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Overbank sand deposition in relation to transport volumes during large‐magnitude floods in the Dutch sand‐bed Rhine river system
Author(s) -
Ten Brinke Wilfried B. M.,
Schoor Margriet M.,
Sorber Anne M.,
Berendsen Henk J. A.
Publication year - 1998
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/(sici)1096-9837(199809)23:9<809::aid-esp890>3.0.co;2-1
Subject(s) - overbank , geology , deposition (geology) , hydrology (agriculture) , river bed , magnitude (astronomy) , geotechnical engineering , floodplain , geomorphology , fluvial , geography , sediment , physics , cartography , structural basin , astronomy
Using aerial photographs and field measurements, sandy overbank deposits formed by the large‐magnitude floods of 1993/94 and 1995 were quantified along two branches of the Dutch Rhine river system: the Waal (1993/94 and 1995) and the IJssel (1995). These deposits were laid down intermittently all along the length of these rivers on the top and landward slope of the natural levees, and covered about 4 per cent of the embanked floodplain on the Waal and about 1 per cent on the IJssel. The overbanks and transport mechanism is basically convective by nature. The spatial variability of overbank sedimentation points to the important role played by helicoidal currents in determining overbank deposition. The presence of embankments and training works appears to influence the sand transport to and morphological development of the floodplains along the Dutch Rhine river system. Overbank deposition volumes about equal present estimates of sand transport during a large‐magnitude flood. It appears that studies on sand transport in the Dutch Rhine carried out so far underestimate sand transport during floods. © 1998 John Wiley & Sons, Ltd.