V-Notch is used for water seepage monitoring at the dam wall structure.


  • V-Notch can be also used for dam reservoir water level monitoring and catchment water level monitoring
  • The basic principle is that discharge is directly related to the water depth above the crotch (bottom) of the V; this distance is called head (h).
  • The V-notch design causes small changes in discharge to have a large change in depth allowing more accurate head measurement than with a rectangular weir.

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