Study on Flood Rehearsal Simulation Based on Hydrodynamics and GIS Spatial Analysis
The accuracy of flood evolution simulation is crucial for the effectiveness of flood"rehearsal".In view of the low calculation accuracy,weak universality,and lack of field measurement data in basin flood rehearsa models,this paper proposes a flood rehearsal model based on hydrodynamics and GIS spatial analysis.The model adopts one-dimen-sional hydrodynamics and couples GIS spatial D8 diffusion algorithm for flood rehearsal simulation,and uses a compre-hensive risk degree model for risk calculation.The performance of the coupled model was verified in the Tairan River ba-sin.The results indicate that the proposed hydrodynamics and GIS spatial analysis flood rehearsal model can effectively ensure simulation accuracy,with an extremely high-risk area of 4.92 km2 within the basin.This model has important practical value in guiding flood rehearsal.
hydrodynamicsGIS spatial analysisflood forecastingrisk degreeTairan River basin
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