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 52
... raised above sea - level , and as bare of vegetation as the desert of Sahara . The southern portion of this vast sandy area is known as the Landes . The dunes , which consist of a series of hills and valleys , vary in width from 300 ...
... raised above sea - level , and as bare of vegetation as the desert of Sahara . The southern portion of this vast sandy area is known as the Landes . The dunes , which consist of a series of hills and valleys , vary in width from 300 ...
Página 72
... raised to a considerable height above the normal height of high water , and remain so permanently . This height and the size of the stones thrown up depend on the force of the gale , the length of the fetch to which the bank is exposed ...
... raised to a considerable height above the normal height of high water , and remain so permanently . This height and the size of the stones thrown up depend on the force of the gale , the length of the fetch to which the bank is exposed ...
Página 76
... raised considerably above the level of high tides . It is difficult to follow for any length of time the movement of individual pebbles , as , owing to the constant shifting in position , a marked stone becomes buried amongst the others ...
... raised considerably above the level of high tides . It is difficult to follow for any length of time the movement of individual pebbles , as , owing to the constant shifting in position , a marked stone becomes buried amongst the others ...
Página 77
... raised by the tidal wavelets and left on the bank above the reach of the falling water . Although the ebb acts for the same period on a bank as the flood , as the shingle is situated generally high up the beach , it is not able to ...
... raised by the tidal wavelets and left on the bank above the reach of the falling water . Although the ebb acts for the same period on a bank as the flood , as the shingle is situated generally high up the beach , it is not able to ...
Página 78
... raising 165 lbs . of pebbles a height of 1 foot . Taking the weight of stone in water as 100 lbs . per cubic foot , and that a pebble 2 inches in diameter weighs 0.25 lb. , the force of each wave would be capable of moving 660 pebbles ...
... raising 165 lbs . of pebbles a height of 1 foot . Taking the weight of stone in water as 100 lbs . per cubic foot , and that a pebble 2 inches in diameter weighs 0.25 lb. , the force of each wave would be capable of moving 660 pebbles ...
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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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