Risk Flood Areas, A Study Case:
Basilicata Region
Author(s)
A. Sole, L. Giosa & V. Copertino
Abstract
Recent hydrological events have increased both public interest and that of the
Scientific Community in a more accurate study of flooding areas. The aim of this
work is to define the inundation risk along the main rivers of the Basilicata
Region in order to create flooded area maps for different flow rates
corresponding to different return periods. Three different software programs
have been used for hydrodynamic simulation: Hec Ras (River Analysis System)
produced by United States Army Corps of Engineers River Analysis System and
developed by the Hydrologic Engineering Center, Mike 11 produced by the
Danish Hydraulic Institute, and Mike 21 bi-dimensional model produced by the
Danish Hydraulic Institute to compare the different behaviour of the models and
evaluate the most suitable. The simulations have been carried out on more than
1500 river cross sections to define the geometric characteristics of streams. Peak
flows with 30 year, 200 year and 500 year return periods have been considered
as upstream boundary conditions, and for the bi-dimensional simulations data
was surveyed with laser scanning techniques. The integration of hydrodynamic
models and very detailed data, such as laser scanning data, is very difficult and
requires a great deal of pre-processing. Here we have put forward a method of
integration. The water surface elevation and top width achieved in riverbeds for
each simulation has been used with GIS software to draw the different flooded
area maps.
Keywords: risk flood, hydrodynamic mono and bi-dimensional models, laser
scanning techniques.
Keywords
risk flood, hydrodynamic mono and bi-dimensional models, laser
scanning techniques.
Related Book
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