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(Article of periodic en Anglais - 2013)

Document title

Dissolution in a variably confined carbonate platform : effects of allogenic runoff, hydraulic damming of groundwater inputs, and surface–groundwater exchange at the basin scale

Authors(s) and Affiliation(s)

GULLEY J. (1) ; MARTIN J. (2) ; SPELLMAN P. (3) ; MOORE P. (2) ; SCREATON E. (2) ;
(1) Michigan Technological Univ., Dept. of Geological and Mining Engineering and Sciences, Houghton, ETATS-UNIS
(2) Dept. of Geological Sciences, Univ. of Florida, Gainesville, ETATS-UNIS
(3) Michigan Technological Univ., Dept. of Civil and Environmental Engineering, Houghton, ETATS-UNIS

Abstract

Gradient reversals cause flood waters to flow from rivers and conduits into the aquifer where they can dissolve limestone. The AA. used legacy data to assess how a gradient of aquifer confinement across the Suwannee River Basin, north-central Florida affected locations, magnitudes and processes of dissolution during 2005–2007, a period with extreme ranges of discharge. During intense rain events, runoff from the confining unit increased river stage above groundwater heads in unconfined portions of the platform, hydraulically damming inputs of groundwater along a 200 km reach of river. Hydraulic damming allowed allogenic runoff to fill the entire river channel and flow into the aquifer via reversing springs. Storage of runoff in the aquifer decreased peak river discharges downstream and contributed to dissolution within the aquifer. Post-depositional porosity in variably confined carbonate platforms should thus be enhanced along rivers that originate on confining units

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no14 [pp. 1700-1713]

Bibliographic references : 1 p.

Collation : 12 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3411

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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