Flood propagation Case Study
Work has been conducted in order to:
a) Identify a suitable real flood scenario including urban
affections and collection of appropriate field data for model
validation
b) Model set up and validation
As regards the first issue several actual
floods in urban scenarios were investigated as possible case
studies for model validation. Identification and collection
of data of enough quality in order to set up an appropriate
city flooding case study proved however difficult.
After exploring data available for several
candidate cities (Nîmes, France 1988, Florence, Italy
1966, Estes Park, Co, USA 1982, Sumacárcer, Spain 1982)
a decision was made in favour of the catastrophic flooding
of the town of Sumacárcer (See
photo) after Tous dam break (See
photo) for its particular characteristics, well tailored
to the Impact project spirit, and relatively good data availability.
The flooding of the town of Sumacárcer is a typical
example of a great intensity, extreme flood. Further to the
data availability the Tous case encompasses both flood propagation
along natural topography (the Júcar river valley) (See
image) and subsequent inundation of an urban area, what
matches well Impact projects objectives.
The Tous dam break event started after extremely
heavy rains in the Valencia region (Spain), and consisted
of failure of a loose material dam by overtopping, propagation
of a strong flood wave along a river reach and then flooding
of the town of Sumacárcer (plus many other towns downstream).
Within Flood Propagation theme area, the Tous case will be
used as a case study for both Urban flooding and Flood propagation
in natural topographies simultaneously. It is intended to
model (See
image) the propagation of the flood from the dam and its
impact onto the town of Sumacárcel altogether.
Other work areas of Impact project will
also be involved in the analysis of the Tous event, in particular
Breach formation.
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