Water potential of the subsurface water difficult area based on the geological conditions of Pajangan District, Bantul Regency, Yogyakarta, Indonesia

2021 ◽  
Author(s):  
Wisnu Aji Dwi Kristanto ◽  
Mohammad Abdul Khafid
Keyword(s):  
Water Potential ◽  
Subsurface Water ◽  
Geological Conditions ◽  
Difficult Area

Enhanced Geothermal Systems Projects and its Potential for Carbon Storage

2013 ◽  
Vol 732-733 ◽  
pp. 109-115 ◽  
Author(s):  
Chao Yin Feng
Keyword(s):  
Carbon Dioxide ◽  
Power Plants ◽  
Subsurface Water ◽  
Working Fluid ◽  
Low Permeability ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Geothermal Fields ◽  
Geological Conditions ◽  
Geothermal Wells

Enhanced Geothermal Systems represent a series of technology, which use engineering methods to improve the performance of geothermal power plant. In some geothermal fields, the rocks are in high temperature but a low permeability, or the subsurface water is scarce. In these geological conditions, cool water was injected into the geothermal wells to fracture the tight rock and create man-made reservoir for thermal exploitation. Furthermore, these engineering methods can be utilized to improve the productivity of pre-existing hydrothermal power plants. To save water and treat the global warming, using carbon dioxide instead of water as working fluid was proposed. Numerical simulation reveals that the carbon dioxide has numerous advantages over water as working fluid in the heat mining process. The precipitation caused by carbon dioxide will restore part of carbon dioxide in the rock and reduce the micro-seismicity risk.

scholarly journals HYDRO GEOLOGICAL CONDITIONS OF DOIRANI LAKE BASIN. EXTERIOR INTERFERENCES AND RESULTS

2004 ◽  
Vol 36 (4) ◽  
pp. 1982
Author(s):  
Γ. Δημόπουλος ◽  
Β. Μπαρούτη
Keyword(s):  
Water Balance ◽  
Subsurface Water ◽  
Lake Basin ◽  
Quaternary Deposits ◽  
Geological Conditions ◽  
Hydraulic Conditions ◽  
Balance Deficit

In this paper the hydro geological conditions of the quaternary deposits of Doirani lake basin are represented. The surface and subsurface water balance for the years 1988-1990 are also calculated.During the period 1985-1998 decline of 3,77 m of the lake's level has been noticed. The fact that the lake does not appear to have any sign of restoration leads to many questions regarding to its existence, water balance, hydraulic conditions of the basin and the groundwater overexploretion Analyzing the available hydrological, geological, lithological data a water balance deficit of 101.23*106 m3 /year for the period 1988-1990 is calculated resulted from the groundwater overexploretion. At the same time the loss of water due to the decline of the lake's level have reached the amounts of 90.58*106 m3 /year.

scholarly journals Drainage Pattern at Kaligesing Area, Purworejo District, Central Java

2021 ◽  
Vol 232 ◽  
pp. 03014
Author(s):  
T. Listyani R.A. ◽  
Ev. Budiadi
Keyword(s):  
Water Resources ◽  
Rural Development ◽  
Water Potential ◽  
Flow Characteristics ◽  
Hard Water ◽  
Research Area ◽  
Water Area ◽  
Drainage Pattern ◽  
Geological Structures ◽  
Geological Conditions

The Kaligesing area is part of the western part of the West Progo Dome. As the hard water area, water resources should be important problem to support rural development. The characteristics of the drainage as an indicator of water resources potential need to be understood in order to assess water potential. This paper wants to describe drainage characteristics as one of potential water resources indicators. The sufficient water resource is important for rural development. Result of the research shows that geological conditions allow this area to have relatively little water potential, but surface water can develop through rock-controlled flow patterns and geological structures. The flow characteristics in the area show rectangular, sub dendritic, and trellis patterns. Rivers develop genetically with consequent and subsequent types. Based on the quantity of water, the rivers in the study area include the intermittent and ephemeral rivers. Meanwhile, based on tectonics these rivers can be classified as superimposed rivers, where geological structures facilitate the formation of rivers in the research area. The river order in the study area shows the order of 1 - 4. Meanwhile, the density of the river is 0.81 - 1.86 km/km2 with young to mature river stages.

Impact of Protective Barriers on Groundwater Quality

2017 ◽  
Author(s):  
Małgorzata E. Wysocka ◽  
Katarzyna Zabielska-Adamska
Keyword(s):  
Groundwater Quality ◽  
Rural Areas ◽  
Mineral Soil ◽  
Harmful Effect ◽  
Negative Influence ◽  
Subsurface Water ◽  
Monitoring Wells ◽  
Geological Conditions ◽  
Landfill Sites ◽  
Landfill Monitoring

The storage yard’s leak-proof protection should be achieved by means of independent protective barriers in the form of geological barriers, artificial sealing layers, mineral soil liners and covers, as well as sidewall sealing. Some years ago, construction and exploitation of landfill sites in Poland took place without any guidelines and legal regulations. Landfills, especially situated in rural areas, were quite often constructed directly on the grounds, e.g. in former aggregate excavations, without any protection. Examples of the municipal landfills, located in the sites of adverse geological conditions were presented in this paper. The effect of existence or absence of geological barriers on the groundwater quality was carried out. In tested landfills, higher concentrations of groundwater pollution indicators were found in landfill monitoring wells located on the outlet of these waters, in comparison to the landfill monitoring wells located on their supply. In the case of the landfills situated directly on the soils of high hydraulic conductivity, the indicators of negative influence of deposited landfills increased even after the closing of the landfill sites. Subsurface water-bearing layer is a kind of “indicator” giving information about the harmful effect of landfills on the environment, and the need to take remedial actions.

Subsurface water flow detection by time-lapse reflection GPR data

2020 ◽  
Author(s):  
Hemin Yuan ◽  
Majken Caroline Looms Zibar ◽  
Lars Nielsen
Keyword(s):  
Water Flow ◽  
Ground Penetrating Radar ◽  
Water Injection ◽  
Time Lapse ◽  
Water Infiltration ◽  
Subsurface Water ◽  
Integrated Analysis ◽  
Injection Hole ◽  
Geological Conditions ◽  
Ground Penetrating

<p>Understanding subsurface water flow is important as it e.g. controls contaminant transport, has an impact on the amount of aquifer recharge, and can be used for storm water management purposes. However, there do not exist many methods that can observe the water flow in the field. Furthermore, the flow patterns can be very diverse due to the complex geological conditions, e.g. faults, fractures, and heterogeneous permeability of the subsurface formations. In order to map the subsurface water flow in a chalk formation, we performed a water injection experiment in the Rørdal Quarry, Northeast Denmark. A total water volume of 700 liters was injected via a 50 cm deep hole within 8 hours. Around the injection hole, we conducted time-lapse GPR measurements along 6 inlines and 6 crosslines. Seven measurements campaigns were performed over an eight-hour time period. We analyze the time-lapse GPR reflection sections in order to investigate the variations of the different measurements. Initially, we subtract the repeated measurements and baseline measurements, which shows that some survey lines have clear changes after water injection, while others only show very small or no changes. To verify the differences, we pick travel times of selected horizons in the time-lapse data and compare them (cf. Truss et al., 2007; Allroggen et al., 2015). This analysis highlights the travel time variations imposed by the injected water. Moreover, we perform correlation analysis of the measurements before and after water injection. The correlation coefficients show relatively small values on the lines that exhibit clear differences, further confirming the differences caused by the water infiltration. Initial integrated analysis of the different results shows that the water mainly flows towards the southeast from the injection hole. This is consistent with the orientation of the fracture system observed in the reflection GPR profiles, indicating that the water flow is primarily controlled by the fractures.</p><p> </p><p>[1] Truss, S., Grasmueck, M., Vega, S., and Viggiano, D. A. 2007, Imaging rainfall drainage within the Miami oolitic limestone using high-resolution time-lapse ground-penetrating radar, Water Recourses Research, 43, W03405.</p><p>[2] Allroggen, N., Schaik, N.V., and Tronicke, J. 2015, 4D ground-penetrating radar during a plot scale dye tracer experiment, Journal of Applied Geophysics, 118, 139-144.</p>

ANALISIS KESTABILAN LERENG DINDING AKHIR DI PIT BARATLAUT PADA PENAMBANGAN BATUBARA DI PT. PUTERA BARA MITRA , KECAMATAN MENTEWE, KALIMANTAN SELATAN

KURVATEK ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 21-34
Author(s):  
Untung Wahyudi ◽  
Excelsior T P ◽  
Luthfi Wahyudi
Keyword(s):  
Slope Stability ◽  
Mining Operation ◽  
Subsurface Water ◽  
Mining System ◽  
Mine Site ◽  
Analysis And Design ◽  
The Stability ◽  
End Wall ◽  
Wall Slope ◽  
Mining Slope

PT. Putera Bara Mitra used open mining system for mining operation, Yet the completion of study on the end wall slope stability that  undertaken by geotechnical PT. Putera Bara Mitra in Northwest Pit and the occured a failure in the low wall on the 1st June 2012 led to the need for analysis and design the overall slope at the mine site. To analyze and design the overall slope, used value of the recommended minimum safety. The value was based on company for single slope SF ≥ 1.2 and SF ≥ 1.3 for overall slope. The calculation used Bichop method with the help of software slide v 5.0. Geometry improvements was done at the low slopes that originally single wall with a 30 m bench height and a slope 70° with SF = 0.781, into 4 levels with SF = 1.305. The analysis explained the factors that affect the stability of the low wall included the mining slope geometry, unfavorable drainase system, material stockpiles and seismicity factors. It was necessary to do prevention efforts to maintain the stability of the slope included the redesign to slope geometry, handling surface and subsurface water in a way to control slopes draining groundwater, vegetation stabilization using and monitoring slope using Total Station with Prism and Crackmeter to determine the movement of cracks visible on the surface. 

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