Research and improvement on assessment method of flood hazard
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Abstract:
Flood risk analysis is an important part of non-engineering flood cont rolmeasures, and flood hazard assessment is the basis of risk analysis. Due to the need to obtain submerged water depth, the existing assessment methods of flood hazard requires complex hydraulic models and high-resolution data, but during operation, it is often impossible to meet the data requirements. In order to simplify the process of flood hazard assessment and ensure the accuracy of the results, this paper presents a new simple and integ rated floo d hazard index . T he index is based o n Gisnet and Ar cGIS and combines w it h the distributed hy dr olog ical mo del. In light o f the fo rmation mechanism of flood hazard, the index comprehensively considers the natural attribute of distributed streamflow and topographic index. Based on the specific situation of the Hongluogu in Beijing mountain area, we tested the new index. The results showed that FHI can truly reflect the trend of regional flood with spatial change. It can provide a new idea for the future flood hazard assessment, and has great significance to the improvement of flood risk study system.
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