HR: 1340h
AN: H13C-0418    [Abstracts]
TI: Fire Forcing of Catchment Erosion in Burned Areas of Saint Gabriel Mountains, Southern California
AU: * Rulli, M
EM: cristina.rulli@polimi.it
AF: Politecnico di Milano, Piazza L. Da Vinci, 32, Milano, I-20133 Italy
AU: Rosso, R
EM: renzo.rosso@polimi.it
AF: Politecnico di Milano, Piazza L. Da Vinci, 32, Milano, I-20133 Italy
AB: A methodology to evaluate fire flood risk, connected to catchment erosion, in wildfires and high rainfall prone areas, by coupling deterministic and statistic analysis, is proposed. Accordingly, soil physical-chemical fire-induced changing, altering hydrological and sedimentological response, are kept in account via hydrological-sedimentological distributed model. Also, probability for assigned frequency of peak flows and sediment yields is estimated for different scenarios (i.e. burned and unburned). Application to 9 San Gabriel Mountains basins, shows this methodology able to describe a wide range of field measurements, collected in natural (pre-fire) and altered (post-fire) conditions. The method is also useful to give an explanation in the probability domain of the hydrological and sedimentological enhanced risk due to the presence of wildfires.
DE: 1809 Desertification
DE: 1815 Erosion and sedimentation
DE: 1821 Floods
DE: 1824 Geomorphology (1625)
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting