test_moissonnage_selune
type: Agent

Study of riverbank stability subjected to tide variation
type: Dataset
contact point: Organization
  fn: CCSD
keyword: methode-des-tranches
keyword: soil-erosion
keyword: base-flow
keyword: glissement
keyword: maree
keyword: abaques
keyword: water-table
keyword: theses
keyword: spiotherengineering-sciences-physicsother
keyword: infoeu-reposemanticsdoctoralthesis
landing page: https://theses.hal.science/tel-00957294
description: The riverbanks, subjected to seasonal flooding and tidal variation, are submitted to landslides causing property damage and sometimes human victims. The presented work is conducted to analyze the riverbank stability subjected to the tide variation by considering the influence of external and internal water flows on the bank soil. More particularly, we consider the effect of ground water variation on the soil pore pressure. The Dupuit’s flow model is adopted to find the variation of the ground water table. A method of slices is developed to calculate the safety factor of riverbank slides as a function of tide. Parametric studies of the effect of bank geometry, hydromechanical soil properties and the characteristics of tide variation are then presented. Then the bank surface erosion is simulated by different methods and coupled with the calculation of landslide. Finally, case studies at Mont-Saint-Michel bay and on the lower Mekong riverbank are conducted.The comparison between simulations and field measurements of ground water table during the tide variation let us conclude that the Dupuit’s flow model can be adopted for homogeneous and isotropic soils. However, the mode is less accurate for more complex media, such as multilayered soils. The tide has a significant effect on the pore pressure in the soil, which creates damping and delayed phase phenomena with respect to the tide.Slide safety factors vary as a function of tide and they are minimal during the falling of water level before low tide due to the delay of the ground water table and the slowing down of the speed of the tide. Charts of safety factor have been proposed providing the security domains based on various soil parameters, bank geometry and tide variation. These charts also allow calculation of the safety factor by linear interpolation.When the bank is submerged for a time period long enough, the failure surface is located in the upper part of the bank and occurs at high tide. This failure mode is al…
identifier: NNT: 2013ISAR0032
issued: 2026-05-06T02:30:17.577620
language: fr
modified: 2026-05-06T02:30:17.577625

Study of riverbank stability subjected to tide variation
type: Distribution
access URL: https://theses.hal.science/tel-00957294
format: HTML
issued: 2026-05-06T02:30:17.581796
modified: 2026-05-06T02:30:17.564168