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Hydraulic Conductivity
Chapter 6
Bernouli’s Equation
piezometer
∆ hydraulic gradient
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Flow Regimes
1 k
Hydraulic Conductivity Chapter 6 Bernoulis Equation piezometer - - PDF document
Hydraulic Conductivity Chapter 6 Bernoulis Equation piezometer - - PDF document
2/25/2015 Hydraulic Conductivity Chapter 6 Bernoulis Equation piezometer hydraulic gradient 1 2/25/2015 Flow Regimes Darcys k Law 1 Seepage Velocity 2 2/25/2015 Seepage Velocity
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Seepage Velocity
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- 1
- Hydraulic Conductivity
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Hydraulic Conductivity
Degree of Saturation
Absolute Permeability
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Absolute Permeability (Soil Property Only) Hydraulic Conductivity (Soil / Water Property)
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Source: www.ce.texas.edu
Viscosity of Water
Source: www.ce.texas.edu
Density of Water
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Hydraulic Conductivity
- Soil Property
Soil / Water Property
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Hydraulic Conductivity
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Constant Head Test
- Falling Head Test
2.303 log
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Example
- 1
- Example
2.303 log
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Example
→
- Source: www.ce.texas.edu
Density of Water
25C
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Well Pumping Well Pumping
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Example
A 200‐mm‐diameter well that fully penetrates a 25‐m‐thick confined aquifer is pumped at a rate
- f 2000 m3/day. The drawdown in an observation
well 100 m away is 1.4 m and the drawdown in an observation well 50 m away is 4 m. What is the horizontal permeability of the aquifer?
Drawdown
h0 h s q
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Example
What would be the horizontal permeability of the aquifer if it was unconfined instead? Assume the static water level in the aquifer is 100 m above the impervious layer.
Drawdown
h0 = 100 m h s q