University:
Santa Fe College
Course:
PHY 2004 | Applied Physics 1
Academic year:

2024
Views:

259

Pages:

6
Author:

Jabin F.

Q = (A/n) * (y_n)^(2/3) * (So)^(1/2) Normal depth is dependent on bed slope, A, n, Q. y_c = (q^2 / g)^(1/3) Critical depth is independent on bed slope. C2, H-1, A-1. Not Exist Total 12 profile Exist. Any portion b/w CDL And Top surface ) Zone I and NDL And Top surface ) CDL And NDL ) Zone II CDL and bottom ) Zone III NDL and bottom ) if energy line is parallel to channel bottom i.e. Sf = So => y = yn if energy line Slope is Greater than bottom slope Sf > So => y < yn if Sf < So => y > yn Region - 1 => y > yn ↓ Sf < So y > yc ↓ Fr < 1 dy/dx = (So - Sf) / (1 - Fr^2) = (+ve) / (+ve) = +ve dy/dx = +ve / +ve = +ve back water curve. Region - 3 => y < yn Sf > So y < yc Fr > 1 dy/dx = (-ve) / (-ve) = +ve back water curve => Region 1 and Region 3 depth of flow always ↑ in the dirn of flow. Region - 2 => Mild y < yn ↓ Sf > So y > yc ↓ Fr < 1 dy/dx = (-ve) / (+ve) = -ve (draw down curve) A small sketch shows yn above yc, and y below yn but above yc, indicating a drawdown curve. NDL and CDL are labeled.