Point Ybel is not the same as Big Carlos Pass. They're near by, but the Big
Carlos Pass bridge span is a lot narrower constriction...causing much faster
current flow. Try going in/out of Hickory Pass on a strong tide!




"LaBomba182" wrote in message
...
Subject: Slow/idle speed under bridges?
From: reg

As I said, it was 12 knots the other day on my GPS.

Wow! Ten times or more the predicted speed!?

Point Ybel (0.4 Mi. NW of), Florida Current
10 September 2003 - 11 September 2003
Point Ybel (0.4 Mi. NW of), Florida Current
26.4567° N, 82.0183° W

2003-09-10 03:51 EDT -0.00 knots Slack, Ebb Begins
2003-09-10 06:02 EDT -0.60 knots Max Ebb
2003-09-10 07:11 EDT Sunrise
2003-09-10 07:59 EDT 0.00 knots Slack, Flood Begins
2003-09-10 11:01 EDT 1.22 knots Max Flood
2003-09-10 12:36 EDT Full Moon
2003-09-10 14:26 EDT -0.00 knots Slack, Ebb Begins
2003-09-10 18:17 EDT -1.47 knots Max Ebb
2003-09-10 19:38 EDT Sunset
2003-09-10 21:22 EDT 0.00 knots Slack, Flood Begins
2003-09-11 00:03 EDT 1.06 knots Max Flood
2003-09-11 03:56 EDT -0.00 knots Slack, Ebb Begins
2003-09-11 06:36 EDT -0.73 knots Max Ebb
2003-09-11 07:11 EDT Sunrise
2003-09-11 08:44 EDT 0.00 knots Slack, Flood Begins
2003-09-11 11:39 EDT 1.27 knots Max Flood
2003-09-11 15:07 EDT -0.00 knots Slack, Ebb Begins
2003-09-11 18:52 EDT -1.28 knots Max Ebb
2003-09-11 19:37 EDT Sunset
2003-09-11 21:44 EDT 0.00 knots Slack, Flood Begins
2003-09-12 00:17 EDT 1.07 knots Max Flood

A bit hard to believe. But I'd like to see that. Is it still going out
that
fast? Maybe I'll run down and check it out.

Capt. Bill

Subject: Slow/idle speed under bridges?
From: reg

BTW is that a prediction or a measured flow?

Predicted, I believe. Thanks for the links.


Capt. Bill

These USGS flow stations only look at volume of water entering the estuaries
from upland but that will relate to current. The upstream stations (North
Estero river branch etc) are flow monitors and the ones in the bay and closer
to river mouths look at the other factors like salinity and dissolved oxygen.
If you look at the graph on site 02291610 (a mile up the Estero River) you can
watch the salt water wedge come and go on the tide changes. It swings from
almost zero salt to 18PPT or so (the Gulf being 38 or so). In the winter when
the flow rates are down that will consistantly be above 16.