Changes

===Data Analysis===

===Data Analysis===

NB:  The Hazen formula method of estimating soil permeability based on grain size distribution analysis is only suitable for soils with d₁₀ between 0.1 and 2.5 millimeters <ref>Hazen, A. (1893). Some physical properties of sand and gravel with special reference to the use in filtration. 4th Annual Report, State Board of Health, Boston.</ref>. The soil permeability value estimated using the Hazen method can be considered to be the measured infiltration rate of the soil, f, in mm/h:

NB:  The Hazen formula method of estimating soil permeability based on grain size distribution analysis is only suitable for soils with d₁₀ between 0.1 and 2.5 millimeters <ref>Hazen, A. (1893). Some physical properties of sand and gravel with special reference to the use in filtration. 4th Annual Report, State Board of Health, Boston.</ref>. The soil permeability value estimated using the Hazen method can be considered to be the measured infiltration rate of the soil, f, in mm/h

<math>f=C\cdot {\left (d_{10}\right )^{2}}</math>

:<math>f=C\cdot {\left (d_{10}\right )^{2}}</math>

{{Plainlist|1=Where:

{{Plainlist|1=Where:

*''d₁₀'' = the soil particle diameter for which 10% of all soil particles are finer (smaller) by weight (mm), median value of all samples tested.

*''d₁₀'' = the soil particle diameter for which 10% of all soil particles are finer (smaller) by weight (mm), median value of all samples tested.

*''C'' = is a shape factor (see below)

*''C'' = is a shape factor (see below)}}

{| class="wikitable"

{| class="wikitable"