Forecasting soil erosion and sediment yields during flash floods: The disastrous case of Mandra, Greece, 2017

Abstract Flash floods, among the most destructive natural hazards, are commonly studied as to their catastrophic power in terms of fatalities, infrastructure damages and economic losses. A devastating aftermath flash which has not received much‐deserved attention literature, is sizeable permanent soil loss due erosion sediment yields. This study aims at forecasting yields disastrous storm event that occurred Mandra town (western Attica, Greece) on 15 November 2017. Gridded hydrometeorological forecasts were conducted 5‐min 1‐h time steps by means chemical hydrological atmospheric ocean wave system (CHAOS). The achieved a high‐resolution geographic information (GIS) application modified universal equation (MUSLE) basis forecasted surface runoff hydrographs. entire lasted from afternoon 14 until noon November, but bulk morning 2017, flooding two torrent basins. As result extreme flood, 2195 tons 1435 be detached body soil's transported stream networks Soures Agia Aikaterini Torrent basins cross Mandra. Soil maps constructed for every hour spatial temporal evolution was shown throughout event. provides concrete insights erosion‐prone areas basins, can inform actions against erosion.