Flood Risk Modelling With LiDAR Technology
Author(s)
A. Sole, L. Giosa, L. Nolè, V. Medina & A. Bateman
Abstract
Floods are one of the most serious, common and costly natural disasters that
many countries are facing. Climate change and growing urban areas have
dramatically increased the frequency and the severity of flood events. This has
enhanced the interest of the Scientific Community and of public institutions into
creating more accurate studies regarding the delineation of possible flood areas.
In mountain and hill areas, it is much easier to mark the flood areas even with a
one-dimensional scheme, while in lowlands the accurate delimitation of flood
areas becomes much more difficult requiring a more detailed description of the
territory. In particular, the definition of flood areas in coastal zones is extremely
difficult because of the small changes in the land surface elevation and because
of the presence of manmade structures that may significantly modify flood
distribution. The area of study is the Ionian coastal plain of the Basilicata region
(Southern Italy) crossed by five of the six main rivers of the region (Bradano,
Basento, Cavone, Agri and Sinni). This work aims to: analyze the capacity of
LaserScan data for the description of coastal morphology and to model flood risk
areas; define a DTM able to describe the channel and floodplain morphology
working on high resolution laser altimetry data and topographic data; define the
most effective strategy for the delineation of flood areas using the comparison of
the one dimensional model (Hec-Ras developed by the Hydrologic Engineering
Center of USACE) versus the two dimensional scheme (MIKE 21 HD by the
Danish Hydraulic Institute, FLO-2D by O’Brien (FLO-2D User Manual.
Version 2007.06), FLATModel by Medina et al. (Application of FLATModel, a
2D finite volume code, to debris flows in the northeastern part of Iberian
Peninsula, Landslides, Springer Verlag Editor, 2007)).
Keywords: topographic LiDAR data, hydrodynamic modeling, high resolution
DEM.
Keywords
topographic LiDAR data, hydrodynamic modeling, high resolution
DEM.
Related Book
Other papers in this volume
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