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11 Cards in this Set
- Front
- Back
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Hydrogeology definition |
Study of the distribution, movement, and quality of water through soil and rock |
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Water balance |
dS/dT = flux in - flux out Storage / time |
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Steady state |
Flux in is equal to flux out |
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Recharge |
Infiltration - Evapotranspiration |
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Porosity |
The fraction of the material volume that is pore space Phi = Vpore / Vtotal |
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Typical porostiy |
Sand 25 - 50% Silt 35 - 50% Clay 40 - 70% |
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Effective porosity |
The volume of interconected pore space |
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Primary Porosity |
The porosity developed by the original sedimentation and cementation process by which the rock was created |
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Secondary Porosity |
Created by processes other than primary compaction and cementation of the sediments (fracture) |
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Dynamic Porosity |
Reduction in porosity due to chemical precipitation, bioclogging Reduction due to dissolution |
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REV |
Representative Elementary Volume Small enough to exclude landscape scale heterogeneity large enough to contain statistically representative number of pores |
