Document of bibliographic reference 216596

BibliographicReference record

Type
Bibliographic resource
Type of document
Journal article
BibLvlCode
AS
Title
Bio-geomorphic effects on tidal channel evolution: impact of vegetation establishment and tidal prism change
Abstract
The long-term (10–100 years) evolution of tidal channels is generally considered to interact with the bio-geomorphic evolution of the surrounding intertidal platform. Here we studied how the geometric properties of tidal channels (channel drainage density and channel width) change as (1) vegetation establishes on an initially bare intertidal platform and (2) sediment accretion on the intertidal platform leads to a reduction in the tidal prism (i.e. water volume that during a tidal cycle floods to and drains back from the intertidal platform). Based on a time series of aerial photographs and digital elevation models, we derived the channel geometric properties at different time steps during the evolution from an initially low-elevated bare tidal flat towards a high-elevated vegetated marsh. We found that vegetation establishment causes a marked increase in channel drainage density. This is explained as the friction exerted by patches of pioneer vegetation concentrates the flow in between the vegetation patches and promotes there the erosion of channels. Once vegetation has established, continued sediment accretion and tidal prism reduction do not result in significant further changes in channel drainage density and in channel widths. We hypothesize that this is explained by a partitioning of the tidal flow between concentrated channel flow, as long as the vegetation is not submerged, and more homogeneous sheet flow as the vegetation is deeply submerged. Hence, a reduction of the tidal prism due to sediment accretion on the intertidal platform, reduces especially the volume of sheet flow (which does not affect channel geometry), while the concentrated channel flow (i.e. the landscape forming volume of water) is not much affected by the tidal prism reduction.
WebOfScience code
https://www.webofscience.com/wos/woscc/full-record/WOS:000313981200002
Bibliographic citation
Vandenbruwaene, W.; Meire, P.; Temmerman, S.; Bouma, T.J. (2013). Bio-geomorphic effects on tidal channel evolution: impact of vegetation establishment and tidal prism change. Earth Surf. Process. Landforms 38(2): 122-132. https://dx.doi.org/10.1002/esp.3265
Topic
Brakish water
Is peer reviewed
true

Authors

author
Name
Wouter Vandenbruwaene
Identifier
https://orcid.org/0000-0003-3779-6076
Affiliation
Vlaamse overheid; Beleidsdomein Mobiliteit en Openbare Werken; Vlaams Ministerie Mobiliteit en Openbare Werken; Departement Mobiliteit en Openbare Werken; Waterbouwkundig Laboratorium
author
Name
Patrick Meire
Identifier
https://orcid.org/0000-0003-2599-5350
Affiliation
Universiteit Antwerpen; Faculteit Wetenschappen; Departement Biologie
author
Name
Stijn Temmerman
Identifier
https://orcid.org/0000-0003-3346-9115
Affiliation
Universiteit Antwerpen; Faculteit Wetenschappen; Departement Biologie
author
Name
Tjeerd Bouma
Identifier
https://orcid.org/0000-0001-7824-7546
Affiliation
Koninklijk Nederlands Instituut voor Onderzoek der Zee; NIOZ Yerseke; Afdeling Ruimtelijke Ecologie

Links

referenced creativework
type
DOI
accessURL
https://dx.doi.org/10.1002/esp.3265

Document metadata

date created
2012-07-04
date modified
2018-04-10