IWRA World Water Congress 2008 Montpellier France
1. Water availability, use and management
Author(s): Vincent Bailly-
Comte
Hervé Jourde
Séverin Pistre
Laboratoire HydroSciences
Montpellier
Maison des Sciences de l’Eau, UM2, Montpellier – France
Keyword(s): karst, subterranean hydrodynamics, transfer functions, flash flood
Article: PDFAbstractThis work aims at assessing
rainfall/runoff and runoff/runoff relationships in a karst watershed. Rain gauges and gauging stations allow estimating
River flow which reaches and leaves the karst aquifer. Correlation analyses are firstly used to describe rainfall/runoff
transfer functions upstream and downstream from the karst aquifer. Then, correlation and spectral analyses applied
to a runoff/runoff relationship are used to understand how flood waves in the River are modified through the karst
aquifer. It is shown that frequency response is a suitable data analysis tool which highlights various processes
occurring on different time scale: surface flow routing, exceeding of the infiltration rate of the karst drainage network
and karst contribution to surface flows.