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Old 11-20-2003, 03:43 PM
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Unsteady Hydrographs
When I'm creating an unsteady flow model and I'm importing my hydrographs from the DSS created by HEC1. My question is.....do I use the hydrographs from individual basins or should I use hydrographs that have been routed in HEC1. Any help is greatly appreciated.
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Old 11-20-2003, 03:44 PM
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Re: Unsteady hydrographs
...backwater effects...
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Old 11-20-2003, 03:45 PM
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Join Date: Jan 1970
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Re: Unsteady hydrographs
This is typical behavior for a hydrograph resulting in a looped rating curve. See fig. 8.23 of the User's manual.

HEC-RAS Users Group wrote:

> Hi!
>
> Can anyone give me a reason why the resultant hydrograph of an unsteady flow simulation have a delay of one hour between the peak flow and peak stage, for the same RS??
>
> Gratefull.
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