Water Balance Components

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Water Balance Components
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http//www.srs.fs.usda.gov/gallery/images/5_rain_g
auge.jpg
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DBHydro

• State Plane Coordinates
• High Accuracy Reference Network (HARN)
• Refinement of NAD83

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DBHydroRainfall Stations

• Approximately 600 stations

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Spatial Distribution of Average Rainfall
http//sflwww.er.usgs.gov/sfrsf/rooms/hydrology/co
mpete/obspatialmapx.jpg
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Voronoi/Thiessen Polygons
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Evaporation Pan
www.photolib.noaa.gov/ historic/nws/wea01170.htm
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Pan Evaporation

• Pan Coefficients 0.58 0.78 (get hotter than
  lake)
• Transpiration
• Potential Evapotranspiration (water may not be in
  soil)
• Thornwaite Equation

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Watersheds
http//www.bsatroop257.org/Documents/Summer20Camp
/Topographic20map20of20Bartle.jpg
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Watersheds
http//www.bsatroop257.org/Documents/Summer20Camp
/Topographic20map20of20Bartle.jpg
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Stage
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Stage Recorder
http//gallatin.humboldt.edu/brad/nws/assets/drum
-recorder.jpg
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Stream Gauging

• Measure velocity at 2/10 and 8/10 depth
• Q vA
• Rating curve
• Q vs. Stage

http//www.co.jefferson.wa.us/naturalresources/Ima
ges/StreamGauging.jpg
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River Hydrograph
http//cires.colorado.edu/lewis/epob4030/Figures/U
seandProtectionofWaters/figures/ColoradoRiverHydro
graph.gif
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http//www.nws.noaa.gov/om/hod/SHManual/SHMan040_r
ating.htm
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Recurrence Interval

• T n1 /m
• T recurrence interval
• n number of data
• m rank (highest to lowest)
• P 1/T
• http//serc.carleton.edu/quantskills/methods/quant
  lit/RInt.html

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Well Hydrograph
http//wy.water.usgs.gov/news/archives/090100b.htm
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http//www.prescottcreeks.org/programs/watson20wo
ods/Inv20and20Mon/monitoring20well.htm
http//www.water.az.gov/dwr/Content/Find_by_Progra
m/Hydrology/WQARF/content/Reports/Well_Images/MWwi
thNamePlate.JPG
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Textbook Errata

• http//members.cox.net/ground-water/errata.pdf