Astm D338518 Pdf |link| -

Hook gauges, float valves, or graduated scales to measure water volume or level drops over precise increments of time. Step-by-Step Testing Methodology

of soils using a double-ring infiltrometer. This method is most effective for relatively uniform, fine-grained soils and is typically used for applications like irrigation studies, septic field evaluations, and stormwater management. The University of Utah 1. Equipment and Site Preparation astm d338518 pdf

: It is best suited for relatively uniform fine-grained soils. It may be unreliable in very pervious soils (hydraulic conductivity is greater than 10 to the negative 2 power cm/s) or very impervious soils ( ASTM International Operational Requirements Astm D3385-18 | PDF | Liquids | Soil - Scribd Hook gauges, float valves, or graduated scales to

The "double-ring" design is critical for accuracy because it forces water in the inner ring to flow . The outer ring acts as a buffer, saturating the surrounding soil to prevent lateral (sideways) spreading from the inner measurement area. Requirement under ASTM D3385-18 Method Constant Head Method (water level is kept steady) Ring Depth Driven typically to 150 mm (6 inches) Measurement The University of Utah 1

: It may produce unreliable results in very pervious soils (hydraulic conductivity >10-2is greater than 10 to the negative 2 power cm/s) or very impervious soils (