Egyptian Irrigation, Volume 1

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E. & F. N. Spon, Limited, 1913 - Irrigation - 883 pages
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Page 299 - They take the flow o' the Nile By certain scales i' the pyramid ; they know By the height, the lowness, or the mean, if dearth Or foison follow. The higher Nilus swells The more it promises ; as it ebbs, the seedsman Upon the slime and ooze scatters his grain, And shortly comes to harvest.
Page 299 - The seeds of future success lay in the resolve of King Menes- engineers to confine their attention to one bank of the river alone. It was the left bank of the river which history tells us was first reclaimed. A longitudinal dyke was run parallel to the stream, and cross dykes tied it to the Libyan Hills.
Page 319 - The offtake shall be taken off the deep water of the Nile when it is running along the bank from which the canal is taken, and the canal axis shall be as nearly as possible a tangent to the general curved sweep of the Nile's central current in the curved reach.
Page 50 - Nile mud does not supply a sufficient amount of nitrogen for the use of 'nitrogen consuming' crops, but the growth of bcrseem [leguminous plants] muy, in part at least, supply this deficiency. "Nile nnul supplies sufficient quantities of phosphoric acid and potash for the growth of fair crops of cotton, wheat, barley, maize, beans, and potatoes, but...
Page 300 - Bv this means, they insured the lake against being at a high level during a period of flood. The gigantic dykes of entry and exit were only cut in times of emergency, and were reconstructed again at an expense of labour which even an Egyptian Pharaoh considered excessive.
Page 288 - Assuan^on a total length of 1,809 kilometers, there are 563 kilometers of so-called cataracts with a total drop of 203 meters, and 1,246 kilometers of ordinary channel with a total drop of 83 meters At the foot of the first cataract, opposite the town of Assuan, on the island of Elephantine, has stood a Nile gauge from very ancient times. An officer belonging to the Roman garrison in the time of the Emperor Severus, marked an extraordinary high flood on the gauge. The maximum flood mark at the time...
Page 36 - Paris, 1903. In a preliminary note in this paper, attention is called to the fact that Orobanche tinctoria, which he had in the previous year shown to be a parasite on beetroot was really a plant loving siliceous soils, the clayey compact soils, which become cracked during the dry season, being almost free of it. It is possible to see areas with the parasites and others without them side by side, analyses at once showing the difference in the proportion of silica present. In the comparison of these...
Page 36 - ... 50 to 60 per cent. Owing to the greater water-holding power of the heavy soils, plant-life, and especially sugar-cane, is less liable to suffer on ' safra ' lands than on the heavy soils, Sachs...
Page 33 - ... channels of the Nile, while the more clayey portions are laid down between them. Sir W. Willcocks* recognized four main classes of soils, remarking as follows in connection with his views regarding injury by high-level canals : — (1) " The well-known dense black clay soil of a depth of over six or seven metres, which is very rich and especially suitable for cotton. It is injured very slowly by infiltration and saturation, but once injured its reclamation is slow and stubborn. Such soil has...
Page 301 - Fig. 79. — Bascule Bridge, Van Buren Street, Chicago. possesses rivers and streams whose waters are in flood for six weeks per annum can adopt basin irrigation with more or less profit. Also that this system alone allows of the thorough development of countries whose streams have short and turbid floods. The finest example of this kind is the Nile system, others are the storage tanks of Madras, and the basins of Bundelkund, where...

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