Measurement of Stream Discharge by Wading

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•Reach should be straightand uniform for a longenough distance to provideuniform flow through themeasuring sectionSite Selection•Streambed should be stableand free of large rocks,weeds, and protrudingobstructions.Upstream view of excellentmeasuring section, Little BlackfootRiver
Assessing Measurement• Assessing accuracy of measurement•Semi-quantitative based upon:1. Cross section uniformity2. Velocity uniformity3. Stream bed conditions4. Etc.See “Determination of Error inIndividual DischargeMeasurements” by Sauer andMeyer announced in OSWmemo 93.14Blackfoot measuring section
Page 1 and 2: Measurement of Stream Discharge by
Page 3 and 4: Agenda•The velocity-area concept
Page 5 and 6: Channel cross section is divided in
Page 7 and 8: Water velocity in each sub-sectioni
Page 9 and 10: Computing width and depth of indivi
Page 11 and 12: Recording Width and DepthMeter loca
Page 13 and 14: Measuring Cross-Section AreaDepth
Page 15 and 16: WadingRod UseRod set someter placed
Page 17 and 18: Velocity Determination• USGS gene
Page 19 and 20: Headset and StopwatchStop Watch and
Page 21 and 22: Marking Meter• Meter revolutions
Page 23 and 24: Rating Table Equations• Equations
Page 25 and 26: Distance below water surface inperc
Page 27 and 28: Velocity Measurement MethodsGuide t
Page 29: Distance below water surface inperc
Page 33 and 34: Selected References• Buchanan, T.

Measurement of Stream Discharge by Wading

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