scholarly journals INVESTIGASI SUMBER AIR TANAH MENGGUNAKAN METODE GEOLISTRIK RESISTIVITAS KONFIGURASI SCHLUMBERGER DAN PENGEBORAN

2021 ◽  
Vol 7 (2) ◽  
Author(s):  
Muhammad Fathur Rouf Hasan ◽  
Anjar P Azhari ◽  
Putera Agung Maha Agung
Keyword(s):  
Ground Surface ◽  
Environmentally Friendly ◽  
Environmental Damage ◽  
Drilling Process ◽  
Measurement Point ◽  
Research Results ◽  
Resistivity Method ◽  
Geoelectrical Resistivity ◽  
Process Measurements

Penelitian ini bertujuan untuk mencari keberadaan sumber air tanah. Metode yang digunakan adalah geolistrik resistivitas konfigurasi schlumberger dan proses pengeboran. Pengukuran dilakukan pada 4 titik dengan bentangan 400 meter dan jarak antar elektroda 10 meter. Hasil penelitian menunjukkan indikasi keberadaan air tanah ditemukan pada titik pengukuran 3 kedalaman 36-55 meter dibawah permukaan tanah dengan nilai resistivitas sebesar 0,97 Ωm. Proses pengeboran dilakukan pada titik 3 sesuai rekomendasi, adapun hasil dari pengeboran menunjukkan informasi keberadaan air tanah ditemukan pada kedalaman 46 m dibawah permukaan tanah, hasil ini sesuai dengan informasi yang diperoleh dari hasil penelitian. Identifikasi keberadaan air tanah menggunakan metode geolistrik resistivitas terbukti cukup ramah lingkungan, karena tidak ada kerusakan lingkungan yang ditimbulkan. Kata kunci: air tanah, geolistrik resistivitas, konfigurasi schlumberger, pengeboran.  This study aims to determine the existence of groundwater. The method used in this research is the geoelectrical resistivity method with schlumberger configuration and drilling process. Measurements were made at 4 points with a span of 400 meters and a distance between electrodes of 10 meters. The results showed indications of the presence of groundwater were found at measurement point 3, a depth of 36-55 meters below the ground surface with a resistivity value of 0.97 Ωm. The drilling process was carried out at point 3 according to the recommendations, while the drilling results showed information on the presence of groundwater at a depth of 46 m below the ground surface, this result is the same as the information obtained from the research results. The identification of groundwater using geoelectrical resistivity method is proven to be quite environmentally friendly because there is no environmental damage caused.  Keywords: drilling, geoelectrical resistivity, groundwater, schlumberger configuration.  

Aplikasi metode tahanan jenis dalam studi geologi karst Gua Seropan di Gunung Kidul, Yogyakarta

2017 ◽  
Vol 12 (2) ◽  
pp. 105-116
Author(s):  
Pulung A. Pranantya ◽  
Nurlia Sadikin
Keyword(s):  
Fresh Water ◽  
Ground Surface ◽  
Water Source ◽  
Raw Water ◽  
Limited Information ◽  
Resistivity Method ◽  
Central Java ◽  
Underground River ◽  
Initial Exploration

In terms of geology, most areas in south of the Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the existence of underground river in caves, however, indicate the potential amount of water within the area, especially in the eastern part of the Gunungkidul District. Although limited information available, some fishermen have discovered that Seropan cave contains fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using a multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The isopach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results, i.e. 110o2223.6388 EL 8o42.874 SL. [DY1][PP2][DY1]Perbaiki grammarIn terms of geology, most areas in south of Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the exixtence of underground river in caves, however, indicate potential amount of water within the area especially in eastern part of Gunungkidul District. Although limited information available, some fishermans has discovered that Seropan cave contain fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The iso pach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results i.e. 110o2223.6388 EL 8o42.874 SL.[PP2]Sudah diperbaiki

scholarly journals Past climate changes and permafrost depth at the Lake El'gygytgyn site: implications from data and thermal modeling

2013 ◽  
Vol 9 (1) ◽  
pp. 119-133 ◽  
Author(s):  
D. Mottaghy ◽  
G. Schwamborn ◽  
V. Rath
Keyword(s):  
Surface Temperature ◽  
Thermal Regime ◽  
Climate Changes ◽  
Ground Surface ◽  
Temperature Data ◽  
Ice Age ◽  
Drilling Process ◽  
Past Climate ◽  
Ground Surface Temperature ◽  
Recent Climate

Abstract. This study focuses on the temperature field observed in boreholes drilled as part of interdisciplinary scientific campaign targeting the El'gygytgyn Crater Lake in NE Russia. Temperature data are available from two sites: the lake borehole 5011-1 located near the center of the lake reaching 400 m depth, and the land borehole 5011-3 at the rim of the lake, with a depth of 140 m. Constraints on permafrost depth and past climate changes are derived from numerical simulation of the thermal regime associated with the lake-related talik structure. The thermal properties of the subsurface needed for these simulations are based on laboratory measurements of representative cores from the quaternary sediments and the underlying impact-affected rock, complemented by further information from geophysical logs and data from published literature. The temperature observations in the lake borehole 5011-1 are dominated by thermal perturbations related to the drilling process, and thus only give reliable values for the lowermost value in the borehole. Undisturbed temperature data recorded over more than two years are available in the 140 m deep land-based borehole 5011-3. The analysis of these observations allows determination of not only the recent mean annual ground surface temperature, but also the ground surface temperature history, though with large uncertainties. Although the depth of this borehole is by far too insufficient for a complete reconstruction of past temperatures back to the Last Glacial Maximum, it still affects the thermal regime, and thus permafrost depth. This effect is constrained by numerical modeling: assuming that the lake borehole observations are hardly influenced by the past changes in surface air temperature, an estimate of steady-state conditions is possible, leading to a meaningful value of 14 ± 5 K for the post-glacial warming. The strong curvature of the temperature data in shallower depths around 60 m can be explained by a comparatively large amplitude of the Little Ice Age (up to 4 K), with low temperatures prevailing far into the 20th century. Other mechanisms, like varying porosity, may also have an influence on the temperature profile, however, our modeling studies imply a major contribution from recent climate changes.

scholarly journals Identification of Aquifer in the MIPA Faculty - University of Jember Using 1D Geoelectrical Resistivity Method with Schlumberger Array

2020 ◽  
Vol 21 (2) ◽  
pp. 123
Author(s):  
Bayu Buwana ◽  
Nurul Priyantari ◽  
Supriyadi Supriyadi
Keyword(s):  
Volcanic Rocks ◽  
Natural Sciences ◽  
Subsurface Structures ◽  
Resistivity Method ◽  
Academic Activities ◽  
Geoelectric Resistivity ◽  
Geoelectrical Resistivity ◽  
Resistivity Log ◽  
The University ◽  
Schlumberger Array

Faculty of Mathematics and Natural Sciences University of Jember located in Sumbersari District with lithological conditions in the form of volcanic rocks, lithosol soils, and regosol soils that are capable of absorbing water and potentially as aquifers. In point of fact, in the campus zona of the University of Jember including in the Faculty of Mathematics and Natural Sciences, there is always a shortage of freshwater for various academic and non-academic activities. Therefore, research needs to be conducted to assess the lithology of subsurface structures in the FMIPA zone so that the depth of groundwater layers and aquifer layers can be determined. The study was conducted using the Schlumberger array geoelectric resistivity method at 5 VES points. The results obtained in the form of resistivity log curves can be seen that at the five points VES has lithology in the form of clay, gravel, sandstone, and groundwater layer. Each VES point was identified the groundwater layer and some of them were identified as aquifers. The aquifer with the greatest thickness is found at point VES 2, which is to the west of the Baitul Ilmi Mosque, so it is recommended as the location of a new well.Keywords: lithology, aquifers, geoelectric resistivity method, groundwater.

scholarly journals Communication Network Structure in Building Environmentally Friendly Behavior (The Case of a Dense Community in Bogor City)

2019 ◽  
Vol 7 (2) ◽  
pp. 119-125
Author(s):  
Megafirmawanti Lasinta ◽  
Nurmala Katrina Pandjaitan ◽  
Sarwititi Sarwoprasodjo
Keyword(s):  
Communication Network ◽  
Communication Networks ◽  
Urban Areas ◽  
Environmentally Friendly ◽  
Communication Process ◽  
Primary Data ◽  
Environmental Damage ◽  
Community Members ◽  
Personal Network ◽  
The Government

Efforts to solve environmental pollution in densely populated communities in urban areas are not only the responsibility of the government. Communities as part of social system also have an important role to control the environmental impacts of pollution. One way that community members must do in reducing environmental damage is familiarize environmentally friendly behavior. This research focuses on the analysis of environmentally friendly behavior of Pulo Geulis community members in Bogor City. Pulo Geulis is a Delta in the middle of the Ciliwung River which more or less contributes to whether or not the Ciliwung River is polluted in Bogor City. The communication process is an important factor in changing individual behavior. This study aimed to analyze the structure of community communication networks in developing environmentally friendly behavior. Primary data was obtained through a survey of 100 respondents and in-depth interviews with several informants. Data were analyzed using sociometric methods. The results of sociometric analysis showed that the structure of the community communication network in building community-friendly behavior is a radial personal network. This structure illustrated that community information centers are located in certain individuals such as head of RW, head of RT, or Posyandu cadres. The radial personal network in this study also described the formation of clique, star, bridge, and isolates in the community communication network at Pulo Geulis.

Torsional Vibrations and Nonlinear Dynamic Characteristics of Drill Strings and Stick-Slip Reduction Mechanism

2019 ◽  
Vol 14 (8) ◽  
Author(s):  
Jialin Tian ◽  
Genyin Li ◽  
Liming Dai ◽  
Lin Yang ◽  
Hongzhi He ◽  
...  
Keyword(s):  
Torsional Vibration ◽  
Nonlinear Dynamic ◽  
Drill String ◽  
Drilling Process ◽  
Drill Bit ◽  
Torsional Vibrations ◽  
Reduction Mechanism ◽  
Nonlinear Dynamic Model ◽  
Stick Slip ◽  
Research Results

Torsional stick–slip vibrations easily occur when the drill bit encounters a hard or a hard-soft staggered formation during drilling process. Moreover, serious stick–slip vibrations of the drill string is the main factor leading to low drilling efficiency or even causing the downhole tools failure. Therefore, establishing the stick–slip theoretical model, which is more consistent with the actual field conditions, is the key point for new drilling technology. Based on this, a new torsional vibration tool is proposed in this paper, then the multidegree-of-freedom torsional vibrations model and nonlinear dynamic model of the drill string are established. Combined with the actual working conditions in the drilling process, the stick–slip reduction mechanism of the drill string is studied. The research results show that the higher rotational speed of the top drive, smaller viscous damping of the drill bit, and smaller WOB (weight on bit) will prevent the stick–slip vibration to happen. Moreover, the new torsional vibration tool has excellent stick–slip reduction effect. The research results and the model established in this paper can provide important references for reducing the stick–slip vibrations of the drill string and improving the rock-breaking efficiency.

Design and Research of Environmentally Compound Deicing Techniques

2013 ◽  
Vol 734-737 ◽  
pp. 2746-2751
Author(s):  
Jian Zhao Zhou ◽  
Xiao Pan Xu ◽  
Wei Jun Chu ◽  
Ju Ying Dai ◽  
Yun He Chen ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Mechanical Milling ◽  
Thermal Water ◽  
Environmentally Friendly ◽  
Water Jet ◽  
New Method ◽  
Accident Rate ◽  
Research Results ◽  
Water Jet Cutting ◽  
Working Principle

Determining how to strikingly and environmentally reduce the accident rate on roads in the snow weather, and ensure the traffic flow and safety in the icy district has become a tough issue nowadays. In the context, this article analyzed the series of current research results on different deicing techniques, and presents a new method which combines the thermal water-jet cutting with mechanical-milling deicing technique. It also introduces the structure and working principle of this device, together with the practicality design. The experiments indicate that this device can perform well in deicing work, environmentally friendly and satisfy to the requirements of design.

scholarly journals Research on Formation Identification Based on Drilling Shock and Vibration Parameters and Energy Principle

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Yu Ding ◽  
Zhuoying Tan ◽  
Shuguang Li ◽  
Zizhen Miao ◽  
Huifen Qu
Keyword(s):  
Prediction Accuracy ◽  
Rotation Speed ◽  
Fluid Pressure ◽  
Drilling Process ◽  
Drilling Rate ◽  
Prediction Formula ◽  
Axial Pressure ◽  
Rotary Drilling ◽  
Research Results ◽  
Drilling Rig

In geotechnical engineering and geological survey, the stratum structure and its corresponding physical and mechanical properties are the most concerned. The stratum structure not only affects the safety of the project but also plays a decisive role in the construction method and construction sequence. In this paper, a new type of stratum geological interface recognition system is adopted, and an R-20 rotary drilling rig is used to conduct on-site drilling experiments for a granite site with no ventilation. The research results show that the system can monitor and record the main parameters (axial pressure, drilling rate, rotation speed, flushing fluid pressure, and torque) of the drilling rig during the drilling process. The comparative analysis of monitoring data and on-site survey results shows that different drilling parameters have different sensitivities to changes in the formation structure. According to the prediction accuracy, the ranking from high to low is drilling rate, axial pressure, torque, rotation speed, and flushing fluid pressure. In drilling engineering, by observing the change law of drilling rig parameters, not only can the position of the special rock mass interlayer be predicted, but also the stratum structure and strength can be identified, and the prediction formula is also given. Based on the established drilling specific energy formula, the energy analysis method is used to predict the formation structure and compressive strength, and the corresponding prediction formula is given. The research results show that, compared with the single drilling parameter prediction method, the rock-soil structure and strength identification method based on energy theory has higher prediction accuracy and can meet engineering needs.

scholarly journals Effect of Utilitarian Benefit on Green Brand Equity with Green Brand Image

2019 ◽  
Vol 23 (2) ◽  
pp. 306
Author(s):  
Ian Nurpatria Suryawan
Keyword(s):  
Brand Equity ◽  
Brand Loyalty ◽  
Mineral Water ◽  
Brand Image ◽  
Environmentally Friendly ◽  
Environmental Damage ◽  
Environment Friendly ◽  
Men And Women ◽  
Safe Environment ◽  
Positive Effect

The concept of Green Brand Equity (GBE) is a benchmark in determining the degree of value accumulated by green brands based on the function of green products. Many people use mineral water that is taken directly from the packaging and realize to use environmentally friendly mineral water packaging. The packaging must be easily recycled. Results shows Utilitarian Benefit (UB) has a positive effect on Green Brand Equity (GBE) mediated by Green Brand Image (GBI) based on Gender, which men and women have almost concerning for environment friendly packaging. The reason is the environment damage such as environmental pollution includes water pollution, air pollution, environmental damage eg.forest damage, erosion that causes flooding, damage to coral reefs to global warming. The effectiveness of Green Brand Equity (GBE) enhance Green Brand Image (GBI) and brand loyalty including insight environmentally friendly packaging is important to keep the safe environment

scholarly journals Renewable Energy Consumption and Economic Growth in Asia Pacific

2021 ◽  
Author(s):  
Pisi Bethania Titalessy
Keyword(s):  
Economic Growth ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Alternative Energy ◽  
Panel Data Analysis ◽  
Environmentally Friendly ◽  
Asia Pacific ◽  
Environmental Damage ◽  
Renewable Energy Consumption ◽  
The Impact

The problem of climate change is increasingly global and results in environmental damage due to the use of fossil energy in human activities. An increasing population will make energy consumption increase and can make things worse. Therefore, it is necessary to replace old energy with alternative energy that is more environmentally friendly and makes productivity effective and efficient. Renewable energy is pointed out as an alternative energy source that is environmentally friendly and the process is sustainable because it is always available in nature. Renewable energy is expected to increase the country's national income. This study aims to analyze the impact of renewable energy on economic growth in the Asia Pacific region as a whole. By using data from 2000-2015, panel data analysis in this study shows that Renewable Energy Consumption (REC) has a negative and significant relationship to economic growth, while renewable energy and combustible waste (CRW) has a significant and positive effect on economic growth.

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