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1013-001%2018%20-%20Ch%203%20Groundwater%20-%20Part%202

1013-001%2018%20-%20Ch%203%20Groundwater%20-%20Part%202 -...

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Chapter 3 – Groundwater GEO 1013 Third Planet
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How Do We Measure Water Levels?
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WATER LEVEL MEASUREMENT Wireline Probe Reel and indicator Depth-marked cable Measurement point Land surface Two-wire electrical cable Electrode Water level
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WATER LEVEL MEASUREMENT Pressure Transducers Measurement point Land surface Transducer cable Transducer Water level
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0 c b a Elevation (msl) H Hydraulic head is: usually determined from measured depth beneath a surveyed elevation (e.g., ground surface) d
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0 c b a Elevation (msl) H d Hydraulic head is: usually determined from measured depth beneath a surveyed elevation (e.g., ground surface)
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Aquifer Dynamics
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Water table  (higher in wet  season, lower in dry season) Unsaturated zone Saturated zone (only in wet season) Saturated zone Movement of groundwater Well water level varies with seasons Rainwater infiltrates porous soil and rocks… …and flows underground toward lakes and streams.
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