Report of the Royal Commission appointed to inquire into the water supply of the metropolis - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...galleries in the Chalk above the intakes. But any such abstraction would probably be at the expense of the springs and streams feeding the Thames, and would proportionately diminish the flow of the main stream in dry weather. Chalk under London. App. C. 4. 8720, 9480. 104, 7905, 7965. 101. In the area under London, deep wells drawing water from the Chalk have been in operation for many years, and the number of such wells has greatly increased. Mr. Binnie has made inquiry into the past history and present condition of no fewer than 172 chalk wells within and outside the county of London. It is difficult to obtain accurate statistics as to the quantity of water daily abstracted by these wells, many of the owners refusing to give information regarding them. But the amount so obtained has been estimated at about 10,000,000 gallons per day. Some of this water is derived from the outcrop of Chalk to the south of London (Mole, Wandle, Ravensbourne) which drains into the Thames below the intakes, the rest comes from the Chalk above the intakes. It is evident that even the comparatively large amount of water pumped from under London can make no appreciable diminution of the vast store collected by the Chalk above the intakes. This great subterranean reservoir discharges its overflow partly by springs and streams into the Thames, but probably also in part by flowing eastwards under the Tertiary covering into the lower part of the basin of the Thames. On the question of the effect of pumping from deep wells on the water-level in the chalk much evidence has been brought before us, and various entirely contradictory opinions have been expressed regarding it. But there is one branch of it on which there seems to be a general agreement, viz., that under London the water-l...
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