Tide

Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon, Sun, and rotation of the Earth.

The times and amplitude of tides at a locale are influenced by the alignment of the Sun and Moon, by the pattern of tides in the deep ocean, by the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry (see Timing). Some shorelines experience a semi-diurnal tide - two nearly equal high and low tides each day. Other locations experience a diurnal tide - only one high and low tide each day. A "mixed tide"; two uneven tides a day, or one high and one low, is also possible.

Tides vary on timescales ranging from hours to years due to a number of factors. To make accurate records, tide gauges at fixed stations measure the water level over time. Gauges ignore variations caused by waves with periods shorter than minutes. These data are compared to the reference (or datum) level usually called mean sea level.

High Water (disambiguation)

High water is the time in a tidal system when the tide is highest.

High Water or Highwater may also refer to:

Music

Other uses

See also

High Water (For Charley Patton)

"High Water (For Charley Patton)" is a song by Bob Dylan, released on his 31st studio album "Love and Theft" in 2001. The song draws its title from the Charley Patton song "High Water Everywhere", and is meant as a tribute to that bluesman. It is one of many songs based on the 1927 Louisiana flood. Other songs about the event include Memphis Minnie's "When the Levee Breaks" (also recorded by Dylan on his Modern Times album as "The Levee's Gonna Break"), and Randy Newman's "Louisiana 1927".

The song directly quotes three classic American songs in the last two verses, first the traditional ballad "The Cuckoo" with the line:

"The cuckoo is a pretty bird
She warbles as she flies."

Robert Johnson's "Dust My Broom" with the line:

"I'm getting up in the morning
I believe I'll dust my broom."

Charlie Pattons " Shake it and break it" with the line:

"You can shake it, you can break it, you can hang it on the wall." Bob's amended version of this line is "Bertha Mason shook it – broke it, then she hung it on a wall."