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首页> 外文期刊>Pure and Applied Geophysics >The Use of Geospatial Technologies in Flood Hazard Mapping and Assessment: Case Study from River Evros
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The Use of Geospatial Technologies in Flood Hazard Mapping and Assessment: Case Study from River Evros

机译：利用地理空间技术在洪水危害映射和评估中的应用 - 河流河赛事案例研究

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Many scientists link climate change to the increase of the extreme weather phenomena frequency, which combined with land use changes often lead to disasters with severe social and economic effects. Especially floods as a consequence of heavy rainfall can put vulnerable human and natural systems such as transboundary wetlands at risk. In order to meet the European Directive 2007/60/EC requirements for the development of flood risk management plans, the flood hazard map of Evros transboundary watershed was produced after a grid-based GIS modelling method that aggregates the main factors related to the development of floods: topography, land use, geology, slope, flow accumulation and rainfall intensity. The verification of this tool was achieved through the comparison between the produced hazard map and the inundation maps derived from the supervised classification of Landsat 5 and 7 satellite imageries of four flood events that took place at Evros delta proximity, a wetland of international importance. The comparison of the modelled output (high and very high flood hazard areas) with the extent of the inundated areas as mapped from the satellite data indicated the satisfactory performance of the model. Furthermore, the vulnerability of each land use against the flood events was examined. Geographically Weighted Regression has also been applied between the final flood hazard map and the major factors in order to ascertain their contribution to flood events. The results accredited the existence of a strong relationship between land uses and flood hazard indicating the flood susceptibility of the lowlands and agricultural land. A dynamic transboundary flood hazard management plan should be developed in order to meet the Flood Directive requirements for adequate and coordinated mitigation practices to reduce flood risk.
机译：许多科学家将气候变化与极端天气现象频率的增加，这与土地利用变化相结合往往导致具有严重的社会和经济影响的灾害。特别是洪水的洪水，降雨量可以将脆弱的人类和自然系统（如跨界湿地）放在风险上。为了满足欧洲指令2007/60/60 / EC要求洪水风险管理计划的发展，在基于网格的GIS建模方法后，生产了EVROS越境流域的洪水危险地图，这些方法汇总了与发展有关的主要因素洪水：地形，土地利用，地质，坡，流量积累和降雨强度。通过对沃尔斯特拉·近距离发生的四个洪水事件的监督分类，通过产生的危险地图和淹没的卫星成像，核实映射来实现该工具的验证。与卫星数据映射的云区范围的建模输出（高和非常高洪水危险区域）的比较表明了模型的令人满意的性能。此外，检查了对洪水事件的每种土地利用的脆弱性。在最终洪水危险地图和主要因素之间也应用了地理加权回归，以确定他们对洪水事件的贡献。结果认证了土地利用与洪水危害之间存在巨大关系，表明低地和农业土地的洪水易感性。应制定动态跨界洪水危险管理计划，以满足足够和协调的缓解措施的洪水指示要求，以减少洪水风险。

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