Molitor-Stevenson Equation Calculator
Posted by Dinesh onUse the simple Hydraulics calculator to calculate height of waves using Molitor-Stevenson equation. The height and velocity of waves are functions of fetch and wind
velocity. Fetch is the clear-water distance form the dam to the opposite shore.
Generally the straight-line distance is used. However, where slight bends in the
measured line will lengthen the fetch, such bends may be incorporated according
to judgment.
The Molitor-Stevenson equation for the height of waves (hw) is
(i). For a fetch greater than 20 miles, hw = 0.17(V*F)0.5
(ii). For a fetch less than 20 miles, hw = 0.17(V*F)0.5 + 2.5 - (F)0.5
Height of Waves Calculation
Formula:
Molitor-Stevenson Equation
i. fetch greater than 20 miles hw = 0.17
- V = wind velocity
- F = fetch, statute miles
- hw = height of wave from trough to crest
- For wave heights between 1 and 7 ft, the velocity, v, in feet per second is given approximately by the formula
v ≈ 7+ 2*hw.