The overflow (maximum depth) weir of the No2 reservoir

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Comments (1)

Bruce Comfort on February 5, 2012

This is one of the few in-reservoir structures that is not plastered, so it may have been erected after the construction period around 1910. It is a small weir with overflow falling vertically into pipework that is buried in the bund - so some sort of overflow must have been constructed at this place as the bund was built up - it may have been an open vertical tube - these are notoriously less efficient at spilling water than a horizontal weir.

The rim of the bund is up just 600 above the weir - sufficient to have "caught" most but not all of the waves on the surface if the reservoir was full on a windy day!

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Photo taken in Centennial Park, Otipua Creek 7974, New Zealand

Photo details

  • Uploaded on February 5, 2012
  • Attribution-Noncommercial-No Derivative Works
    by Bruce Comfort
    • Camera: SAMSUNG ES65, ES67 / VLUU ES65, ES67 / SAMSUNG SL50
    • Taken on 2012/02/02 14:30:19
    • Exposure: 0.004s (1/250)
    • Focal Length: 4.90mm
    • F/Stop: f/3.500
    • ISO Speed: ISO100
    • Exposure Bias: 0.00 EV
    • No flash