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Porosity, Permeability, Capillarity

Porosity, Permeability, Capillarity. POROSITY. ANGULAR. ROUND. ROUNDNESS. Porosity - The amount of space in between sediments. Porosity is determined by:. 1. Shape - Well rounded particles have greater porosity than angular. POROSITY. UNPACKED. PACKED. PACKING.

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Porosity, Permeability, Capillarity

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  1. Porosity, Permeability, Capillarity

  2. POROSITY ANGULAR ROUND ROUNDNESS Porosity - The amount of space in between sediments. Porosity is determined by: 1. Shape - Well rounded particles have greater porosity than angular.

  3. POROSITY UNPACKED PACKED PACKING 2. PACKING- The more closely packed the particles the lower the porosity.

  4. POROSITY SORTING 3. SORTING- - If all particles are the same size they are sorted. - If the particles are different sizes they are unsorted (poorly sorted) - The more sorted the higher the porosity

  5. Particle Size alone does NOT affect porosity!!!!! (Shaping, Packing, Sorting does)

  6. PERMEABILITY PARTICLE SIZE Permeability • Ability of water to pass through • Affected by: packing and particle size • Tighter packing and Smaller particles = less permeability • Looser Packing and Larger particles = more permeability

  7. Other things about Permeability Permeability Rate – How fast a fluid can flow through a material Impermeability (not permeable) is due to: A. Tightly packing of particles B. Cementing of particles by clay C. Cementing of particles by ice

  8. PERMEABILITY

  9. Clay is impermeable – water will not flow through easily

  10. CAPILLARITY PARTICLE SIZE Capillarity Capillarity- Water sticks to the materials that it is passing through. Capillarity Water - Water stored in the zone of aeration Capillarity causes water to move upward from the water table (capillary action) Capillarity increases with a decrease in particle size.

  11. Infiltration rate Infiltration rate Permeability Slope Porosity Infiltration rate Soil Storage Saturation INFILTRATION Infiltration refers to water soaking into the ground: Infiltration rate

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