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    There’s a Giant Hole in this Dam Water!

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    SPADEZ
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    There’s a Giant Hole in this Dam Water!

    Post by SPADEZ on Mon Aug 02, 2010 12:09 am


    At first glance you might mistake a bell-mouth spillway for a watery
    vortex into another dimension. What can only be described as a giant
    hole in the water is actually a method for controlling the release of
    flows from a dam or levee into a downstream area. These spillways help
    prevent floods from ‘dam’-aging or destroying a dam.


    Photograph by The Cat’s Place


    SPILLWAYS
    - A spillway is a structure used to provide for the controlled
    release of flows from a dam or levee into a downstream area, typically
    being the river that was dammed
    - Spillways release floods so that the water does not overtop and damage
    or even destroy the dam. Except during flood periods, water does not
    normally flow over a spillway
    - In contrast, an intake is a structure used to release water on a regular basis for water supply, hydroelectricity generation, etc.
    - Floodgates and fuse plugs may be designed into spillways to regulate water flow and dam height
    - Other uses of the term “spillway” include bypasses of dams or outlets
    of a channels used during highwater, and outlet channels carved through
    natural dams such as moraines
    Source: Wikipedia

    Photograph by Jon Bradbury

    Photograph by Traqopodaros


    BELL-MOUTH SPILLWAYS
    - Some spillways are designed like an inverted bell so that water can
    enter all around the perimeter. These uncontrolled spillway devices are
    also called: morning glory, plughole, glory hole, or bell-mouth spillways
    - In areas where the surface of the reservoir may freeze, bell-mouth
    spillways are normally fitted with ice-breaking arrangements to prevent
    the spillway from becoming ice-bound
    Source: Wikipedia

    Photograph by David Wilby

    Photograph by Buster Bakewell


    LADYBOWER RESEVOIR
    - The images above are from the spillways located at the Ladybower Resevoir
    - The Ladybower Reservoir is a large Y-shaped reservoir, the lowest of three in the Upper Derwent Valley in Derbyshire, England
    - The River Ashop flows into the reservoir from the west; the River
    Derwent flows south, initially through Howden Reservoir, then Derwent
    Reservoir, and finally through Ladybower Reservoir
    - Its longest dimension is just over 3 miles (5km), and at the time of
    construction it was the largest reservoir in Britain (1943)
    Source: Wikipedia

    Photograph by the U.S. Bureau of Reclamation

    Photograph by the U.S. Bureau of Reclamation


    MONTICELLO DAM
    - The Monticello Dam is a dam in Napa County, California, United States constructed between 1953 and 1957
    - It is a medium concrete-arch dam with a structural height of 304 ft (93 m) and a crest length of 1,023 ft (312 m)
    - It contains 326,000 cubic yards (249,000 m³) of concrete. The dam
    impounded Putah Creek to cover the former town of Monticello and flood
    Berryessa Valley to create Lake Berryessa, the second-largest lake in
    California
    - The capacity of the reservoir is 1,602,000 acre•ft (1,976,000 dam³).
    Water from the reservoir is supplied mostly to the North Bay area of San
    Francisco
    - The dam is noted for its classic, uncontrolled spillway with a rate of
    48,400 cubic feet per second (1370 m³/s) and a diameter at the lip of
    72 ft (22 m).
    Source: Wikipedia

    Photograph by the U.S. Bureau of Reclamation

    Photograph by the U.S. Bureau of Reclamation


    SOURCES
    - Wikipedia: Spillways
    - Wikipedia: Ladybower Resevoir
    - Wikipedia: Monticello Dam

    Photograph by Keartona

    Photograph by Ian Stuart Armstrong

    Photograph by Spider Bob

    Photograph by Carl McCabe

    Photograph by ChezyNickAnnie

    Photograph by Wedesoft

    Photograph by Martin Roberts

    Photograph by Preseverando


    Source: http://twistedsifter.com/2010/05/giant-hole-in-water-bell-mout-spillways/



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    iRaz
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    Re: There’s a Giant Hole in this Dam Water!

    Post by iRaz on Mon Aug 02, 2010 12:42 am

    they are werid but the pics looks cool to me




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