|link| | Astm D338518 Pdf

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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.

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The foundational mechanics rely on separating vertical and horizontal flow vectors. When water is introduced to a single ring driven into the ground, lateral capillary forces cause the liquid to diverge outward, artificially inflating the calculated vertical velocity. astm d338518 pdf

The double-ring infiltrometer solves this problem by using two concentric cylinders:

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I’m unable to provide or share the actual PDF file for (note the correct numbering—often "D3385," not "D338518") because it is a copyrighted document owned by ASTM International. However, I can tell you a proper story about this standard: what it is, why it exists, and how it's used. Unauthorized distribution or sharing of ASTM standards may

While highly accurate for its intended scope, ASTM D3385-18 has limitations:

– Terminology Relating to Soil, Rock, and Contained Fluids D1452 – Practice for Soil Exploration and Sampling by Auger Borings D2216 – Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass D2488 – Practice for Description and Identification of Soils (Visual-Manual Procedures) D3740 – Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction D5093 – Test Method for Field Measurement of Infiltration Rate Using a Double-Ring Infiltrometer with a Sealed-Inner Ring D5126 – Guide for Comparison of Field Methods for Determining Hydraulic Conductivity in the Vadose Zone

Test principle and equipment

The test specifically measures the surface over time. It is primarily used for soils with a hydraulic conductivity between

The data collected from the inner ring is used to calculate both the incremental infiltration rate and the cumulative infiltration. Incremental Infiltration Rate The infiltration velocity (

Determining irrigation requirements and drainage efficiency. The Double-Ring Infiltrometer Apparatus It governs the partitioning of rainfall into surface

: Two concentric open cylinders (typically 300 mm and 600 mm in diameter). You will also need driving caps, a hammer, a depth gauge, and a liquid supply (usually water). Site Choice

ASTM D3385-18 is a standardized field test method published by ASTM International (formerly known as the American Society for Testing and Materials). The full title is: