TUNNEL OUTLETS FROM STORAGE RESERVOIRS. (INCLUDING PLATES AT BACK OF VOLUME)
Minutes of the Proceedings of the Institution of Civil Engineers
THE value of water for almost all purposes was early recognised by man ; and the records of Greek and Roman history show what store was set on it, and what large sums of money were annually spent upon securing a plentiful supply. A quantity which was then considered insufficient, or totally inadequate, would now in most parts of England be deemed profuse, for the ancients were not content merely with water for drinking and household purposes, but insisted on having it for their public and
... ir public and private baths, and for ornamental purposes such as fountains. Owing to the migration of people from rural districts to manufacturing towns in search of work and higher wages, the value of water during the present century has been mnch more keenly appreciated than formerly; and there are towns and cities where money has been freely spent, and the highest professional authorities of the day consulted, to gain a certain supply. I n order to provide for the wants of a city, town, or district, when the water supply is on the gravitation principle, it is in the first place necessary, after ascertaining the available rainfall, to select sites for, and to construct, Storage Reservoirs ; and it is with the usual methods adopted for drawing off the water from these that the Author proposes to deal. The position, design, and construction of the outlet from a large Storage Reservoir are among the most serious matters that come under the attention of an hydraulic engineer, as the safety of the embankment may be endangered, and the risk to many thousands of people in the district increased, from a want of due care on these points. For the sake of simplicity, the subject has been divided into two Downloaded by [ Heriot-Watt University Library] on [23/09/16].