The Designing and Construction of Storage ReservoirsD. Van Nostrand, 1888 - 137 páginas |
Dentro del libro
Resultados 1-3 de 3
Página 16
... chalk , etc. , are too absorbent to offer the desired conditions for storage . It is not here asserted that all the water absorbed by porous rocks is necessarily 1 intercepted from passing away to con- tribute to storage 16.
... chalk , etc. , are too absorbent to offer the desired conditions for storage . It is not here asserted that all the water absorbed by porous rocks is necessarily 1 intercepted from passing away to con- tribute to storage 16.
Página 18
... the design of any particular work : Steep surfaces of granite , gneiss , and slate Moorland and hill pasture . Flat cultivated country . Chalk . 100 CO to 80 40 to 50 0 to 0 In order to arrive at more specific , and truly 18.
... the design of any particular work : Steep surfaces of granite , gneiss , and slate Moorland and hill pasture . Flat cultivated country . Chalk . 100 CO to 80 40 to 50 0 to 0 In order to arrive at more specific , and truly 18.
Página 49
... chalk . Lee , at Lee Bridge , chalk ( Rennie , Valley Hill . ft . ft . 40 to 700 400 to 2600 110 to 700 oolites , 10 to 600 200 to 500 April , 1796 ) .. 30 to 600 70 to 350 Medway , dryest seasons ( Rennie , 1787 ) , clay . 1787 ...
... chalk . Lee , at Lee Bridge , chalk ( Rennie , Valley Hill . ft . ft . 40 to 700 400 to 2600 110 to 700 oolites , 10 to 600 200 to 500 April , 1796 ) .. 30 to 600 70 to 350 Medway , dryest seasons ( Rennie , 1787 ) , clay . 1787 ...
Otras ediciones - Ver todas
Términos y frases comunes
adopted amount ample ANTICLINAL ascer available rainfall bank bankment calculated carry catchment basin chalk cient climate of India cloth considerable course cubic foot culvert depth designed dimensions discharge districts drainage area drains earth earthen dam earthwork embankment engineer equal escape evaporation evident extent favorable feet float flood flow foundation freshet gathering grounds gauging geological gineering greensand height India inner inside irrigation Jacob laid layers length less masonry center wall masonry dam material ment mode of construction mortar necessary oolites Oxford clay passing percolation practice pressure of water probably proportion puddle wall quantity question rain Rainfall per Annum rectangular wall regard result rip-rapped rule shown in Fig side sider slope spill-way springs square miles stones storage reservoirs strata stream suffi sufficient supply surface SYNCLINAL syphon tain taken terial thickness tion valley valve vertical waste pit waste weir water-shed water-tight whole
Pasajes populares
Página 25 - Neither does much take place whenever the atmosphere is more than 15 deg. colder than the surface upon which it acts. Winds powerfully promote evaporation, because they bring the air into continual as well as into closer and more violent contact with the surface acted upon, and also, in the case of liquids, increase by the agitation which they occasion, the number of points of contact between the atmosphere and the liquid.
Página 26 - Humboldt, from observations made in the passage across the Atlantic, found that in the torrid zone the quantity of vapour contained in the air, is much nearer to the point of saturation than in the temperate zone. The evaporation within the tropics is, on this account, less than might have been supposed from the increase of the temperature.
Página 26 - Щ), with a mean temperature of 81.86 degrees, it was ascertained to be more than 100 inches in the course of the year ; at Guadaloupe, in the West Indies, it has been observed to amount to 97 inches. The degree of evaporation very much depends upon the difference...
Página 83 - G, is connected with the reservoir, E, by a pipe, K, which supplies water to float the cylinder, D. Now, it is evident that the discharge from the reservoir will be regulated by the position of the lever, B, and this again will be controlled by the height of the float, D. To regulate this height the supply from the cistern, G, must be self-adjusting, or be regulated by the amount of water flowing away. The float, N, has attached to it a spindle, on which are fixed two double-beat valves that work...