Flow patterns and sediment deposition in rectangular shallow reservoirs

flow patterns; rectangular shallow reservoirs; sediment deposition; reservoir sedimentation; trapping efficiency; flow stability; sédimentation; réservoirs; stabilité d'écoulements

Abstract :

[en] This work involves the experimental investigation of flow patterns, preferential regions of deposition and trapping efficiency in rectangular shallow reservoirs. The main flow patterns that can be encountered in rectangular shallow reservoirs are described: symmetrical flows without any reattachment point (S0), asymmetrical flows with one reattachment point (A1), and asymmetrical flows with two reattachment points (A2). The influence of geometrical and hydraulic parameters on reattachment lengths is intensively investigated. A shape parameter is introduced to classify symmetrical and asymmetrical flows. For each flow pattern, the preferential regions of deposition are studied. To conclude, a number of practical recommendations are given. Reservoirs with a shape parameter lower than 6.2 limit sediment deposition. Reservoirs with a shape parameter greater than 6.8 are favourable for sediment deposition. Finally, perspectives for maximizing and minimizing deposition are given, respectively by exploiting the great trapping potential of the flow pattern A1 and the poor trapping potential of the flow pattern S0.

Research Center/Unit :

Aquapôle - ULiège

Disciplines :

Civil engineering

Author, co-author :

Dufresne, Matthieu

Dewals, Benjamin ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydraulics in Environmental and Civil Engineering

Erpicum, Sébastien ; Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)

Archambeau, Pierre ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)

Pirotton, Michel ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)

Language :

English

Title :

Flow patterns and sediment deposition in rectangular shallow reservoirs

Alternative titles :

[fr] Modes d'écoulement et dépôts de sédiments dans des réservoirs rectangulaires peu profonds

Publication date :

28 February 2012

Journal title :

Water and Environment Journal

ISSN :

1747-6585

Publisher :

Blackwell Publishing

Volume :

Issue :

Pages :

504-510

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://onlinelibrary.wiley.com/doi/10.1111/j.1747-6593.2012.00310.x/abstract

Available on ORBi :

since 06 February 2012

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