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Line 1: − [[File:Double ring.JPG|thumb|Double ring]]+ + − + Line 32:
Line 33: − [[File:DRI.xlsx]]+ + + − Using the DRI (double ring infiltrometer) spreadsheet:
→Calculations
[[File:Double ring.jpg|thumb|Schematic diagram of double ring infiltrometer illustrating the infiltration of water both vertically, and laterally particularly from the outer ring.]]
[[File:Double ring.jpg|thumb|Schematic diagram of double ring infiltrometer illustrating the infiltration of water both vertically, and laterally particularly from the outer ring.]]
[[File:Bill's double ring.jpg|thumb|Double ring infiltrometer in use]]
[[File:Bill's double ring.jpg|thumb|Double ring infiltrometer in use]]
[[File:Double ring.JPG|thumb|Double ring]]
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==Principle==
==Principle==
Using a double ring infiltrometer is a relatively simple (although slow) method of measuring soil the [[hydraulic conductivity]] or ''[[design infiltration rate]]'' of a [[soil]].
==Measurements==
==Measurements==
==Calculations==
==Calculations==
Download a copy of our DRI (double ring infiltrometer) spreadsheet for this process. Directions are provided below.
{{#l:DRI.xlsx|Double ring to K}}
===The Solver add-in===
===The Solver add-in===
To use the calculation spreadsheet, an additional add-in must be enabled in your Excel program.
To use the calculation spreadsheet, an additional add-in must be enabled in your Excel program.