HAZUS-MH MR3 FAQs: Flood Model Operation and Analysis
I ran a stream network function for my study region but it does not completely correspond with the National Hydrologic Dataset (NHD) I already have. Is it possible to add the NHD and use it in the Flood Model?
No. The stream network developed by the Flood Model is used for several purposes:
- Stream centerline locations,
- Attributes to infer flow direction such as from node and to node, and
- Association with grids derived from the DEM such as flow accumulation, flow direction, flow length, and watersheds.
Applying a user-supplied stream network might improve stream locations but would cause problems in the model due to the absence of stream attributes and associated grids. The best way to improve the stream network delineated in HAZUS is to use a DEM with greater accuracy and/or resolution than the default NED.
The NHD has been updated for only a few states in the nation and making this dataset useful within the Flood Model would not be cost effective until more states have been updated and data validated.
For additional information, the HAZUS User's Manuals and guidance materials are available for download from the HAZUS Resources on this site.
Need Additional Help?
Email: HAZUSGenHelp@nibs.org for general questions about HAZUS
HAZUSFloodHelp@absconsulting.com for Flood Model questions
Last Modified: Wednesday, 07-Nov-2007 22:25:06 EST
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