|
|
|
Turbulent bore on the River severn. When large tides travel many kilometers over
shallow water the front of the tidal wave, that is, the first part of
the flood tide, steepens. It may form a "bore," which is a traveling form
of hydraulic jump. The Hooghy estuary in India and that of the Tsien Tang
in China have the biggest bores. Other large bores occur in the Amazon,
Seine and Severn. The Severn bore is seen here in a turbulent condition
crossing water that is about 20 cm deep over Rodley Sands opposite Framilode.
Photograph by D.H. Peregrine. Reproduced from An Album of Fluid Motion
by Milton Van Dyke, 1982, Parabolic Press. This book contains a marvelous
collection of photographs. It is inexpensive (about $25 for a paperback
version), and it makes a great present.
|
|
