Prévision de grandeurs hydrologiques par les méthodes de convolution

Dominique Thiéry (1)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

The concept of the unit hydrograph which is questionable and disputed may be adapted to the continuous simulation of river and spring discharges. Similarly it is possible to define the concept of 'unit limnigraph' which describes the variations of the level of an aquifer recharged by a unit infiltration. Knowing the past sequence of infiltration it is then possible to compute the future evolution of the water level according to different scenarios of forecast infiltration. As the aquifer inertia is often very large, it is then possible to predict the water level as much as six months ahead. Combining a unit hydrograph and a unit limnigraph a convolution relationship of water level-spring discharge or spring discharge-water level may be derived. In this case the forecast may be carried out faster and more precisely because it is not necessary to compute the infiltration on the hydrological basin.

Domaines: Hydrologie; Milieux et Changements globaux

Dominique Thiéry. Prévision de grandeurs hydrologiques par les méthodes de convolution. Oxford Symposium : Hydrological forecasting, Apr 1980, Oxford, Royaume-Uni. pp.325-332. ⟨hal-01070991⟩