TY - JOUR
T1 - Toward an operational approach for the characterization and modelling of fine sediments dynamics in reservoirs
AU - Peteuil, Christophe
AU - Jodeau, Magali
AU - De Linares, Matthieu
AU - Valette, Eric
AU - Alliau, Damien
AU - Wirz, Carole
AU - Fretaud, Thierry
AU - Antoine, Germain
AU - Sécher, Matthieu
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2018.
PY - 2018/9/5
Y1 - 2018/9/5
N2 - Achieving a sustainable management of sediment fluxes in existing or proposed reservoirs is a challenging but essential requirement for dam operators. Such objective is of utmost importance to avoid sedimentation-related consequences. Numerical modelling is of great interest to understand the flow and sediment dynamics in a reservoir, to simulate the long-term evolution of sediment deposits and to evaluate the efficiency of various management strategies. This paper presents recent case studies, which validate the feasibility and relevancy of such technical option. The progresses obtained on essential stages of the numerical modelling of sediments dynamics in reservoirs are particularly emphasized. Concerning the distribution of deposits, a promising field method based on an optimum combination of direct samplings with acoustic measurements and video auscultations is detailed. Feedbacks are then provided concerning an innovative device deployed in the field for a direct measurement of the settling velocity. Issues about the assessment of calibration parameters are also addressed in this communication. Lab experiments performed on deposits sampled in several reservoirs provide practical guidance to evaluate the erosion parameters of sediments. Finally, several examples of sediment dynamics modelling in reservoirs including both cohesive and non-cohesive sediment are presented.
AB - Achieving a sustainable management of sediment fluxes in existing or proposed reservoirs is a challenging but essential requirement for dam operators. Such objective is of utmost importance to avoid sedimentation-related consequences. Numerical modelling is of great interest to understand the flow and sediment dynamics in a reservoir, to simulate the long-term evolution of sediment deposits and to evaluate the efficiency of various management strategies. This paper presents recent case studies, which validate the feasibility and relevancy of such technical option. The progresses obtained on essential stages of the numerical modelling of sediments dynamics in reservoirs are particularly emphasized. Concerning the distribution of deposits, a promising field method based on an optimum combination of direct samplings with acoustic measurements and video auscultations is detailed. Feedbacks are then provided concerning an innovative device deployed in the field for a direct measurement of the settling velocity. Issues about the assessment of calibration parameters are also addressed in this communication. Lab experiments performed on deposits sampled in several reservoirs provide practical guidance to evaluate the erosion parameters of sediments. Finally, several examples of sediment dynamics modelling in reservoirs including both cohesive and non-cohesive sediment are presented.
UR - https://www.scopus.com/pages/publications/85053813712
U2 - 10.1051/e3sconf/20184003028
DO - 10.1051/e3sconf/20184003028
M3 - Conference article
AN - SCOPUS:85053813712
SN - 2267-1242
VL - 40
JO - E3S Web of Conferences
JF - E3S Web of Conferences
M1 - 03028
T2 - 9th International Conference on Fluvial Hydraulics, River Flow 2018
Y2 - 5 September 2018 through 8 September 2018
ER -