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Updated: June 11, 2025
Accordingly the canal was extended northwards, partly by cutting and partly by tunnelling to the Ghazr Su at about two miles above its mouth, and a permanent supply was thenceforth obtained from that stream. The work may have been intended in part to supply Calah with mountain water; but the remains of dams and sluices along its course sufficiently show that it was a canal for irrigation also.
The sea was kept out by a magnificent system of dykes under the daily superintendence of a board of officers, called dyke-graves, while the rain-water, which might otherwise have drowned the soil thus painfully reclaimed, was pumped up by windmills and drained off through sluices opening and closing with the movement of the tides. The province of Zeeland was one vast "polder."
The German national outburst which followed the French declaration, and resembled a stream bursting its sluices, was a surprise to French politicians.
For that reason, in the happier times of India, a number, almost incredible, of reservoirs have been made in chosen places throughout the whole country: they are formed, for the greater part, of mounds of earth and stones, with sluices of solid masonry; the whole constructed with admirable skill and labor, and maintained at a mighty charge.
These despatches gave distinct directions to Sonoy to flood the countlv at all risks; rather than allow Alkmaar to, fall into the enemy's hands. The dykes and sluices were to be protected by a strong guard, lest the peasants, in order to save their crops, should repair or close them in the night-time.
The prince was now occupied in endeavouring to persuade the Dutch authorities to permit the great sluices at Rotterdam, Schiedam, and Delft Haven to be opened. The damage to the country would be enormous; but there was no other course to rescue Leyden, and with it the whole of Holland, from destruction.
They never realize that we haven't got time to talk it all out for a few weeks. There's one old cuss now that's making us trouble about the water. Don't want to open up to give us a fair run through the sluices of his dam. Don't seem to realize that when we start to go out, we've got to go out in a hurry, spite o' hell and low water."
A great masonry dyke, 150 feet high in places, has been carried across the Bab el-Kebir of the First Cataract, and a canal and four locks, two hundred feet long and thirty feet wide, allow for the passage of traffic up and down the river. Showing Water Rushing Through The Sluices
They treated but four boxes in this way, leaving the lower two-thirds of the flume untouched, for Anvil Creek gold is coarse and the heart of the clean-up lies where it is thrown in. Gathering the sacks together, they lashed them upon the pack-animals, then mounted the second string of sluices and began as before.
Notwithstanding this slow sinking, most of the land enclosed by dikes is still above low-water mark, and can, therefore, be wholly or partially freed from rain-water, and from that received by infiltration from higher ground, by sluices opened at the ebb of the tide.
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