Named after the inventor, this widely used flume causes little head loss and passes sediment readily. Constructed, flumes are supplied with measuring scales, spirit levels and calibration curves.
TECHNICAL DETAILS
FEX26-1:
Parshall flume 25mm throat
for flows 0.3 to 5 L/sec
FEX26-2:
Parshall flume 51mm throat
for flows 0.5 to 14 L/sec
FEX26-3:
Parshall flume 152mm throat
for flows 1.5 to 110 L/sec
Overall Dimensions
FEX26-1:
Height: 275MM , Width: 360MM, Depth: 750MM
FEX26-2:
Height: 310MM , Width: 420MM, Depth: 850M
FEX26-3:
Height: 760MM , Width: 900MM, Depth: 1850MMM
FEX26-4/5/6
WSC flumes
This trapezoidal design of flume, developed by Washington State College (WSC) for field irrigation, has the advantages over the rectangular flume of giving a greater depth range, of conforming more closely to the channel section and of allowing sediment to pass more freely. Constructed, these flumes are fitted with a depth measuring scale.
TECHNICAL DETAILS
FEX26-4:
WSC flume for flows 0.1 to 2.0 L/sec
FEX26-5:
WSC flume for flows 1.0 to 7.5 L/sec
FEX26-6:
WSC flume for flows 6.0 to 76 L/sec
Overall Dimensions
FEX26-4:
Height: 175MM , Width: 250MM, Depth: 500MM
FEX26-5:
Height: 230MM , Width: 350MM, Depth: 780M
FEX26-6:
Height: 420MM , Width: 707MM, Depth: 1057MMM
FEX26-7
Thin plate weirs & accessories
Thin plate weirs are constructed of stainless steel and mounted on a painted weir plate carrier which can set either into the banks and bed of a small stream or fixed to the end of a concrete channel. A simple head scale is attached to each weir plate but a stilling well can be fitted for greater accuracy.
The following weir plates are supplied: rectangular weir, Cipoletti weir, 900 v-notch weir, 1⁄2 900 v-notch weir.
TECHNICAL DETAILS
Rectangular weir:
max flow rate of 28 L/sec
Cipoletti weir:
a trapezoidal shaped weir with a max flow rate of 28 L/sec
900 v-notch weir:
max flow rate of 15 L/sec
1⁄2 900 v-notch weir:
max flow rate of 7.5 L/sec
FEX26-8
Stilling well with depth gauge
Depth gauge comprises 300mm hook and point gauge, resolution 0.1mm.
FEX26-9
Channel section
A lightweight channel section made from corrosion resistant material with the provision for easy mounting of the FEX26-10/11.
FEX26-10
Broad-crested weir
Used for controlling upstream water levels and measuring discharge rate.
The weir is set perpendicular to the flow across the channel bed. It is particularly
useful in sediment laden waters that can be detrimental to sharp edged weirs.
FEX26-11
Crump weir
Named after its designer, C.S. Crump, this broad-crested weir is triangular in section making it less likely to trap silt and debris. The weir is used for accurate measurement of discharge rates.
