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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Special sessions : A first phase in the habitat classification for the zeeschelde : bed form classification.
A first phase in the habitat classification for the zeeschelde : bed form classification.
Author : GWENDY R. VOS(1,2), YVES M. G. PLANCKE(1) & TATIANA MAXIMOVA(1)
ABSTRACT
Within the scope of the long term vision of the Schelde estuary and the Development Outline 2010 low dynamic intertidal
and shallow water areas are considered to be of high ecological value. These areas are in fact linked to eutrophic foraging
zones for birds and young fish and to refugees for tidal migrators. However, this assumption is based on experiences in
other areas and there is no evidence that all parts of the shallow water area are equally valuable. Little is known about the
occurrence of such valuable areas in the Schelde estuary, nor are the physical and morphological processes which
determine the occurrence of these areas fully understood.
Following research on this topic on the area near the Walsoorden Sandbar in the Westerschelde (the Netherlands) in
2008-2009, a new research project was defined to determine relationships between physical, sedimentological and
ecological characteristics in the Zeeschelde (Belgium) and to set up a classification of undeep subtidal and intertidal
areas.
A first step in the habitat classification comprised of a detailed analysis of 5 sub areas, each characteristic for a certain
salinity zone. The first phase of the analysis of the subareas consisted of an analysis of multibeam echo sounding data in
respect to the occurrence of bed forms, which resulted in a classification of each sub area in a limited amount of bed form
classes.
In a second phase a numerical hydrodynamic model was used to determine hydrodynamic characteristics for each of the
subareas. Based on the results of the first two phases, accordance between hydrodynamic and physical characteristics
was sought, but none could be found. However more insight was obtained about the range of bedform sizes and the
configuration of hydrodynamic zones. In a last phase data from the first two steps will be combined with ecological
parameters to try and find relationships and develop a map of the spatial variation of the ecological value for the different
sub areas.
File Size : 484,935 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Special sessions
Date Published : 12/08/2015
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