Skip to Main content Skip to Navigation
Conference papers

River Flow 2020 Estimation of the transverse mixing coefficients in shallow gravel-bedded rivers

Abstract : Transverse mixing coefficients are key parameters for predicting pollutant dispersion in rivers. While most studies deal with river reaches considered homogeneous, the literature review indi-cates that shallow, gravel-bedded rivers with a longitudinally-varied bed morphology are still poorly documented. The motivation of the present work is that the transverse mixing coeffi-cient in rivers with varied hydraulic parameters could be estimated with a succession of coeffi-cients of more homogeneous sub-reaches. This work applies a 1D-diffusion model to estimate these local transverse mixing coefficients from several local injections. Slug injections of Rho-damine WT are performed at various locations of the Durance River, France. Cross-profiles of tracer concentration at selected cross-sections delineating as homogeneous as possible sub-reaches are measured using fluorometers located near the bed. In addition, hydraulic data are derived from ADCP measurements. Best-fitting solutions of the 1D-diffusion model against the measurements suggest substantial variations of the transverse mixing coefficient between con-secutive sub-reaches.
Keywords : River mixing
Complete list of metadatas

Cited literature [7 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-02972575
Contributor : Bibliothèque Cadarache <>
Submitted on : Tuesday, October 20, 2020 - 2:59:53 PM
Last modification on : Thursday, October 22, 2020 - 3:29:41 AM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2021-04-20

Please log in to resquest access to the document

Identifiers

  • HAL Id : cea-02972575, version 1

Collections

CEA | DEN | INRAE

Citation

L. Gond, E. Mignot, J. Le Coz, L. Kateb. River Flow 2020 Estimation of the transverse mixing coefficients in shallow gravel-bedded rivers. RIVERFLOW 2020 - 10th Conference on Fluvial Hydraulics, IAHR (International Association for Hydro-Environment Engineering and Research), Jul 2020, DELFT, Netherlands. ⟨cea-02972575⟩

Share

Metrics

Record views

5