Free Online Manning Pipe Head Loss Calculator
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Manning Formula Head Loss at Given Full Flow
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- For an open inlet (culvert) condition, it is necessary to check for inlet control conditions.
- 1. The upstream HGL cannot be lower than the upstream normal depth flow elevation (or lower than the pipe!).
- 2. The headwater of a culvert is better represented by the upstream EGL than the upstream HGL.
- 3. See my 2-minute tutorial for simple standard culvert headwater calculations using HY-8.
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