洪灾损失评估系统的研究开发及应用

我国是世界上洪涝灾害多发频发的国家之一,每次大的洪涝灾害都造成了巨大的经济损失。开展洪涝灾害损失评估对防洪减灾具有重要意义。本文在对洪灾损失评估方法进行研究的基础上,建立地物空间叠加分析和洪灾损失评估模型,在GIS平台上集成土地利用、社会经济和洪水淹没数据,开发完成独立的洪灾损失评估系统,实现了受淹对象分析和损失评估的通用功能,可实时地对洪水淹没范围内人口和资产的受淹及损失情况进行快速而精细的评估。并在杭嘉湖区(沪)开展了应用实例研究,与实测调查统计数据对比结果表明:利用本文模型和方法评估的洪灾损失与实际相符,开发的相关系统具有较好的推广应用价值,能够为防洪减灾决策提供技术支撑。

Development and application of flood damage assessment system

China is one of the countries with frequent floods and disasters in the world. Every major flood disaster event has caused huge economic losses. Conducting flood damage assessment is of great significance for flood control and disaster mitigation. Based on the in-depth study of the flood damage assessment method, this paper establishes a vector-grid spatial-overlap analysis and flood damage assessment model, integrates land use, socio-economic and flood inundation data on the GIS platform, and develops an independent flood damage assessment system. A common function of flood inundated object analysis and damage assessment is implemented to quickly and in real time assess the inundated population and assets within the flooded area. The application case study was carried out in part of Hangzhou-Jiaxing-Huzhou area in Shanghai region. The comparison with the measured data shows that the flood damages assessed by the model and method are consistent with the actual situation. The related systems developed have better value of popularization and application and could provide technical support for flood control and disaster reduction decision making.