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iDEA: Drexel E-repository and Archives > Drexel Academic Community > College of Engineering > Department of Civil, Architectural,and Environmental Engineering > Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] > Flow resistance in saltmarsh and mangrove vegetation in an Australian coastal wetland

Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/1440

Title: Flow resistance in saltmarsh and mangrove vegetation in an Australian coastal wetland
Authors: Howe, Alice
Rodríguez, José
Keywords: Field observations;Flow measurements;Experimental hydraulics
Issue Date: 12-Sep-2006
Publisher: Michael Piasecki and College of Engineering, Drexel University
Citation: Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732
Abstract: Flow in estuarine wetlands is typically shallow, unsteady and non-uniform. Vegetation within these wetlands is emergent under most flow conditions, and vegetation drag is the main component of flow resistance. In adjacent tidal creeks, however, the substrate is typically devoid of vegetation and bed roughness is the major resistance component. A number of formulations have been presented for calculation of resistance due to bed roughness; however, few have been tested in low energy estuarine environments. In order to test the applicability of these approaches to field conditions, measurements using acoustic Doppler velocimeters were conducted in a wetland in the Hunter estuary, southeast Australia. Vegetation at the field site was comprised of two species of saltmarsh (Sarcocornia quinqueflora and Sporobolus virginicus) and one species of mangrove (Avicennia marina). Unvegetated tidal creek substrates occurred in both the mangrove and saltmarsh habitats. Stem density of mangroves in the field was comparable to previous laboratory studies; saltmarsh stem density was substantially higher and varied with depth of inundation. Field results allowed for the development of resistance relations for each vegetation type and for fully turbulent flow over unvegetated substrates. Resistance of unvegetated substrates under transitional flow conditions was not well characterized using the applied formulations.
Description: Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE) hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization.
URI: http://hdl.handle.net/1860/1440
ISBN: 0977447405
Appears in Collections:Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]

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