The objective of this practice is to carry out flood hazard assessment, identify the potential flood prone areas and potentially affected infrastructure namely roads, settlements, agriculture and in-land areas etc. against flood hazard of particular return period i.e. 2, 5, 10, 25, 50 and 100 years.
This Recommended Practices uses the HEC-RAS 2D flood model. The model was developed by US Army Corp of Engineer’s Hydrological Engineering Center (HEC). The model can solve 1D and 2D flood hazard problems through 1D, 2D and 1D/2D coupling approaches.
HEC-RAS 2D requires following geometric datasets:
Digital Elevation Model (DEM)
Landcover/Landuse Map
Manning’s n layer
2D Flow Area
Boundary condition lines
River Cross-sections (in case of 1D and 1D/2D coupling approach)
Embankments
Restricted areas (if any)
The insights obtained through this Recommended Practice can be used by disaster management agencies and other stakeholders to plan flood rescue, relief and mitigation activities.
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Descargo de responsabilidad:
Por favor tome nota que ni ONU-SPIDER ni las Oficinas Regionales de Apoyo o sus socios se responsabilizan por la calidad de los resultados que se obtienen usando esta práctica recomendad o las decisiones que se tomen con estos resultados.
