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Classifying the water table at regional to continental scales
SMHI, Research Department, Hydrology.
2011 (English)In: Geophysical Research Letters, ISSN 0094-8276, Vol. 38, L05401Article in journal (Refereed) Published
Abstract [en]

Water tables at regional to continental scales can be classified into two distinct types: recharge-controlled water tables that are largely disconnected from topography and topography-controlled water tables that are closely tied to topography. We use geomatic synthesis of hydrologic, geologic and topographic data sets to quantify and map water-table type over the contiguous United States using a dimensionless criterion introduced by Haitjema and Mitchell-Bruker (2005), called the water-table ratio, which differentiates water-table type. Our analysis indicates that specific regions of the United States have broadly contiguous and characteristic water-table types. Water-table ratio relates to water-table depth and the potential for regional groundwater flow. In regions with recharge-controlled water tables, for example the Southwest or Rocky Mountains, USA, water-tables depths are generally greater and more variable and regional groundwater flow is generally more important as a percentage of the watershed budget. Water-table depths are generally shallow and less variable, and regional groundwater flow is limited in areas with topography-controlled water tables such as the Northeast USA. The water-table ratio is a simple but powerful criterion for evaluating regional groundwater systems over broad areas. Citation: Gleeson, T., L. Marklund, L. Smith, and A. H. Manning (2011), Classifying the water table at regional to continental scales, Geophys. Res. Lett., 38, L05401, doi: 10.1029/2010GL046427.

Place, publisher, year, edition, pages
2011. Vol. 38, L05401
National Category
Oceanography, Hydrology, Water Resources
Research subject
Hydrology
Identifiers
URN: urn:nbn:se:smhi:diva-531DOI: 10.1029/2010GL046427ISI: 000288087200001OAI: oai:DiVA.org:smhi-531DiVA: diva2:805464
Available from: 2015-04-15 Created: 2015-04-15 Last updated: 2015-04-15Bibliographically approved

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