Diffuser une alerte aux crues rapides via une application smartphone en France. De la théorie à la mise en pratique.

This paper aims at developing a new Smartphone application to further assess the actual warning system to face to flash floods occurring in France in small basins (of less than 50 km²). We mainly discuss in this paper of the condition of the establishment of a new system using the reactiveness of Smartphones. We hope 1) to reduce the time required for warnings and protect population; 2) to enhance data collection provided by citizens since local scales; 3) to built a collaborative vigilance and a standing guard network based on these citizens-sensors not depending on the official government systems; 4) to improve knowledge on flash floods damage observed in real-time. The solution is thought in the way to limit drawbacks between the classical approach (top-down) that imposed the government as a main warning source, and the citizens (bottom-up) we consider as sensors during crisis (both in going up 50 ISI. Volume 21 – n° 4/2016 or disseminating warning information). Addressing this is of paramount importance if we aim at minimizing material u0026 human damages regarding the high acuity of flash floods.