I=ΔVA⋅Δtcap I equals the fraction with numerator cap delta cap V and denominator cap A center dot delta t end-fraction
: Drive the outer ring into the soil to a depth of approximately 150 mm (6 in.). Concentric Placement
Assessing irrigation requirements and leaching efficiencies.
ASTM D3385-18 is the standard test method established by ASTM International for determining the infiltration rate of soils using a double-ring infiltrometer. The "18" denotes the year of its last major revision or reapproval. astm d338518 pdf
Determining the feasibility of groundwater recharge sites and managing liquid waste disposal.
Cylinders made of dynamically stable metal (such as steel or aluminum). Inner Ring: Typically 12 inches (30 cm) in diameter. Outer Ring: Typically 24 inches (60 cm) in diameter.
The legitimate cost (≈$60) is minor compared to the cost of a failed project or failed regulatory inspection. I=ΔVA⋅Δtcap I equals the fraction with numerator cap
Comprehensive Guide to ASTM D3385-18: Standard Test Method for Infiltration Rate of Soils Using Double-Ring Infiltrometer
Because the lateral flow requirement is met by the outer ring, the water infiltrating from the inner ring is forced to move almost exclusively in a true vertical direction.
ASTM also offers a "READ ONLY" access for a lower fee (approx. $15) via their ASTM Reading Room, but printing or saving is restricted. The "18" denotes the year of its last
The test continues until the infiltration rate becomes constant. Initially, dry soil will absorb water rapidly due to matric suction. As the soil becomes saturated, the rate decreases and levels off, approaching the saturated hydraulic conductivity ( Ksatcap K sub s a t end-sub ) of the soil. Calculations and Data Interpretation The infiltration rate (
Gently tamp the soil along the inside and outside edges of both ring walls to eliminate any artificial voids or paths created during driving. Place a thin layer of fine sand or a splash guard cloth inside the inner ring to prevent the incoming water from eroding or scouring the soil surface. Step 4: Adding Water and Maintaining Head
Generally around 500 mm (20 inches) tall to allow for proper soil insertion and a sufficient water head. 2. Water Supply and Measurement Systems