ERDC/CHL CHETN-IV-32
June 2001
where
ζ L = water elevation on the front side of the internal barrier relative to the geoid (the
hypothetical surface around the Earth that is everywhere normal to the direction of
gravity and coincides with mean sea level in the oceans),
ζ R = water elevation on the back side of the internal barrier relative to the geoid and
h p = elevation of the crown of the cross barrier pipe relative to the geoid.
There is no cross-barrier flow through the pipe. Thus, the cross-barrier flow equals:
Qn = 0
(2)
It is assumed that flow through the cross-barrier pipe is negligible if both sides of the pipe are
only partially submerged. This assumption is reasonable when comparing the amount of through
flow when at least one end of the pipe is fully submerged.
Configuration 2: Water Level on Both Sides of the Internal Barrier Equal
Water elevation is equal on both sides of the internal barrier (Figure 2). Thus
ζL =ζR
(3)
There is no cross-barrier flow through the pipe. Thus, the cross-barrier flow equals:
Qn = 0
(4)
Figure 2. Water level on both sides of the internal barrier equal
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