Time domain electromagnetic survey for assisting in determining the groundwater resources on property located in the South Kohala District above Kawaihae, Hawaii
Time domain electromagnetic survey for assisting in determining the groundwater resources on property located in the South Kohala District above Kawaihae, Hawaii
Date
2011-08
Authors
Nance, Tom
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Tom Nance Water Resource Engineering
Zapata Inc.
Zapata Inc.
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Abstract
"This report contains the procedures and results of surface Time Domain Electromagnetic (TDEM) geophysical surveys performed for groundwater resource evaluation on property located in the South Kohala District above the town of Kawaihae, Hawaii. The project site included land located both north and east of the junction of Highway 19 and Kawaihae Road toward the town of Kamuela and along the Kohala Mountain Road toward Hawi. Zapata Incorporated (ZAPATA) performed the surveys for Queen Emma Land Company (QELC) and Tom Nance Water Resource Engineering (TNWRE) from July 20 through July 29, 2011.
The main objective of the TDEM surveys was to explore for basal or high-level groundwater on the property. The surveys were conducted at seventeen TDEM sounding sites to help determine the location for future groundwater wells.
TDEM is a geophysical method that determines from the surface the geoelectric section (resistivity layering) of the subsurface. From the geoelectric section, information about geology and water quality can be inferred. This is possible because the electrical resistivity of the earth depends on lithology, porosity, degree of saturation, and concentration of dissolved solids in the groundwater. Geophysical surveys, combined with other hydrogeologic information, are used to provide optimum locations for water well placement and well completion depths."
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Keywords
groundwater,
TDEM,
Kawaihae,
South Kohala,
Kohala,
Big Island,
Hawaii,
Geology--Hawaii,
Groundwater--Hawaii,
Water-supply--Hawaii,
Geology,
Groundwater,
Water-supply
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30 pages
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