Notes
Slide Show
Outline
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Lecture 7 & 8
  • Refraction of q
  • Equivalent K for fractured media
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Refraction of q
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Example
  •     Downward seepage occurs from a shallow pond to a water table. A conservative traces is introduced at point A. Calculate the location of tracer appearance at the water table and the time it takes. Neglect dispersion, diffusion and assume subsurface fully saturated.
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K for fractured PM
section 2.2.4 text
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"Storage in unconfined aquifers"
  • Storage in unconfined aquifers
  • & 1-D flow equation
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Moisture distribution & water retention curve
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Flow equation
  • Assume horizontal flow  h does not depend on z
  • Horizontal aquifer base




  • Mass balance
  • ROMA= net mass flux in



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Flow Equation continued
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Applications
  • Flow through embankment (example 2.3.1)


  • Agricultural drains (example 2.3.2)
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Lecture # 9
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2-d flow in unconfined aquifers
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Radial flow
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Example 2.3.3 txt
  • Consider a pumping well in an unconfined aquifer receiving a recharge at a rate W. The saturated thickness beyond the radius of influence of the well (R) is H0 examine drawdown distribution and value of R.