: Only the volume of water added to the inner ring is used to calculate the infiltration rate. The outer ring acts as a buffer to ensure water from the inner ring flows vertically into the soil, preventing lateral spread.
ASTM D3385-18 specifies stringent requirements for the equipment used to ensure data reliability. astm d338518 pdf
The movement of water through the soil surface, known as infiltration, is a fundamental hydrologic process. It governs the partitioning of rainfall into surface runoff and subsurface storage, influencing everything from flood forecasting and irrigation efficiency to the design of stormwater management systems and landfill liners. Accurate quantification of the infiltration rate is essential for civil engineers, hydrologists, and environmental scientists. : Only the volume of water added to
Procedure (condensed, practical steps)
ASTM D3385-18 establishes a standard field method using a double-ring infiltrometer to determine the water infiltration rate of soils. It is designed for assessing water movement in unsaturated, fine-grained soils for environmental and engineering projects, excluding highly pervious, impervious, or frozen materials. The full technical specification is available through ASTM International or authorized distributors. The University of Utah The movement of water through the soil surface,