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Titre du document / Document title

Overbank flow depth prediction in alluvial compound channels

Auteur(s) / Author(s)

KARAMISHEVA R. D. (1) ; LYNESS J. F. (1) ; MYERS W. R. C. (1) ; CASSELLS J. B. C. (1) ; O'SULLIVAN J. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) School of the Built Environment, University of Ulster, Newtownabbey, ROYAUME-UNI

Résumé / Abstract

Algorithms based on simple one-dimensional stage-discharge models for compound channels have been developed and tested for overbank flow data from the UK Flood Channel Facility and the University of Ulster channel with straight and meandering planforms. The proposed divided resistance approach takes into account the grain resistance, the bed form resistance and the roughness characteristics of the floodplain but it was found to give unsatisfactory prediction of the flow depth for compound channels with rough floodplains. A simple algorithm for stage-discharge prediction based on a lumped resistance approach was then proposed. It requires calibration of the overbank Manning n for a relative depth zero and a coefficient of proportionality, and this is achievable if measurements of the flow depth and velocity are taken for at least three overbank flow discharges. The application of the lumped approach to various flume and field data showed good agreement between the measured and predicted flow depths.

Revue / Journal Title

Water management    ISSN  1741-7589 

Source / Source

2006, vol. 159, no3, pp. 195-205 [11 page(s) (article)] (41 ref.)

Langue / Language

Anglais

Editeur / Publisher

Telford, London, ROYAUME-UNI  (2004) (Revue)

Mots-clés anglais / English Keywords

Rivers

;

Depth

;

Resistance

;

Flow measurement

;

Sensitivity analysis

;

Measurement result

;

Discharge

;

Experimental study

;

Flood

;

One dimensional model

;

Forecast model

;

Stream

;

Hydraulics

;

Mots-clés français / French Keywords

Rivière

;

Profondeur

;

Résistance

;

Mesure débit écoulement

;

Analyse sensibilité

;

Résultat mesure

;

Décharge

;

Etude expérimentale

;

Inondation

;

Modèle 1 dimension

;

Modèle prévision

;

Cours eau

;

Hydraulique

;

Mots-clés espagnols / Spanish Keywords

Río

;

Profundidad

;

Resistencia

;

Medida caudal flujo

;

Análisis sensibilidad

;

Resultado medición

;

Descarga

;

Estudio experimental

;

Inundación

;

Modelo 1 dimensión

;

Modelo previsión

;

Curso agua

;

Hidraúlica

;

Localisation / Location

INIST-CNRS, Cote INIST : 6862 J1, 35400013345955.0070

Nº notice refdoc (ud4) : 18013823



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