perfect pitchperfect pitch - cdn2.cloud1.cemah.net · perfect pitchperfect pitch simple techniques...
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Perfect PitchPerfect PitchSimple Techniques for DeterminingS G d T S lStream Gradients at Two Scales
Thomas Tisue Ph DThomas Tisue, Ph. D.White River Watershed Partnership
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kTake-awaysA tool for choosing sampling locationsA tool for choosing sampling locations
representative of stream gradientsTips on surveying road crossing gradients &
profilesprofiles
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"Mountain torrent" "Lazy river"
G di t d t iGradient determines hydraulic diversity
Habitat type and diversitydepend on hydraulic diversity
Gradient "sets the stage"
"Babbling brook"
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Determining gradients on a scale of miles
GIS i
Option Comments
GISOn-the-ground surveys*
$$; expertiseEquipment; expertise; time
Topographic maps Low precision
Google Earth-based tools
Satellite-based tools
Online; how to implement?
Check with NOAA/NASASatellite-based tools Check with NOAA/NASA
* Best choice for short reaches; to be discussed later Best choice for short reaches; to be discussed later
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Daft Logic Inc. online tools provideelevations and distances along channelg
Elevationshttp://www daftlogic com/sandbox-google-maps-find-altitude htmhttp://www.daftlogic.com/sandbox google maps find altitude.htm
Navigate to map location and read altitude (displayed to 6-7 significantfigures)
Cumulative point-to-point distanceshttp://www.daftlogic.com/projects-google-maps-distances-calculator.htm
Point and click at multiple locations along stream channel (cumulativedistance displayed to 3 - 7 significant figures, depending on units)
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Looks rather uniform,but variations are
significantg
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Gradient Type Hydraulic diversity
11 - 70 Riffle/pool Excellentbl h destablished
6 - 10.9 Riffle/pool Gooddeveloping
3 - 5.9 Few riffles Moderate
0 - 2.9 Runs Low
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Ground truth?Ground truth?
No uphill flow!
Good overall correspondence of dominantin-stream substrate types to variations
No uphill flow!
in stream substrate types to variationsin stream gradient
M d l d b d blMore detailed corroboration desirable, including pebble counts (in progress)
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Gradients on the Scale of Yards:A Closer Look at Road Crossings
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h f f d bl PDF M PDFhttp://www.stream.fs.fed.us/publications/PDFs/RM245E.PDF
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What's d dneeded?
Transit levelRebar & sledge
Stadia rodTape measures
Rebar & sledgeWaterproof notebook
Insect repellantMachetesT p
GPSMachetes
Walkie-talkies
(+ short pants. high boots, funny hats)
Total cost ~ $1K
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Pre-improvement profiles document need for culvert replacement
plunge pool
Gradient immediately below culvert = 70 ft mi/mi (!)Bottom consists of rubble and rocky ledges
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High, steep, eroded banks
T l f hTotal critter count in 300 ft reach = 5
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Acknowledgements
MiCorps VSMP grant and Dr. Paul SteenD J S l USACEDr. James Selegean, USACE
Barbara Lukacs GrobWhite River Watershed Partnership
VolunteersVolunteersMuskegon Community College