"a" column or row of the kana syllabaryIntroduction to Damsdam terminology

orifice gate

orifice gate "a" column or row of the kana syllabary
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Reading: Orifice gate
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An orifice gate is a discharge gate installed at a depth of less than 25 m below the full water level at any given time. It is mainly used to regulate the water level of the dam lake and the amount of water flowing downstream as flood control. It is sometimes used as a permanent flood discharge. Gates are often located near the middle or slightly above the middle of the embankment when viewed from downstream of the embankment.

The gate itself, unlike the conduit gate, does not use a long discharge pipe.

The original meaning of "orifice" is "an opening through which a jet of fluid flows out.

Orifice gate of Eiheiji Dam

The part in the center that is discharging is the orifice gate.

Looking up the levee from the bridge downstream
Looking up the levee from the bridge downstream

Tamagawa Dam orifice gate

The hole in the center is the orifice gate.

View of the crest from the downstream plaza on the right bank
View of the crest from the downstream plaza on the right bank

This article was written by.
Shin Jinma

Dam enthusiast who loves Momosuke Fukuzawa / Dampedia and Dam News administrator / Certified Dammeister (01-018) by the Japan Dam Foundation / Started selling discharge caution goods.https://shop.dampedia.com

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