Dataset: Cross-channel geometry of Groves Creek salt marsh, Skidaway Island Georgia, USA, Aug. 2013 to March 2015

Preliminary and in progressVersion 1 (2021-03-17)Dataset Type:model results

Principal Investigator: William Savidge (Skidaway Institute of Oceanography)

Co-Principal Investigator: Jay Brandes (Skidaway Institute of Oceanography)

Co-Principal Investigator: Catherine Edwards (Skidaway Institute of Oceanography)

Co-Principal Investigator: Aron Stubbins (Skidaway Institute of Oceanography)

BCO-DMO Data Manager: Nancy Copley (Woods Hole Oceanographic Institution)


Project: Tempo and mode of salt marsh exchange (GrovesCreek)


Abstract

This dataset includes cross-channel geometry data, associated with ADP data, that were extracted from the complete digital elevation model for the Groves Creek marsh (C. Alexander SkIO), see Supplemental Files section.

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Channel geometry was determined from high resolution RTK GPS digital elevation data obtained by Dr. C. Alexander at Skidaway Institute.  The Groves Creek digital elevation model has been described in Sullivan et al. 2015 & 2019.  To obtain channel profiles, a transect normal to the channel and intersecting the ADP deployment location was established, and the NAVD88 elevations at 0.5-1m intervals along that transect were then estimated from the elevation data set.

Transect endpoints were determined visually from maps.  Data shown in bold in the original Excel file (see Data Files section) have been arbitrarily assigned to ensure that the trapezoids obtained for integration of total cross sectional area have a flat top.

This dataset was extracted from the complete digital elevation model for the Groves Creek marsh by C. Alexander (SkIO) [see Supplemental Files], where single-beam data was collected during 23 survey missions between 2010 and 2011 from a small shallow draft electric boat around high tide using an Ohmex Sonarmite echosounder with RTK-GPS positioning. Pedestrian RTK-GPS survey data was collected across the low gradient marsh platforms, creek levees, and throughout creeks found to be too small or shallow for the survey boat. Pedestrian data was acquired during times around low tide using Trimble R6 GPS receivers with RTK correction data obtained through a Virtual Reference System. Location is reported as 31.96667, -81.01667.


Related Datasets

IsSupplementTo

Dataset: Groves Creek: ADP current profiles
Savidge, W., Stubbins, A., Edwards, C., Brandes, J. (2017) Tidal water velocities in Groves Creek salt marsh, Skidaway Island Georgia, USA, 2013-2014. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2017-02-22 http://lod.bco-dmo.org/id/dataset/682783

Related Publications

Methods

Sullivan, J. C., Torres, R., & Garrett, A. (2019). Intertidal Creeks and Overmarsh Circulation in a Small Salt Marsh Basin. Journal of Geophysical Research: Earth Surface, 124(2), 447–463. doi:10.1029/2018jf004861
Methods

Sullivan, J. C., Torres, R., Garrett, A., Blanton, J., Alexander, C., Robinson, M., … Hayes, D. (2015). Complexity in salt marsh circulation for a semienclosed basin. Journal of Geophysical Research: Earth Surface, 120(10), 1973–1989. doi:10.1002/2014jf003365
Related Research

Alexander, C. R., Hodgson, J. Y. S., & Brandes, J. A. (2017). Sedimentary processes and products in a mesotidal salt marsh environment: insights from Groves Creek, Georgia. Geo-Marine Letters, 37(4), 345–359. doi:10.1007/s00367-017-0499-1