Etude des paramétrisations hydrologiques d'un modèle de surface continentale : importance des aquifères et des premiers centimètres du sol

Abstract : Land Surface Models (LSMs) were designed to compute the water and energy budgets at the land surface in climate models (general circulation models). Since the first bucket model of Manabe (1969), the representation of hydrological processes in LSMs has been considerably improved, so that last generation LSMs are now used as stand-alone hydrological models. This thesis deals with the hydrological parameterizations of such an LSM, namely the Catchment Land Surface Model (CLSM). The CLSM makes use of the topographic information to compute surface runoff, groundwater flow and subgrid distribution of soil moisture. Three applications of the CLSM are presented:

- an application to the Somme River basin (France), which allowed us to enhance the groundwater representation,
- an application to the moraine of the Zongo glacier (Bolivia), dedicated to the dependance of bare soil albedo on soil moisture,
- an application to West Africa, as part of the intercomparison project ALMIP (AMMA Land Surface Models Intercomparison project).

The diversity of these contexts shed the light on the strengths and weaknesses of the CLSM and allows a better understanding of the complex interplay between energy and water at the land surface. We show how important it is to take into account the top centimeters of soil and the aquifers.
Document type :
Theses
Complete list of metadatas

Cited literature [249 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00399672
Contributor : Simon Gascoin <>
Submitted on : Sunday, June 28, 2009 - 2:21:52 AM
Last modification on : Wednesday, May 15, 2019 - 3:37:54 AM
Long-term archiving on: Tuesday, June 15, 2010 - 7:00:46 PM

Identifiers

  • HAL Id : tel-00399672, version 1

Citation

Simon Gascoin. Etude des paramétrisations hydrologiques d'un modèle de surface continentale : importance des aquifères et des premiers centimètres du sol. Hydrologie. Université Pierre et Marie Curie - Paris VI, 2009. Français. ⟨tel-00399672⟩

Share

Metrics

Record views

534

Files downloads

6860