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Analytical Model
Probability Distribution
Seasonality
Spatial Variability
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An analytical model of the effects of catchment elevation on the flood frequency distribution
An analytical model of the effects of catchment elevation on the flood frequency distribution,10.1029/2007WR006658,Water Resources Research,P. Allaman
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An analytical model of the effects of catchment elevation on the flood frequency distribution
(
Citations: 2
)
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P. Allamano
,
P. Claps
,
F. Laio
The effect of temperature on the flood frequency distribution in mountainous basins is examined through a minimalist analytical model. The conceptual hypothesis on which the model is grounded is the existence of a subtractive mechanism that reduces the basincontributing area in flood formation to the fraction of basin laying below the freezing elevation at the time of occurrence of each precipitation event. This fraction depends on the watershed hypsometric curve and on the seasonal evolution of temperatures. Under this hypothesis, the
probability distribution
of the annual maximum discharge is analytically derived, based on simple assumptions on the
stochastic process
of precipitation. The shape and the moments of this distribution explicitly relate to basin hypsometry and to the
seasonality
of temperatures. Qualitative results show that the simple causative mechanisms can explain the attenuation of flood quantiles in highelevation basins. Model application to 57 watersheds in the Northwestern Italian Alps effectively demonstrates the role of the hypsography in explaining the
spatial variability
of the mean of the flood distribution.
Journal:
Water Resources Research  WATER RESOUR RES
, vol. 45, no. 1, 2009
DOI:
10.1029/2007WR006658
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Citation Context
(1)
...Details on the analytical derivation of the flood frequency curves are provided by
Allamano et al. [2009]
...
P. Allamano
,
et al.
Global warming increases flood risk in mountainous areas
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Ataur Rahman
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Journal:
Journal of Hydrology  J HYDROL
, vol. 256, no. 3, pp. 196210, 2002
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Citations
(2)
Global warming increases flood risk in mountainous areas
(
Citations: 7
)
P. Allamano
,
P. Claps
,
F. Laio
Journal:
Geophysical Research Letters  GEOPHYS RES LETT
, vol. 36, no. 24, 2009
Global warming increases flood risk in mountainous areas
P. Allamano
,
P. Claps
,
F. Laio
Journal:
Geophysical Research Letters  GEOPHYS RES LETT
, vol. 36, no. 24, 2009