@article{fdi:010092113,
  title = {{U}nraveling flood dynamics at sub-daily time scales in semi-arid to arid basins in south {M}orocco},
  author = {{R}achdane, {M}. and {S}aidi, {M}. {E}. and {E}l {K}halki, {E}. and {H}adri, {A}. and {B}oughdadi, {S}. and {N}ehmadou, {M}. and {A}hbari, {A}. and {T}ramblay, {Y}ves},
  editor = {},
  language = {{ENG}},
  abstract = {{F}loods are posing significant threats but also play a crucial role in recharging groundwater and surface water storage in arid and semiarid regions. {T}o improve flood knowledge in these areas, this study in {S}outh {M}orocco considers hourly river discharge records from 20 basins, with sparse vegetation or bare land and sandy soils, to identify over 1000 flood events. {S}everal flood event characteristics were computed: peak discharge, rising time, flood volume, and duration. {T}he seasonal frequency, trends, and the characteristics of different types of flood events were analyzed using a peaks-over-thresholds sampling. {R}esults indicated that floods are mostly observed during the wettest months, from {S}eptember to {F}ebruary depending on the basins, but also in summer with comparable magnitudes, demonstrating the high variability in these regions. {N}o significant trends in flood characteristics over time have been detected. {A}n envelope curve that relates unit peak discharge and net runoff volume to catchment areas has been developed for this region. {E}xamining climatic and physiographic factors, the catchment area and topographic wetness index ({TWI}) were strongly correlated with peak discharge, but on the opposite no relationships were found with antecedent soil moisture conditions prior to floods. {T}here is a majority of flash-floods (34%) with rising times less than 5 h. {W}hile two-thirds of episodes have rising time less than 10 h, these floods also have a greater magnitude on average. {C}omputing flood quantiles with daily data can be highly biased in these basins, underestimating flood quantiles by a factor of 2 or beyond, indicating the need for instantaneous data to analyze floods in semi-arid and arid basins. {T}hese findings provide insights for better water resource management, flood control strategies and infrastructure design in this type of basins.},
  keywords = {{S}aharan {M}orocco ; {F}lood characterization ; {F}lood seasonality ; {F}lood frequency analysis ; {F}lood trends ; {MAROC} ; {SAHARA} ; {ZONE} {SEMIARIDE} ; {ZONE} {ARIDE}},
  booktitle = {},
  journal = {{N}atural {H}azards},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[21 p.]},
  ISSN = {0921-030{X}},
  year = {2024},
  DOI = {10.1007/s11069-024-07022-0},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092113},
}