曼寧粗造度係數, n?

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在特定斜率和深度的均勻梯形流動曼寧公式

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Inputs

流量,q		X
管徑,d₀		X
Pipe length, L		X
曼寧粗造度係數, n? ?		X
Total combined junction loss coefficient, k		X
Downstream EGL		X

結果:

Area, A	Area, A		X
濕周	濕周		X
水力半徑	水力半徑		X
流速, v	流速, v		X
速度壓頭, hv	速度壓頭, hv		X
Friction slope	Friction slope		X
Average 剪應力(牽引力), tau	Average 剪應力(牽引力), tau		X
Friction loss, H_f	Friction loss, H_f		X
Junction loss, H_m	Junction loss, H_m		X
Total loss, H_l	Total loss, H_l		X
Upstream EGL	Upstream EGL		X
Upstream HGL in pipe (See notes)	Upstream HGL in pipe (See notes)		X

Notes:

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.