Application of time-series analyses to the hydrological functioning of an Alpine karstic system: the case of Bange-L'Eau-Morte

T. Mathevet (1) , Michel Lepiller (2) , Alain Mangin (3)

1 CEMAGREF - Centre national du machinisme agricole, du génie rural, des eaux et forêts
2 ISTO - Institut des Sciences de la Terre d'Orléans
3 LEH - Laboratoire d'écologie des hydrosystèmes

This paper analyses the hydrological functioning of the Bange-L'Eau-Morte karstic system using classical and original techniques, recession curves, correlation and spectral analyses, noise analysis and wavelet analyses. The main characteristics that can be deduced are the recession coefficients, the dynamic volume of storage, the response time of the system, the quickflow and baseflow components and the snowmelt characteristics. The non-stationary and timescale-dependent behaviour of the system is studied and particular features of the runoff are shown. The step-by-step use of these different techniques provides a general methodology applicable to different karstic systems to provide quantifiable and objective criteria for differentiation and comparison of karstic systems.

Keywords: karstic hydrology, Bauges mountains, recession curves, correlation and spectral analysis, wavelet analysis, snowmelt

Domaines: Interfaces continentales, environnement; Milieux et Changements globaux; Océan, Atmosphère; Sciences de la Terre

T. Mathevet, Michel Lepiller, Alain Mangin. Application of time-series analyses to the hydrological functioning of an Alpine karstic system: the case of Bange-L'Eau-Morte. Hydrology and Earth System Sciences Discussions, 2004, 8 (6), pp.1051-1064. ⟨hal-00330862⟩