scholarly journals Delineation of Fractured Aquifer Using Numerical Analysis (Factor) of Resistivity Data in a Granite Terrain

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Rolland Andrade
Keyword(s):  
Hard Rock ◽  
Numerical Approach ◽  
Groundwater Exploration ◽  
Fractured Aquifer ◽  
Hard Rock Terrain ◽  
Groundwater Availability ◽  
Fractured Aquifers ◽  
Electrical Sounding ◽  
Groundwater Source ◽  
Granite Terrain

In hard rock terrain, fractured aquifers comprise the major source of groundwater availability where the phreatic aquifer is desaturated. Identification of fracture zones in hard rock terrain and potential groundwater source delineation had been a perennial problem in hydrology. The purpose of this paper is to highlight the study over a small watershed area, in a granite terrain, wherein an attempt was made to delineate and map the fractured aquifer using numerical (factor) analysis of the conventional vertical electrical sounding data, which was obscure in curve matching technique. This numerical approach in concatenation with resistivity imaging or other techniques would prove to be an effective tool in groundwater exploration.

scholarly journals Use of Earth Observation Images and GIS Techniques for Groundwater Exploration in Hard Rock Terrain

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
P. MOHANA ◽  
S Muthusamy
Keyword(s):  
Remote Sensing ◽  
Water Resources ◽  
Ground Water ◽  
Hard Rock ◽  
Groundwater Potential ◽  
Groundwater Exploration ◽  
Scientific Data ◽  
Srtm Dem ◽  
Regional Patterns ◽  
Hard Rock Terrain

Prolonged drought and improper maintenance of water resources increased the demands on ground-water supplies resulting are focuses for the need to evaluate ground-water resources in the hard rock terrain. In recent years, Remote-Sensing methods have been increasingly recognized as a means of obtaining crucial geo-scientific data for both regional and site-specific investigations. This work aims to develop and apply integrated methods combining the information obtained by geo-hydrological field mapping and those obtained by analyzing multi-source remotely sensed data in a GIS environment for better understanding the Groundwater condition in hard rock terrain. In this study, digitally enhanced Landsat ETM+ data was used to extract information on geology, geomorphology. Hill-Shading techniques are applied to SRTM DEM data to enhance terrain perspective views and to extract Geomorphological features and morphologically defined structures through the means of lineament analysis. A combination of Spectral information from Landsat ETM+ data plus spatial information from SRTM-DEM data is used to address the groundwater potential of alluvium, colluvium and fractured crystalline rocks in study area. The spatial distribution of groundwater potential zones shows regional patterns related to lithologies, lineaments, drainage systems and landforms. High yielding wells and springs are often related to large lineaments and corresponding structural features such as dykes. The results demonstrate that the integration of remote sensing, GIS, traditional fieldwork and models provide a powerful tool in the assessment and management of water resources and development of groundwater exploration plans.

scholarly journals EVALUATION Of GROUNDWATER VULNERABILITY IN FRACTURED AQUIFER USING GEOELECTRIC LAYER SUSCEPTIBILITY INDEX AT OJU, SOUTHERN BENUE TROUGH NIGERIA

2020 ◽  
Vol 4 (2) ◽  
pp. 63-67
Author(s):  
M. O. Eyankware ◽  
A. O. I. Selemo ◽  
P.N. Obasi ◽  
O. M Nweke
Keyword(s):  
Groundwater Contamination ◽  
Groundwater Vulnerability ◽  
Aquifer Vulnerability ◽  
Fractured Aquifer ◽  
Benue Trough ◽  
Longitudinal Conductance ◽  
Fractured Aquifers ◽  
Groundwater Occurrence ◽  
Electrical Sounding ◽  
Geoelectric Layer

A combination of geoelectric and hydrogeologic concept was used in the assessment of groundwater vulnerability in fractured aquifers of Oju and environs. The study area is underlain by the sediments of the Asu River Group, Southern Benue Trough Nigeria. A total of twenty-seven (27) Vertical Electrical Sounding (VES) was carried out within the study area. Geoelectric parameters (layer, resistivity and thickness) of the overlying layers across the study area were determined and used to evaluate the vulnerability of the underlying aquifers. Three charts were compared using geo-electrically derived models; LC (Longitudinal Conductance), GLSI (geoelectric layer susceptibility indexing) and GOD (groundwater occurrence, overlying lithology and depth to the aquifer. Results obtained from LC revealed that the study area fell within the moderate category, GLSI showed that aquifer vulnerability were categorize within negligible to low category and GOD fell within low to moderate category. On the average, groundwater within the study area is considered moderate vulnerable to groundwater contamination.

scholarly journals Use of earth observation images and GIS techniques for groundwater exploration in hard rock terrain

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
P. MOHANA ◽  
S. Muthusamy
Keyword(s):  
Remote Sensing ◽  
Water Resources ◽  
Ground Water ◽  
Hard Rock ◽  
Groundwater Potential ◽  
Groundwater Exploration ◽  
Scientific Data ◽  
Srtm Dem ◽  
Regional Patterns ◽  
Hard Rock Terrain

Prolonged drought and improper maintenance of water resources increased the demands on ground-water supplies resulting are focuses for the need to evaluate ground-water resources in the hard rock terrain. In recent years, Remote-Sensing methods have been increasingly recognized as a means of obtaining crucial geo-scientific data for both regional and site-specific investigations. This work aims to develop and apply integrated methods combining the information obtained by geo-hydrological field mapping and those obtained by analyzing multi-source remotely sensed data in a GIS environment for better understanding the Groundwater condition in hard rock terrain. In this study, digitally enhanced Landsat ETM+ data was used to extract information on geology, geomorphology. Hill-Shading techniques are applied to SRTM DEM data to enhance terrain perspective views and to extract Geomorphological features and morphologically defined structures through the means of lineament analysis. A combination of Spectral information from Landsat ETM+ data plus spatial information from SRTM-DEM data is used to address the groundwater potential of alluvium, colluvium and fractured crystalline rocks in study area. The spatial distribution of groundwater potential zones shows regional patterns related to lithologies, lineaments, drainage systems and landforms. High yielding wells and springs are often related to large lineaments and corresponding structural features such as dykes. The results demonstrate that the integration of remote sensing, GIS, traditional fieldwork and models provide a powerful tool in the assessment and management of water resources and development of groundwater exploration plans.

Characterization of weathering profile and quality of groundwater over hard rock terrain

2021 ◽  
Vol 14 (3) ◽  
Author(s):  
Rajan Girija Rejith ◽  
Mayappan Sundararajan ◽  
Balu Gowtham ◽  
Ayyappan Balasubramanian ◽  
Joseph Francis Lawrence
Keyword(s):  
Hard Rock ◽  
Weathering Profile ◽  
Hard Rock Terrain
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