The British pint is about 20% larger than the American pint since the two systems are not compatible. Almost all other countries have standardized on the metric system, so the size of what may be called a pint varies depending on local custom.
It is usually measured by the depth (in mm) of the water layer that can enter the soil in one hour. An infiltration rate of 15 mm/hour means that a water layer of 15 mm on the soil surface, will take one hour to infiltrate. In dry soil, water infiltrates rapidly.
Step 7. Determine infiltration rate: 1  If the soil infiltrates the water under 1 hour, your soil is ready for a dry well, rain garden or any of the other structural stormwater projects recommended here.ecord the time: 1  Record the amount of time (in minutes) it takes for the 1 inch of water to infiltrate the soil. 2  Stop timing when the surface is just glistening. 3  If the soil surface is uneven inside the ring, count the time until half of the surface is exposed and just glistening.