924
JOURNAL OF PHYSICAL OCEANOGRAPHY
VOLUME 33
FIG. 9. Circulation and momentum balances for idealized inlet at slack before flood: (a) velocity flux (depth-averaged velocity
multiplied by total water column) vectors interpolated onto uniform 425-m grid for clarity, (b) free-surface elevation with 1-
cm contour intervals, (c) bathymetry with 1-m contour intervals, and (d)(k) shaded contours of individual momentum flux
terms (see text for description).
not spin down completely under the influence of bottom
jet, and therefore these areas switch to flood and positive
friction, as a free jet would. Instead, the streamwise
local acceleration sooner. Bottom friction and stream-
pressure gradient turns from favorable to adverse and
wise acceleration contribute little to the streamwise bal-
acts to ``brake'' the flow (Fig. 9f), and this results in
ance.
negative local acceleration (Fig. 9d). Along the sides,
In the normal direction, the primary balance is be-
the ebb momentum is sufficiently weak that the time
tween local rotary acceleration and normal direction
required to ``brake'' the flow is less than that for the
pressure gradient (Figs. 9h,j). Flow direction on the west
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