Presentation is loading. Please wait.

Presentation is loading. Please wait.

Open channels – uniform flow, and flow routing. We can consider 4 cases of streamflow Flow does not change in time Flow changes in time Flow does not.

Similar presentations


Presentation on theme: "Open channels – uniform flow, and flow routing. We can consider 4 cases of streamflow Flow does not change in time Flow changes in time Flow does not."— Presentation transcript:

1 Open channels – uniform flow, and flow routing

2 We can consider 4 cases of streamflow Flow does not change in time Flow changes in time Flow does not change in space Flow changes in space

3 Flow does not change in time Flow changes in time Flow does not change in space Steady, Uniform flow – stream flow under some conditions – use Manning’s equation Unsteady gradually varied flow – stream flow under some conditions – use a routing method Flow changes in spaceSteady, Nonuniform flow - Flow over a waterfall/weir – use surface profile methods or Energy equation UnsteadyDam break, surges – use complex computer models

4 Geometry of Uniform Flow

5 Trapezoidal cross-section of Uniform Flow

6 Circular cross-section of Uniform Flow

7 Manning’s equation From Robert Manning, Irish engineer ( ) Empirical formula Dates from 1889

8

9 Hydrogaphs and routing


Download ppt "Open channels – uniform flow, and flow routing. We can consider 4 cases of streamflow Flow does not change in time Flow changes in time Flow does not."

Similar presentations


Ads by Google