially the Faculty of Mathematics and Natural Sciences. Meanwhile Detailed Situation Mapping is a process of measuring and mapping the topography of the earth's surface on a large scale. The situation map contains elements of natural and man-made features on the earth's surface complete with elevation values represented by contour lines. In the measurement process, mapping survey tools are used. One of the tools used is a total station. To make a detailed map of a place, in this case FMIPA UNP, you need location coordinates that are scattered at various points. In order for the resulting maps to be in accordance with geospatial conditions in the field, various applications such as surpac, autocad, arcgis, and so on are used. In the measurement of the horizontal control frame, the closed polygon method was used, while for the measurement of the vertical control frame, the precision flat measurement method was used. For the measurement of detail points, the extrapolation method is used. Meanwhile, for the measurement of high points, the trigonometric method is used using a total station. The type of research used is quantitative research with a descriptive approach. The quantitative research method is a type of research whose specifications are systematic, planned and clearly structured from the start to the creation of the research design. The detail positioning method is carried out for situation mapping at the State University's Faculty of Mathematics and Natural Sciences by measuring the three-dimensional (x, y, z) position of the details determined by the azimuth component (angle, direction and height difference from the tie point). Because of the large amount of detail that is being measured, measurements are made using a fast technique, called tachymetry.

ANALYSIS OF LAND SUITABILITY FOR CINNAMON (CINNAMOMUN BURMANII) IN SUB-DISTRICT BATIPUH, TANAH DATAR REGENCY
Georest Vol. 1 No. 2 (2022): Georest
Publisher : EarthCare

Penelitian ini dilakukan di Kecamatan Batipuh Kabupaten Tanah Datar, bertujuan untuk mengetahui karakteristik lahan dan tingkat kesesuaian lahan kayu manis. Metode yang digunakan untuk analisis karakteristik lahan adalah metode deskriptif dan untuk analisis tingkat kesesuaian lahan menggunakan metode scoring dengan pendekatan parametrik. Data yang digunakan adalah data primer dan sekunder dengan pengolahan data menggunakan RStudio. Penenelitian ini dilakukan sesuai dengan panduan evaluasi lahan untuk analisis lahan tingkat semi detail. Variabel penelitian berupa tanah, iklim dan topografi dengan indikator berdasarkan Balai Besar Litbang Sumber Daya Lahan. Hasil penelitian ini menunjukkan Kecamatan Batipuh memiliki suhu 150C – 270C, curah hujan dominan 2000 – 2500 mm per tahun dan bertopografi tinggi yang didominasi oleh kelas kelerengan >15% karena berada di jalur bukit barisan, serta kondisi tanah yang dominan sesuai dengan syarat tumbuh kayu manis. Tingkat kesesuaian lahan kayu manis berdasarkan pendekatan parametrik menggunakan RStudio terdapat 2 tingkat kesesuaian lahan di Kecamatan Batipuh, berupa 84,5% untuk luasan S1 dan 15,5% untuk luasan S2.

Slope Stability Analysis Slope Stability Analysis of Plan Disposal OPD 69 Using Geostudio 2007 PT. Pamapersada Nusantara, South Kalimantan: Plan Disposal OPD 69 PT. Pamapersada Nusantara, South Kalimantan
Georest Vol. 1 No. 2 (2022): Georest
Publisher : EarthCare

PT. Pamapersada Nusantara (PAMA) is an industry operating in the field of coal mining contracting, which has an OPD69 disposal which is used as a disposal area for low grade material or overburden. During the formation of the dump, it often experiences landslides caused by the base disposal and the many weak areas on the mining slopes. Therefore the authors identify the occurrence of avalanches at OPD69 so that the slopes become stable and safe, in overcoming this problem a safety factor analysis is carried out. Using geostudio 2007 software to determine the safety factor value with the Morgenstren-price method as a process for making a disposal plan. Based on the safety factor analysis, it was found that SK > 1.25, using an overall slope of 3°. The formation of OPD69 is recommended to follow the redesign dimensions so as to achieve the stability of the disposal slopes that meet the safety criteria. Sections A, B, C, D, and E, with safe slope conditions with an area of 140.47 Ha can accommodate 38,912.12 bcm volume of overburden material at the disposal plan and after being redesigned the volume has changed to 22,260.10 bcm.

Identification of Vulnerable Areas to Maritime Tourists on The Coast of Pacitan Regency
Georest Vol. 1 No. 2 (2022): Georest
Publisher : EarthCare

The Pacitan Regency is renowned for having stunning beaches with panoramic views that can attract tourists. The Pacitan Regency is home to several marine tourism hotspots, including Banyutibo Beach, Buyutan, Ngiroboyo, Pidakan, and Seruni. However, there may be a threat to tourists lurking behind the stunning view of the beaches that directly face the Indian Ocean. Therefore, this study aimed to assess marine hazards based on coastal characteristics in marine tourism destinations in Pacitan Regency through geomorphological approaches, remote sensing, map analysis, and secondary data from agencies, as well as to formulate recommendations for minimizing marine hazards. The collected data were then processed to obtain information on the characteristics of beaches in marine tourism areas and information on marine hazards. This information was then used as the basis for the preparation of marine hazard mitigation recommendations. Based on the results, it was determined that Banyutibo, Ngiroboyo, and Seruni Beaches had all possible marine hazards. Meanwhile, Buyutan Beach experienced both a tsunami sea hazard and extreme waves, whereas Pidakan Beach only had a tsunami sea hazard. Although hacking currents do not occur on all Pacific beaches, the intensity of their occurrence is the most common among other marine hazards in marine tourism areas. Mitigation efforts must be carried out by building cooperation from all parties to reduce the impact of losses due to marine accidents, such as the installation of Marine Hazard Maps, the installation of prohibition signs, socialization, and education about reducing the risk of marine hazards to the community, etc.

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Pakhrur Razi

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Center of Disaster Monitoring and Earth Observation Jl. Prof. Dr. Hamka Air Tawar Padang West Sumatra, Indonesia 25131

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Pakhrur Razi

Contact Email admin@geo-rest.org

Phone +6281299567850

Journal Mail Official admin@geo-rest.org

Editorial Address Center of Disaster Monitoring and Earth Observation Jl. Prof. Dr. Hamka Air Tawar Padang West Sumatra, Indonesia 25131

Location Kota padang, Sumatera barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Pakhrur Razi

Contact Email
admin@geo-rest.org

Phone
+6281299567850

Journal Mail Official
admin@geo-rest.org

Editorial Address
Center of Disaster Monitoring and Earth Observation Jl. Prof. Dr. Hamka Air Tawar Padang West Sumatra, Indonesia 25131

Location
Kota padang,

Sumatera barat

INDONESIA