The effect of land-use change on the flood frequency curve (FFC) in a natural catchment is analysed. To achieve this, a simple methodology for the derivation of FFCs in land-use change scenarios is proposed. The adopted methodology, using a stochastic model in Monte Carlo simulation of FFCs, was found to provide a useful framework for detecting changes in flood magnitudes in both pre- and post-fire conditions. In particular, the importance of the antecedent soil moisture condition in the determination of the flood frequency distribution was analysed. The analysis of FFCs for pre- and post-fire conditions shows an increase in the average value of Curve Number and a decrease in the catchment time lag. The derivation of FFCs shows a clear increase in flood quantiles. For the post-fire conditions, the FFC exhibits higher quantiles of the peak discharges showing a reduction in frequency of occurrence. This variation is more significant for low-return period quantiles than for high-return period quantiles. The results of the catchment studies reported here support the hypothesis that the hydrological response of the watershed changes as a result of fire, especially during the first years following a fire event.
|Data di pubblicazione:||2005|
|Titolo:||Effects of fires on flood frequency curves in a Mediterranean catchment|
|Autori:||CANDELA A; ARONICA GT; SANTORO M|
|Tipologia:||Articolo su rivista|
|Citazione:||CANDELA A, ARONICA GT, & SANTORO M (2005). Effects of fires on flood frequency curves in a Mediterranean catchment. JOURNAL OF HYDROLOGICAL SCIENCES, 50 (2), 193-206.|
|Appare nelle tipologie:||01 - Articolo su rivista|