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Hydraulic Head Diagram
PHTOP THTOP GHTOP PHBOTTOM THBOTTOM GHBOTTOM Reference Level THTOP=GHTOP+PHTOP THBOTTOM=GHBOTTOM+PHBOTTOM THTOP >THBOTTOM so water moves downward
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THLEFT=GHLEFT+PHLEFT THRIGHT=GHRIGHT+PHRIGHT
Reference Level THLEFT=GHLEFT+PHLEFT THRIGHT=GHRIGHT+PHRIGHT THRIGHT >THLEFT so water moves from right to left
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Piezometers are used to measure hydraulic head.
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Piezometers
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PHA A Tensiometers GHA THA B PHB GHB THB Reference Level
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30 cm A 120 cm 40 cm B 90 cm 20 cm 50 cm 30 cm Reference Level THA = GHA + PHA THA = 90 cm + 30 cm THA = 120 cm THB = GHB + PHB THB = 50 cm - 20 cm THB = 30 cm
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PH PH TH TH GH GH Reference Level Reference Level Reference Level Reference Level
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PH TH PH PH TH TH PH TH GH GH GH Reference Level GH=0 Reference Level Reference Level Reference Level
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PH TH PH PH TH TH PH TH GH GH GH Reference Level GH=0 Reference Level TH Reference Level TH GH GH PH PH Reference Level
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PH TH PH PH TH TH PH TH GH GH GH Reference Level GH=0 Reference Level TH Reference Level PH TH GH TH GH PH GH TH PH PH GH=0 Reference Level
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Reference Level
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60 PH=10 cm PH cm TH PH=15 cm GH= GH TH = Reference Level
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60 Reference Level cm PH=15 cm GH=0 cm TH =15 cm PH=10 cm GH=60 cm
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60 Reference Level cm PH=15 cm GH=0 cm TH =15 cm PH=10 cm GH=60 cm
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Reference Level 100 cm PH=0 cm GH= TH =
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100 cm 100 cm Reference Level PH=0 cm GH=0 cm TH =0 cm GH=100 cm
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100 cm 100 cm 100 cm Reference Level PH=0 cm GH=0 cm TH =0 cm
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100 cm 100 cm 100 cm Reference Level PH=0 cm GH=0 cm TH =0 cm
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