Astm D338518 Pdf Jun 2026

I=VA×Δtcap I equals the fraction with numerator cap V and denominator cap A cross delta t end-fraction

Open metal cylinders, usually constructed from steel or aluminum, with a sharpened bottom edge to ease soil penetration. astm d338518 pdf

A primary challenge in field infiltration testing is the divergence of flow lines. In a single-ring infiltrometer, water infiltrates vertically but also spreads laterally due to capillary forces and the geometry of the wetting front. This lateral spreading artificially inflates the measured infiltration rate because the wetted area increases with depth. I=VA×Δtcap I equals the fraction with numerator cap

The volume of water entering the soil per unit area per unit time, typically expressed in inches per hour (in/hr) or centimeters per hour (cm/hr). Inner Ring: Typically 300 mm (12 inches) in diameter

Fabricated from smooth, rigid metal (such as steel or heavy-gauge aluminum). Inner Ring: Typically 300 mm (12 inches) in diameter. Outer Ring: Typically 600 mm (24 inches) in diameter.

: Center the inner ring inside the outer ring and drive it to a similar depth. Vertical Alignment

Measure the drop in water level over specific time intervals.