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Line 48: − ===Filling the permeameter===+ − #Check that the three-part inner tube is firmly pressed down to its fullest extent, and that the indicator is at the bottom of the indicator scale on the top of the reservoir. − #The permeameter must be secure and upright for filling. One way to achieve this is to place the permeameter into the well and stabilize by nesting the bushing into the tripod. − #*The disadvantage is that the permeameter must not jostle within the well and care must be taken not to pour water down the outside of the permeameter into the hole directly. − #*The advantage is that the top of the reservoir can be easily seen and accessed. − #At the base of the reservoir there is a knob with a notch in the side. Turn the know so that the notch is at 12 o’clock. This connects the inner and outer chamber within the reservoir. − #On the top of the reservoir open the short hose and remove the rubber plug. − #Water can then be poured into the reservoir using the recessed area in the top. − #When the reservoir appears full, tap the sides gently to dislodge any air bubbles, close off the hose and ensuring that a small excess of water is contained within the recess, replace the plug.
→Using a permeameter
[[File:Infiltration_Testing_1.jpeg|thumb|Infiltration testing with a Guelph Permeameter at a site in Glen Williams, Ontario]]
[[File:Mariotte Guelph.jpg|thumb|The water level within the well is determined by the height of the air tube within the permeameter, only when bubbles pass can the water drop from the reservoir above.]]
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==Principle==
==Principle==
A variety of field permeameters have been developed locally, and are readily available to purchase or to hire.
A variety of field permeameters have been developed locally, and are readily available to purchase or to hire.
They speed up analysis (somewhat) and add some degree of accuracy to a simple [[percolation test]] by employing the [https://en.wikipedia.org/wiki/Mariotte%27s_bottle Mariotte bottle] principle to maintain a steady water level (fixed head condition) within the test well.
They have relative benefits and limitations in their use, and as they are proprietary devices, they each have manufacturers specific recommendations for their use.
They have relative benefits and limitations in their use, and as they are proprietary devices, they each have manufacturers specific recommendations for their use.
Sampling strategies for their use is found on [[Design infiltration rate]]
Sampling strategies for their use is found on [[Design infiltration rate]].
==Measurements==
==Using a permeameter==
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===Packing list===
===Packing list===
*Permeameter
*Permeameter
Find a clear flat piece of ground (or a picnic table) and assemble all of the parts horizontally to reduce strain on the connectors.
Find a clear flat piece of ground (or a picnic table) and assemble all of the parts horizontally to reduce strain on the connectors.
[[File:Infiltration_Testing_1.jpeg|thumb|Infiltration testing with a Guelph Permeameter at a site in Glen Williams, Ontario]]
==External links==
==External links==