To educate, entertain, and enthuse those who venture beyond the shore. Over 13,067 articles on solo swims, pro races, relays, charity events, eco-swims, stage swims, marathon swims, trends, products, services, personalities, coaches, governing bodies, rules, demographics, books, films, blogs, conferences, camps, clinics, exploits and happenings in oceans, seas, lakes, rivers, dams, canals, channels, fjords, estuaries, lochs, coves, firths, straits, bays, and harbors. Sponsored by WOWSA.org.
Thursday, May 23, 2013
How To Swim Around Curves In A River
It has to do with swimming around curves in river swims.
The question is which is faster: cutting the corner or swimming out with the faster current on the outside edge? For swims like the Manhattan Island Marathon Swim or certain swims that go around peninsulas or islands, it is an answer worth investigating.
"It turns out the radius of the curve, the speed of the river going into the curve, and the width of the river are factors in that decision.
The author of History of Open-Water Marathon Swimming continues, "This has a tangential application in a proposed swim, say in the Florida Straits, because the Gulf Stream is going around a big, big curve, a 90-mile-wide river that takes a 90º left turn, and then narrows.
When a river turns either to the right or the left, the inside shore usually will have a shallower depth due to the slower water dropping particles that were being carried along in the faster moving water. The water as it enter the bend will want to keep going straight and as the inner bank turns away, an eddy develops. Depending on the extent of the bend, some eddies can occupy from ¼ to ½ the width of the river. This forces even more water into a narrower part along the outside shore creating a fast channel.
The course through the bend depends on (1) the speed of the current entering, (2) the severity of the turn, (3) the depth of the river, and (4) the width of the river. The idea is to avoid the eddy along the inside shore. Of the four variables, three are constant so a good answer on one current may be the wrong answer on a faster current. My suggestion is to stay with the faster current for as long as possible but avoid going to the outside shore. On slow currents, turn when 1/3 past the start of the bend but wait no more than 2/3 on fast currents.
In the graphic, red is shallow water, yellow is the nominal depth, with green to blue increasing graduated depth showing the channel cut by the fast water."
Copyright © 2013 by World Open Water Swimming Association
A Thank You Gift from WOWSA
|WOWSA is celebrating the|
1-Year Anniversary of the monthly Open Water Swimming Magazine
by giving you a free copy of the anniversary issue.
Open Water Swimming Magazine Anniversary Issue
File Size: 13MB
Download the file to your computer, and then right-click to extract the magazine which is inside the zip folder. The magazine is in PDF format.
CLICK HERE to download your free copy now.
Open Water Swimming Magazine
Open Water Swimming MagazineThe Open Water Swimming Magazine is the monthly magazine entirely focused on open water swimming heroes and heroines of every age, ability, and background. Published by the World Open Water Swimming Association, the Open Water Swimming Magazine is a free benefit to WOWSA members.
WOWSA Member Benefits include 12 issues of the Open Water Swimming Magazine, the annual 276-page Open Water Swimming Almanac, a free listing in Sponsor My Swim, outstanding product discounts from FINIS, an entry in Openwaterpedia and more...
The Other Shore
The Other Shore follows world record holder and legendary swimmer Diana Nyad as she comes out of a thirty-year retirement to re-attempt an elusive dream: swimming 103 miles non-stop from Cuba to Florida without the use of a shark cage. Her past and present collide in her obsession with a feat that nobody has ever accomplished. At the edge of The Devil’s Triangle, tropical storms, sharks, venomous jellyfish, and one of the strongest ocean currents in the world, all prove to be life-threatening realities. Timothy Wheeler’s documentary brings Diana Nyad’s extraordinary adventure to life as Diana sets out to prove that will and determination are all you need to make the unimaginable possible.
2014 Open Water Swimming Almanac
An Almanac for Open Water SwimmingAn almanac is essentially a body of knowledge which is so complete that it enables people in different fields to make predictions about the future of their respective industries.
This, for example, was the purpose of the traditional farmers almanacs. It enabled farmers to determine as accurately as possible which crops to plant for the greatest harvests in a given year.
But the farmers almanac was just one example among many.
There are, of course, many different kinds of almanacs.
In fact, there is even one for open water swimming...
Preview the Open Water Swimming Almanac:
The trends are very clear.
The tide is rising for open water swimming.