北江大堤洪水风险信息管理系统研究

Research on Flood Risk Information Management System of Beijiang River Levee

以北江大堤保护范围作为研究区域,将洪水风险分析技术与GIS技术相结合,应用洪水仿真模型描述洪水的泛滥过程及水情风险特征,勾画出不同洪水频率下最大可能淹没范围,表述淹没水深、流速、历时、到达时间等风险指标的空间分布,刻划风险区内部风险程度的空间差异;应用GIS技术,叠加必要的社会经济与基础工程信息,采用GIS电子地图多层叠加方式,制作和表述洪水风险图;进而应用洪水风险图,完成风险信息查询、灾害评估以及抢险与避难方案的设计等,并形成一套完整的风险管理与决策支持应用系统。

Combining flood risk analysis method with GIS technology,the flood simulation model was applied on the flood protection area of Beijiang River levee to describe the flood process and characteristics,and the maximum possible submerge range was drawn out synchronously.The spatial distribution of the submerge depth,flow velocity,period,reach time and other risk indexes were also sketched to express the spatial differences in the flood protection area.A flood risk map was drawn based on the GIS,swing in with social and economic information and fundamental project information.The flood risk map was used in risk information inquiring,flood evaluation,design of emergency and refuge plan to form an integrated system of risk management and decision-making.