Proceedings of the ITA World Tunnelling Congress 2003, 12-17 April 2003, Amsterdam, The Netherlands Jan Saveur ... The water impoundment at 130 m a.s.l. reduces maximum discharges and extends the emptying time. ... This natural cave is located above the main conduit which conveys over 90% of inflow into the Ombla spring. ... vertical shaft shall also be a facility where the water flow shall be diverted by closing of a particular tunnel in order to conduct inspections and repairs.
|Title||:||(Re)claiming the Underground Space|
|Publisher||:||CRC Press - 2003-01-01|