Temporal estimation of hydrodynamic parameter variability in stormwater constructed wetlands – The hysteresis effect during multi-rainfall events - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Ecological Engineering Année : 2019

Temporal estimation of hydrodynamic parameter variability in stormwater constructed wetlands – The hysteresis effect during multi-rainfall events

Résumé

Constructed wetland (CW) systems are increasingly implemented as rustic water treatment facilities, the efficiency of which varies with time due to possible malfunctions such as clogging related to excessive loads of suspended solids or inadequate CW sizing. A numerical flow modeling can be used to evaluate filtering performance and to improve the design of CWs. Such a modeling usually involves the so-called van Genuchten-Mualem (vGM) soil hydrodynamic parameters which are notoriously difficult to measure. The meticulous attention brought to the sensitivity of the model to the vGM parameters reveals a predominant influence of the shape parameters and the saturated conductivity of the filter on the piezometric heads, during feeding and drainage. We then discuss a simple, robust and low-cost inverse modeling approach, deterministic and stochastic, for the identification of the soil hydrodynamic properties from piezometric heads measured during successive storm events. The temporal variability of hydrodynamic parameters is assessed and analyzed with regards to modeling efficiency. Principal component analysis shows that the estimated hydrodynamic parameters from the feeding and drainage sub-periods are significantly different.
Fichier principal
Vignette du fichier
HALmanuscript (1).pdf (920.11 Ko) Télécharger le fichier
Loading...

Dates et versions

hal-02322819 , version 1 (25-10-2019)

Identifiants

Citer

Mohammad Moezzibadi, Isabelle Charpentier, Adrien Wanko, Robert Mosé. Temporal estimation of hydrodynamic parameter variability in stormwater constructed wetlands – The hysteresis effect during multi-rainfall events. Ecological Engineering, 2019, 127, pp.1-10. ⟨10.1016/j.ecoleng.2018.11.002⟩. ⟨hal-02322819⟩
28 Consultations
251 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More