River dune dynamics in regulated rivers

Suzanne J.M.H. Hulscher, R.J. Daggenvoorde, Jord Jurriaan Warmink, K. Vermeer, Olav van Duin

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Abstract

The river bed of lowland rivers typically consists of river dunes. These dunes are the major source of roughness for the river flow and so, changes in their dimensions affects the roughness significantly. During floods these dunes grow in length and height. Numerical model studies and laboratory experiments have shown that for extreme discharges these dunes will wash out, i.e upper stage plain bed (USPB), decreasing the water level. In this study we investigate at which
locations along the river Rhine, flattening of the dunes or USPB are most likely to occur, using the data-based relationship found by Naqshband et al. (2014a). The flood hydrodynamics is generated by WAQUA. Next, we will apply the steplength approach of van Duin et al (2017) to model this transitions on river scale and assess the water level reduction. Potentially, this USPB may lead to a self-regulation process in rivers decreasing water levels at the extreme discharges which may occur due to climate changes.
Original languageEnglish
Pages1-4
Publication statusPublished - 28 Jun 2017
Event4th International Symposium on Shallow Flows, ISSF 2017 - Eindhoven University of Technology, Eindhoven, Netherlands
Duration: 26 Jun 201728 Jun 2017
Conference number: 4
http://issf2017.tue.nl/
http://issf2017.tue.nl/program/programme_ISSF.pdf

Conference

Conference4th International Symposium on Shallow Flows, ISSF 2017
Abbreviated titleISSF 2017
CountryNetherlands
CityEindhoven
Period26/06/1728/06/17
Internet address

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