The Sea-coast: (1) Destruction (2) Littoral Drift (3) ProtectionLongmans, Green, and Company, 1902 - 361 páginas This title deals with the effects of erosion and littoral drift on the English and continental coast-lines bordering the North Sea, and outlines protective measures including sea-walls and groynes. |
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Página 25
... sand - beds . On the East Coast , the Wash covers an area of about 157,600 acres , of which about 84,000 acres consist of sand - beds , dry at low water , the average thickness of which may be taken at 20 feet . The author has , at ...
... sand - beds . On the East Coast , the Wash covers an area of about 157,600 acres , of which about 84,000 acres consist of sand - beds , dry at low water , the average thickness of which may be taken at 20 feet . The author has , at ...
Página 36
... sand and where the latter predominates , the shingle is prevented from collecting into a bank . The pebbles , in fact , become buried in the sand , and the surface movement is not sufficient to allow them to be moved upward by the wave ...
... sand and where the latter predominates , the shingle is prevented from collecting into a bank . The pebbles , in fact , become buried in the sand , and the surface movement is not sufficient to allow them to be moved upward by the wave ...
Página 40
... Sand . What is generally understood by the term sand is a material consisting of minute fragments of the harder rocks . On some beaches it is almost entirely composed of fragments of marine shells . Sand is termed " coarse " when 50 ...
... Sand . What is generally understood by the term sand is a material consisting of minute fragments of the harder rocks . On some beaches it is almost entirely composed of fragments of marine shells . Sand is termed " coarse " when 50 ...
Página 41
... sand - beaches , and attain an inclination which represents an equilibrium of the wave forces : and , speaking generally , these sandy beaches retain their shape and position for long periods without material alteration . Where the sand ...
... sand - beaches , and attain an inclination which represents an equilibrium of the wave forces : and , speaking generally , these sandy beaches retain their shape and position for long periods without material alteration . Where the sand ...
Página 42
... sand to a state of semi - suspension . When water presses downward on sand it becomes firm and compact , but when the pressure is from below , the grains become separated and the sand quick . This may be caused by land - springs ...
... sand to a state of semi - suspension . When water presses downward on sand it becomes firm and compact , but when the pressure is from below , the grains become separated and the sand quick . This may be caused by land - springs ...
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The Sea-coast: 1. Destruction, 2. Littoral Drift, 3. Protection William Henry Wheeler Vista completa - 1902 |
Términos y frases comunes
12 feet 20 feet alluvium angle bank of shingle basalt beach in front beach material Blackpool boulder clay boulders Bridlington carried chalk chalk cliffs channel chert clay coast coast-line composed concrete considerable constructed Crown 8vo denudation deposited depth derived direction distance dunes east effect entrance erected erosion estuary extends face feet high Felixstowe flints flood tide foot gravel groynes harbour headland heavy gales height high tides high water Humber Illustrations inches in diameter island jetty Kilnsea land length limestone littoral drift London Clay low groynes low water marshes mile wide Morecambe Bay on-shore gales pebbles pier piles placed planking promenade protection quantity quartzite rise river rocks sand and shingle sand-hills sandstone sandy sea-wall seaward shingle and sand shingle-bank shore slope spit spring tides Spurn Point stones surface tidal timber varying wall washed waves breaking width wind Withernsea yards wide
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