<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Evelpidou, N.</style></author><author><style face="normal" font="default" size="100%">Polykreti, N.</style></author><author><style face="normal" font="default" size="100%">Karkani, A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Modelling Flood Risk. Example from Paratrechos stream (Naxos Island, Cyclades).</style></title><secondary-title><style face="normal" font="default" size="100%">SMARTeST Conference</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">27-28 September</style></date></pub-dates></dates><pub-location><style face="normal" font="default" size="100%">Athens, Greece</style></pub-location><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;div&gt;This study focuses on the estimation and management of flood risk in the drainage basin of Paratrechos or&amp;nbsp;Peritsi stream in Naxos Island, through the study of geomorphological characteristics, geology, land use and&amp;nbsp;topography.&lt;/div&gt;
&lt;div&gt;The catchment area of Paratrechos or Peritsi stream is approximately 54 km. High morphological relief&amp;nbsp;characterizes the mountainous areas and lowland areas present mild relief. The average elevation reaches 245 m,&amp;nbsp;while the average slope of the basin is 21%.&amp;nbsp;The stream is known to have caused severe problems following intense rainfall, with landslides in the&amp;nbsp;mountainous areas and subsidence in large parts of the road network, and with intense flooding events in the&amp;nbsp;wider area of Chora of Naxos. Several floods have been recorded for Paratrechos or Peritsi stream, with the most&amp;nbsp;recent at the end of March 1998, beginning of January 1999 and 18th February 2003.&amp;nbsp;The aim of this study is the investigation of the relationship rain-runoff through Unitary Hydrographs, in order&lt;/div&gt;
&lt;div&gt;to estimate and evaluate the flood potential of the hydrologic basin.&amp;nbsp;In order to obtain accurate results, the hydrologic basin was divided into sub-basins, based on the class of&amp;nbsp;each stream, and the characteristics of each sub-basin were studied. For the optimum application of the Clark&amp;nbsp;method, the data were enriched with field measurements, through the installation of a water level recorder and a&amp;nbsp;meteorological station. The results from the field measurements were used to confirm the results of the method.&amp;nbsp;Through this method, the maximum flow at the mouth of each sub-basin and the concentration time were&lt;/div&gt;
&lt;div&gt;calculated. Maps of flood risk were developed, with the use of ArcGis 9.3 software, presenting the characteristics&amp;nbsp;of the flood risk locations in the study area. Furthermore, Instantaneous Unitary Hydrographs were produced for&amp;nbsp;each sub-basin, in order to study and compare the relationship of rain-runoff and determine the causes of the risk.&amp;nbsp;The identification of these areas and the application of the method were accomplished through the study and use&amp;nbsp;of contours, elevation and trigonometric points, watersheds, land use, hydrographic network, soil characteristics,&amp;nbsp;geological characteristics and flood picks.&lt;/div&gt;</style></abstract></record></records></xml>