Translations:Versickerung und Retention/16/en
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- Dig a 50 x 50 cm wide and approx. 30 cm deep pit. Important: Do not enter the pit to avoid compression!
- Cover the soil with a gravel layer to prevent soil flotation. Insert a measuring rod into the ground. 10 cm above the pit bottom place a mark on the measuring rod.
- Now fill the pit with water and replenish for 1-2 hours regularly (e.g. garden hose).
- Fill water up to the mark. After 10 minutes, fill as much water as necessary to raise the water level back to the mark using a measuring bucket. The soil permeability can be estimated from the quantity of refilled water.
- Repeat step 4 as many times (at least 3 times), until a consistent value is established.
Evaluation:
Water quantity < 1.5 litres in 10 minutes: little infiltration possible (silt)
Water quantity = 1.5 litres in 10 minutes: infiltration possible (silty sand)
Water quantity > 3 litres in 10 minutes: good infiltration possible (sand, gravel)
