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The capacity of an irrigation tank is sometimes increased by installing a temporary stone wall over the top of the tank weir. This fixture is known as____________________

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in Irrigation Engineering by (75.2k points)
The capacity of an irrigation tank is sometimes increased by installing a temporary stone wall over the top of the tank weir. This fixture is known as____________________

(a) saddle

(b) dam stone

(c) breast wall

(d) divide wall

I got this question in an international level competition.

Enquiry is from Tank or Surplus Escape Weirs Design topic in division River Navigation & Tank Irrigation of Irrigation Engineering

1 Answer

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by (106k points)
Right answer is (b) dam stone

Easy explanation: A common practice has been resorted to in South India is to fix dam stones at the crest wall of the weir. The dam stones cause obstruction to the discharge and if no dam stones or shutters are provided above F.T.L, the flood water will start spilling over the surplus work immediately after the tank water level exceeds F.T.L.

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