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Designation: D 3385— 94 Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer' This standard is issued under the fixed designation D 3385;the number immediately following the designation indicates the year of original adoption or,in the cast of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(c)indicates an editorial change since the last revision m reapproval. r This standard has been approved jor use 6y agencies of the Department of Defense. 1. Scope 2. Referenced Documents 1.1 This test method describes a procedure for field mea- 2.1 ASTM Standards: surement of the rate of infiltration of liquid (typically water) D 653 Terminology Relating to Soil, Rock, and Contained into soils using double-ring infiltrometer. Fluids' 1.2 Soils should be regarded as natural occurring fine or D 1452 Practice for Soil Investigation and Sampling by coarse-grained soils or processed materials or mixtures of Auger Borings' natural soils and processed materials,or other porous materials, D 2216 Method for Laboratory Determination of Water and which are basically insoluble and are in accordance with MuimresZ Content of Soil, Rock, and Soil-Aggregate requirements of 1.5. 1.3 This test method is particularly applicable to relatively D 2488 Practice for Description and Identification of Soils uniform fine-grained soils,with an absence of very plastic(fat) (Visual-Manual Procedure)' clays and gravel-size particles and with moderate to low D 5093 Test Method for Field Measurement of Infiltration resistance to ring penetration. Rate Using a Double-Ring Infiltrometer With a Sealed 1.4 This test method may be conducted at the ground Inner Ring' surface or at given depths in pits, and on bare soil or.with 3. Terminology vegetation in place, depending on the conditions for which infiltration rates are desired. However, this test method cannot 3.1 Definitions: be conducted where the test surface is below the ground water 3.1.1 incremental infiltration velocity—the quantity of flow table or perched water table. per unit area over an increment of time. It has the same units 1.5 This test method is difficult to use or the resultant data as the infiltration rate. may be unreliable,or both,in very pervious or impervious soils 3.1.2 infiltration—the downward entry of liquid into the (soils with a hydraulic conductivity greater than about 10-' soil. cm/s or less than about 1 X 10-6 cm/s) or,in dry or stiff soils 3.1.3 infiltration rate—a selected rate, based on measured that most likely will fracture when the rings are installed. For incremental infiltration velocities,at which liquid can enter the soils with hydraulic conductivity less than 1 X 1076 cm/s refer soil under specified conditions, including the presence of an to Test Method D 5093. excess of liquid.-It has the dimensions of velocity (that is, 1.6 This test method cannot be used directly to determine CM3 cm 2 h-t = cm h-1). the hydraulic conductivity (coefficient of permeability) of the 3.1.4 infiltrometer—a device for measuring the rate of entry soil (see 5 2) of liquid into a porous body, for example, water into soil. 1.7 The values stated in SI units are [o be regarded as the refer to Terminology definitions3.1.5 For 653of �er terms used in this test method, standard. 1.8 rhis standard does not purport to address all of the 4 Summary of Test Method safety concerns, if any, associated with its use. It is the 4 1 The double-ring infiltrometer method consists of driving responsibility of the user of this standard to establish appro- g priate safety and health practices and determine the apphca" two open cylinders, one inside the other, into the ten bility of regulatory limitations prior to use. partially filling the rings with water or other liquid, andd then _ maintaining the liquid at a constant level.The volume of liquid added to the inner ring,to maintain the liquid level constant is This test method is under the jurisdiction of ASTM Committee D-18 on Soil the measure of the volume of liquid that infiltrates the soil.The and Rock and is the d-ima responsibility of Subcommittee D18.04 on Hydrologic Properties of Soil and Rock. Current edition approved Sept.15,1994-Published November 1994.originally Annual Book of ASTM Standards,Vol 04.08. published as D 3385—75.cast previous edition D 3385—88. Capynghl®ASTM 1Mem3tion2l,inn Bart Hamm,Drive,M Bar C700.Wast Coesbahoeken.PA 1962&2959.tattled States 371