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→Calculations
==Calculations==
==Calculations==
[[File:DRI.xlsx]]
[[File:DRI.xlsx]]
Using the DRI (double ring infiltrometer) spreadsheet
Using the DRI (double ring infiltrometer) spreadsheet
===The Solver add-in===
===The Solver add-in===
##‘Solve’!
##‘Solve’!
##The solver produces the optimized S and A values to match the model to the field data.
##The solver produces the optimized S and A values to match the model to the field data.
##The saturated hydraulic conductivity (K) is approximated by dividing A by 2/3, where A is the slope of the linear part of the graph. i.e when infiltration rate has stabilized.
##The saturated hydraulic conductivity (K) is approximated by dividing A by 2/3, where A is the slope of the linear part of the graph. i.e when infiltration rate has stabilized.
==To review==
==To review==
https://www.astm.org/Standards/D3385.htm
https://www.astm.org/Standards/D3385.htm