Parent Layer: Hydrology

Name: Aquifer

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Description: Recharge areas were delineated for the principal aquifers of densely populated basins and valleys of Utah for implementation of state and county groundwater protection plans. This data was compiled from multiple studies and sources. Some data was modified from the original to provide a dataset with consistent scale and attributes. For original data please contact the Utah Geological Survey or the USGS (cited in credits).Bedrock Recharge - Anderson and others (1994) chose not to differentiate between bedrock and aluvial fill when delineating the primary discharge zone while the UGS studies only evaluated the alluvial aquifers making the assumption that potential for contamination in the bedrock aquifers and recharge zones is generally high. We added a bedrock class to the results of the Anderson study to create a more consistent dataset. Bedrock areas are generally considered to occupy the primary recharge zone but may locally discharge large amounts of water at springs or seeps.Primary Recharge - Basin or valley-fill area with a significant downward groundwater gradient lacking confining layers thicker than 20 feet. Secondary Recharge - Basin or valley-fill area with a downward groundwater gradient with a confining layer thicker than 20 feet.Discharge -Basin or valley-fill area where the groundwater gradient is upward. Discharge in unconfined aquifers are areas of springs and seeps. Discharge in confined aquifers will dishcharge into the overlying unconfined aquifer or to a spring or flowing well.

Copyright Text: Various studies by the Utah Geological Survey and Utah Division of Water Quality (801) 537-3300 Anderson, P., Susong, D., Wold, S., Heilweil, V, and Baskin, R., 1994, Hydrolgeology of recharge areas and water quality of the principal aquifers along the Wasatch Front and Adjacent Areas, Utah, Water-Resources Investigations Report 93-4221, United States Geological Survey,

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