Astm D338518 Pdf Free

A single-ring infiltrometer often overestimates infiltration rates because water diverges laterally (sideways) once it passes the bottom edge of the ring. The double-ring design solves this issue:

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.

Practical recommendations (field best practices)

ASTM D3385-18 is the standard test method for the . This standard is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the definitive guide for engineers and scientists needing to assess how quickly water or other liquids penetrate the ground. It provides a standardized procedure for setting up equipment, conducting the field test, and calculating the infiltration rate.

Comprehensive Guide to ASTM D3385-18: Standard Test Method for Infiltration Rate of Soils Using Double-Ring Infiltrometer astm d338518 pdf

The ASTM D3385-18 PDF is priced at approximately €51–€61 (approx. $55–$65 USD) when purchased through authorized distributors. Options include:

The designation "18" indicates that the standard was last reviewed, updated, or reapproved in the year 2018. This specific testing standard is governed by ASTM Committee D18 on Soil and Rock and falls directly under Subcommittee D18.04 on Hydrologic Properties of Soils & Rocks. Core Objectives of the Test

It is poorly suited for highly porous gravels (water drains too fast to measure) or highly plastic, stiff clays (where driving the rings cracks the soil and creates artificial bypass pathways).

To quantify the flux of water moving vertically into a soil surface. It provides a standardized procedure for setting up

is the standard test method for measuring the infiltration rate of soils in the field using a double-ring infiltrometer. It is primarily used for fine-grained soils to determine how quickly water or other liquids penetrate the ground surface. Core Test Methodology

The testing area should be nearly level. If you want to test the infiltration rate of subsoils rather than the surface layer, you must carefully excavate a pit to the desired depth, ensuring minimal disturbance to the exposed soil.

The test should continue until the infiltration rate stabilizes. This means that the volume of water infiltrating the soil over consecutive time intervals becomes relatively constant (typically for a period of several hours). Phase 4: Recording Variables

By measuring the rate of fluid volume loss , engineers isolate the one-dimensional vertical infiltration rate. 3. Scope, Applications, and Limitations Ideal Soil Types frequent time intervals (e.g.

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.

Record the water level or volume consumed at regular, frequent time intervals (e.g., every 5, 10, 15, or 30 minutes).

For manually checking water levels or recording the exact volume of water being consumed over time. 5. Auxiliary Tools Hand augers (for soil investigation and setup) A stopwatch or timer