Importance of Submarine Groundwater Discharge (SGWD) and Seawater Cycling to Material Flux across Sediment Water Interfaces in Marine Environments

Simple item page
dc.contributorVirginia Tech. Department of Biologyen
dc.contributor.authorSimmons, George M. Jr.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessed2016-02-01en
dc.date.accessioned2016-02-28T22:29:52Zen
dc.date.available2016-02-28T22:29:52Zen
dc.date.issued1992en
dc.description.abstractThe movement of water across sediment/water interfaces is very important to the ecology of aquatic habitats. Submarine groundwater discharge (SGWD) occurs primarily by advective flow and may be due to a variety of factors. In nearshore marine environments, the major factor is probably groundwater flow from upland regions. In oceanic environments, SGWD is probably influenced more by tides and surge action. SGWD, therefore, represents various mixtures of fresh groundwater and seawater. This paper summarizes the first regional study of SGWD and its attendant solutes in shallow estuarine, continental shelf and coral reef habitats, and calls attention to the magnitude of water volumes which appear to be circulating through marine sediments. Data on SGWD from sites in the Florida Keys and on the southeastern continental shelf of the U.S. indicate that water movement across sediment/water interfaces is a common occurrence at least to water depths of 30 to 35 m. Discharge values from the Florida Keys were 8.9 l m-2 d-1 (N congruent-to 344) for depths < 27 m and 5.4 l m-2 d-1 (N congruent-to 261) for depths of ca 27 to 39 m. On the southeastern continental shelf, discharge ranged between ca 6 and 20 l m-2 d-1. One site was found in 20 m depth where there was a persistent negative hydraulic head and a mean influx of seawater to the sediments (ca 10.8 l m-2 d-1). Even though geohydrological models would predict coupling of SGWD with landbased hydraulic heads, definitive lower salinity SGWD could not be detected. The driving force seems to be subtidal pumping and much of the discharge measured was probably recycled seawater. This research also demonstrated that SGWD serves to move dissolved solutes into the water column, and could be an important link in benthic-pelagic coupling in continental shelf ecosystems.en
dc.description.sponsorshipNational Oceanic and Atmospheric Administrationen
dc.description.sponsorshipUniversity of North Carolina at Wilmington‏. National Undersea Research Centeren
dc.description.sponsorshipNational Oceanic and Atmospheric Administration. Sanctuary Programs Divisionen
dc.description.sponsorshipOrder No. NA84AAA03722en
dc.description.sponsorshipGeological Survey (U.S.). Water Resources Divisionen
dc.description.sponsorshipVirginia Tech. Department of Biologyen
dc.format.extent12 p.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationSimmons, G. M. (1992). Importance of Submarine Groundwater Discharge (SGWD) and Seawater Cycling to Material Flux across Sediment Water Interfaces in Marine Environment. Marine Ecology Progress Series, 84(2), 173-184. doi:10.3354/meps084173en
dc.identifier.doihttps://doi.org/10.3354/meps084173en
dc.identifier.issn0171-8630en
dc.identifier.otherm084p173.pdfen
dc.identifier.urihttp://hdl.handle.net/10919/64887en
dc.identifier.urlhttp://www.int-res.com/articles/meps/84/m084p173.pdfen
dc.identifier.volume84en
dc.language.isoen_USen
dc.publisherInter-Researchen
dc.rightsIn Copyrighten
dc.rights.holderInter-Researchen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectSeepage fluxen
dc.subjectExchangeen
dc.subjectLakesen
dc.subjectBayen
dc.titleImportance of Submarine Groundwater Discharge (SGWD) and Seawater Cycling to Material Flux across Sediment Water Interfaces in Marine Environmentsen
dc.title.serialMarine Ecology Progress Seriesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
m084p173.pdf
Size:
1.2 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Scholarly Works, Biological Sciences