Skip to Main content Skip to Navigation
Theses

Fonctionnement hydraulique des nappes superficielles de fonds de vallées en interaction avec le réseau hydrographique

Abstract : The main objective of this PhD Thesis is to contribute to a better understanding of the functioning of shallow water-tables drained by a ditch or a stream in humid riparian zones. This should help developing models adapted to improve the management of these zones. The choice has been made to use "1 D-saturated class" models (Boussinesq equation), and more sophisticated models (Laplace, Richards) in order to verify and discuss the main assumed simplifications. Some particular boundary conditions have been studied: (i) water-table recharge heterogeneity; (ii) seepage face phenomenon; (iii) water-table reaching soil surface; (ij) downstream transient condition (free water level). Experiments have been carried out on a physical model in laboratory (MASHyNS apparatus) and at the field scale (Ru de Cétrais watershed, Loire Atlantique). A Boussinesq-based model (SIDRA 2+) has been used and adapted to the various boundary conditions previously cited. This model has been calibrated and validated from field-measurements. The water-table level has been predicted with a very good accuracy at different distances from the ditch.
Keywords : thesis
Document type :
Theses
Complete list of metadata

https://hal.inrae.fr/tel-02580470
Contributor : Migration Irstea Publications Connect in order to contact the contributor
Submitted on : Thursday, May 14, 2020 - 8:25:46 PM
Last modification on : Thursday, December 30, 2021 - 3:18:56 PM

Identifiers

  • HAL Id : tel-02580470, version 1
  • IRSTEA : PUB00010195

Collections

Citation

C. Kao. Fonctionnement hydraulique des nappes superficielles de fonds de vallées en interaction avec le réseau hydrographique. Sciences de l'environnement. Doctorat Sciences de l'eau, ENGREF, Paris, 2002. Français. ⟨tel-02580470⟩

Share

Metrics

Record views

8