出典:Wikipedia
出典:『Wikipedia』 (2010/10/14 22:54 UTC 版)
A set of outlet works is a device used to release and regulate water flow from a dam. Such devices usually consist of one or more pipes or tunnels through the embankment of the dam, directing water usually under high pressure to the river downstream. These structures are usually used when river flow exceeds the capacity of the power plant or diversion capacity of the dam, but do not have flows high enough to warrant the use of the dam spillways. Although similar in purpose to spillways, outlet works provide a more controlled release to meet downstream flow requirements.