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Hec Ras Critical Depth
I agree that it should! I'm using 4.0 and just reviewed the release notes for 4.1, in things they've fixed, they say the alpha coefficiet was applied to the velocity for computing froude #.- mj406
- Post #8
- Forum: Storm/Flood engineering
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Hec Ras Critical Depth
Ran it in mixed and several sections are at critical and supercritical. After taking a closer look, the invert slopes on most of these are 1 - 1.5%. The hec reference manual claims that froude number calculation for irregular channels is not accurate, so that may explain the critical sections...- mj406
- Post #6
- Forum: Storm/Flood engineering
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Hec Ras Critical Depth
Well, I'm running sub critical on a 4.5 mile reach with 100+ XS's. Several cross sections are defaulting to critical depth, slope max is around 1%, flow area seems pretty consistant. I've tried interpolating cross sections, and that works in some cases, other cases the interpolated sections...- mj406
- Post #4
- Forum: Storm/Flood engineering
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Hec Ras Critical Depth
When hec ras cannot balance the energy equation with a subcritical answer between two cross sections, it defaults to the critical depth and carries on upstream with the step calcs. When I preview the cross section and profile, the wsel is shown at critical depth, however what's puzzling me is...- mj406
- Thread
- Replies: 9
- Forum: Storm/Flood engineering
