Monitoring Mediterranean flash-floods using an image-based method : a case study on the Ardèche watershed, France
Suivi des crues éclair en milieu méditerranéen à l'aide d'une méthode fondée sur l'imagerie : un cas d'étude sur le bassin de l'Ardèche, France
Résumé
Conventional stream gauging techniques are not adapted to flashflood measurement because: They are intrusive : high flow velocities and floating debris endanger the operators and the equipment. They are time consuming: the river level and discharge can significantly change during the measurement. They are expensive and labor intensive : they can not be included in a densely distributed hydrometry strategy We present a nonintrusive, imagebased method for monitoring rivers continuously and in realtime. The capability of LSPIV for measuring discharge during a flashflood on the Ardèche River is demonstrated.