Fish Hatchery Management - fisheries & aquaculture

WEIRSoo\/ooo \l+2"O\-^rv^^TlOLvvLv EDGES TO rv BE uL vut CUTI\ SM00TH,SMOOTH, STRAIGHTAND I 2"1TO EXACT DIMENSIONS.oHOLES FOR lOdGALVAN IZED NAILSAT 4" 4"O.C.l:llTloItlo o o o o'o o o o olloFtcunr D-1. (f"p) Diagram of a Cippoletti weir plate. It should be cut fromNo. 8 or No. 10 galvanized iron plate. The trapezoidal notch must be cut to theexact dimensions as shown. Flow rates with this weir will be twice the valuesshown in Table D-1. (Bottom) A rectangular weir installed to measure waterflow at the discharge of a fish hatchery. A sight gauge (insert) with a float in analuminum cylinder is used to measure water depth over the crest of the weir. Itmust be positioned at a distance at least 2.5 times the depth of the water flowingover the weir.