FLOOD RISK ASSESSMENT IN RIVER TIMIS BASIN - THE CARANSEBES - LUGOJ SECTOR- USING GIS TECHNIQUE
MIHAI VALENTIN HERBEI1, LOREDANA COPĂCEAN1, SILVICA
ONCIA1
1Banat University of Agricultural Sciences and Veterinary Medicine, Faculty of Agriculture, Calea Aradului Street, no. 119, 300645 Timisoara, Romania, mihai_herbei@yahoo.com
Abstract: Flood risk assessment in Timis River basin - the Caransebes -Lugoj
sector- using GIS technique. Over time freshets, thus floods constituted and
constitute a particularly important issue that requires attention. In many
cases, flood damages are extensive to the environment, to the economy and also
socially. The purpose of this paper is to identify flood-prone areas between
Caransebes and Lugoj, land that is part of the Timis river basin. This paper is
based on a theoretical model in which we considered the building elements of the
flood produced on the Timis river in April 2005 (levels and flows). to represent
the zones flood – prone, we used the numerical model of the terrain, created for
the abovementioned area. On this model , according to levels measured at
hydrometric stations, were defined those flood prone areas. The Timis river
hydrographic basin includes a varied terrain (mountains, hills and plains), with
pronounced differences in altitude and massiveness, resulting from tectonic
movements that have affected the region, this fact has affected water flow
processes, both directly through fragmentation and slope, and indirectly, by
creating the vertical climate, vegetation and soils zones. Using GIS technology
to study hydrological phenomena and their impact on the geographic area are of
particular importance due to the complexity of these techniques, which enables
detailed analysis and analytical precision as well as an increased speed of the
analysis. Creating theoretical models that give scale to the hydrological
phenomena, in this case representing the flood areas, is of great practical
importance because based on these models the areas can be defined and viewed,
having the possibility of taking measures to prevent environmental effects on
the natural and / or anthropogenic environment. In the studied area review of
the flood of 2005, were represented flood areas, therefore, according with the
researches, several villages, located in Timis valley or in the low lands, where
the landscape decreases in altitude, were partially affected, also transport
infrastructure (roads and railways) was covered by water in some areas,
resulting in the isolation of villages; agricultural land located near or within
the localities were flooded, situation that had negative consequences on their
productivity. The data presented in this study support the importance and
opportunity of using GIS techniques in the evaluation of the hydrological risk
assessment, techniques through which tackling the problems that address the
geographic area is of a global importance, thus giving clear indications to
prevent and protect against destructive phenomena.
Key-words: assessment, risk, flood, technique
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