Sep 05, 2016 double ring infiltrometer method is very well known and is uded very often when the groundwater table is absent. A doublering infiltrometer test must be completed if a test pit is the chosen methodology for obtaining the. This procedure can be used to track change over time. Instruction video on the use of the eijkelkamp double ring infiltrometer. In the unsaturated soild two concentric infiltrometer rings are placed at the certain depth, where the infiltration properties hydrau. Their data set includes those from the pilot infiltration test common test in washington state, pit, double ring infiltrometer, borehole tests, and hydraulic conductivity estimates from grain size distributions and cone penetrometer field measurements.
At the conclusion of the test, a shovel is used to partially dig out the wetted soil to determine the wetting depth and distance x of lateral divergence. For example, for areas with a high groundwater table, the total amount of infiltration and percolation would be rather low even though the soil matrix is capable of higher infiltration and percolation rates. The double ring infiltrometer is ideal for field testing, as well as lab use. A double ring infiltrometer is often used for measuring infiltration characteristics in the field, but the measurements are timeconsuming and tedious, especially when several tests are to be. The use of 4 dri is a standard fieldtest method 3, the most commonly used practice. Can be used as a guide on field infiltration rate reports or as a reading reference on the topic of infiltration. These references contain standard guidelines for conducting doublering infiltration tests. Double ring infiltrometer test a double ring infiltrometer consists of two concentric metal rings. A percolation test allows water movement through both the bottom and sides of the test area. Astm d3385 18 standard test method for infiltration rate.
This double ring infiltrometer set is constructed of heavy duty and durable galvanized steel and braced with welded steel supports. The double ring infiltrometer is a widely used device to measure saturated hydraulic conductivity, noted mathkmath. Table 7 basic infiltration rates for various soil types. If soil respiration was not determined, follow the instructions in step 1 of the soil respiration proce. Mar 19, 2016 the double ring infiltrometer is a widely used device to measure saturated hydraulic conductivity, noted mathkmath. Additionally, the double ring infiltrometer is an expensive piece of equipment and is the washington state department of ecology wsdoe recommends the more extensive pilot infiltration test pit, when possible, because it.
This test method describes a procedure for measuring the infiltration rate of water through inplace soils using a double ring infiltrometer with a sealed inner ring. The doublering infiltrometer test is a well recognized and documented technique for directly measuring soil infiltration rates 3,5. To appreciate the importance of infiltration determination in irrigation engineering. Analysis of doublering infiltration techniques and. Double ring infiltrometer parr and bertrand, 1960 the double ring infiltrometer is a widely used method of infiltration test used in many applications. When the scm surface area is between and 5000 square feet, two soil pit measurements are needed. The double ring infiltrometer is a simple instrument used for determining water infiltration of the soil measurements according to astm d338503 standard test method and din 19682 page 7. A doublering infiltrometer or equivalent is recommended. Rate of infiltration studied by passing the water at different time of interval and measured depth of water infiltered. It consists of two 2 stainless steel rings, measuring 12 and 24 diameter x 20 high. Determining soil infiltration rates minnesota stormwater manual. The doublering infiltrometer provides actual field measurements of the rate of infiltration of water or other liquid through soils, especially finegrained soils. Pdf development of an automated doublering infiltrometer. Procedure for double ring infiltrometer test prepare level testing area.
The rings have a double thick welded top edge for increased stability when driving into the soil. Infiltration and percolation are components of hydrologic cycle and are affected by other components. Measure the amount of water infiltrated after every 15 min in the first hour, 30 minutes for the. Pdf analysis of doublering infiltration techniques and.
Doublering infiltrometer test a doublering infiltrometer consists of two concentric metal rings. The doublering infiltrometer is often used for measuring infiltration rates, and has been described by bouwer 5 and by astm 3. Infiltration determination using double ring inflitrometer. The infiltration rate is the velocity or speed at which water enters into the soil. The purpose of the outer ring is to promote onedimensional,vertical flow beneath the inner. The rings are partially inserted into the soil and filled with water, after which the speed of infiltration is measured. The infiltrometer consists of two concentric metal rings which are driven into the soil, and of a perforated metal plate see. The 12 and 24inch rings are suggested for a double ring infiltrometer installation. Does any one have standard procedure to carry out single. Percolation rate a common misunderstanding is that the percolation rate obtained from a percolation test is equivalent to the infiltration rate obtained from a single or double ring infiltrometer test. D338518 standard test method for infiltration rate of soils in field using doublering infiltrometer infiltration rate water infiltration liquid waste disposal. Exploring the flow of water through soils activity overview students measure water flow into and through soils.
Determination of design infiltration rates for the sizing of. Additionally, the doublering infiltrometer is an expensive piece of equipment and is the washington state department of ecology wsdoe recommends the more extensive pilot infiltration test pit, when possible, because it. The double ring infiltrometer is a simple instrument that is used to. Procedures outlined in astm d509302, field measurement of infiltration rate using a doublering infiltrometer with a sealedinner ring, may be required in addition to those listed below. Astm d3385 18 standard test method for infiltration rate of. Basic infiltration rate mmhour field infiltration test. The same 6inch diameter ring left in place from the soil respiration test can be used for the infiltration test.
The infiltrometer also may be installed in a trench excavated in dry or stiff soils. The doublering infiltrometer is designed to meet standards for conducting infiltration of water into soils in the field. Soil infiltration testing is a type of field test conducted by an engineer, geologist, or soils scientist to determine the infiltration. If infiltration rate measurements are made, a minimum of one infiltration test in a soil pit must be completed at the elevation from which exfiltration would occur i. These references contain standard guidelines for conducting double ring infiltration tests. Determination of design infiltration rates for the sizing.
Usually as native plants mature and their roots spread, infiltration changes. A standard fieldtest method for determining infiltration rates by mans of single or doublering infiltrometers is described and the construction, installation, and operation of the infiltrometers are discussed in detail. Standard test method for field measurement of infiltration. Bouwer 5 describes the doublering infiltrometer as often being constructed from thinwalled steel pipe with the inner and outer cylinder diameters being 20 and 30. Determining soil infiltration rates minnesota stormwater.
The astm d 3385 standard test method for infiltration rate of soils in field using doublering infiltrometer states in the significance and use section. A field method for measurement of infiltration usgs publications. The purpose of the double ring is to insure the downward flow of movement of water to insure proper measurements. The double ring infiltrometer is suitable for almost any type of soil and is applied. Infiltration and percolation are two related but different processes describing the movement of moisture. The outer ring helps to reduce the lateral movement of water in the soil. The double ring infiltrometer is a widely used method of infiltration test used in many applications. Astm d 338509 standard test method for infiltration rate. Estimation of saturated hydraulic conductivity from double.
A doublering infiltrometer is often used for measuring infiltration characteristics in the field, but the measurements are timeconsuming and tedious, especially when several tests are to be. After the test holes are presoaked, each test hole is filled with 612 inches of water. A doublering infiltrometer test must be completed if a test pit is the chosen methodology for obtaining the soil characterization and soil samples. Does any one have standard procedure to carry out single ring. Surface infiltration devices include single and double ring infiltrometer designs of the open or closed type.
The principle of the test is based on the measurement of a surface vertical flow rate of water which infiltrates the soil under the influence of a positive hydraulic head. Soil infiltration testing protocol page 4 of 8 rubber mallet, and log sheets for recording data. Double ring infiltrometer myers soil field testing equipment. The use of 4 dri is a standard field test method 3, the most commonly used practice. The purpose is to create a onedimensional flow of water from the inner ring, as the analysis of data is simplified.
Water in the outer ring keeps the flow in the inner ring vertical and the drop in water level in the inner ring is used to establish the vertical infiltration rate. The test provides reliable data for use in environmental and other geotechnical studies, such as liquid waste disposal. Astm d3385 standard test method for infiltration rate of. Table 2 values of double ring infiltrometer test variables used for 864 simulations variable modelledvariablevalues h. The double ring infiltrometer is designed to meet standards for conducting infiltration of water into soils in the field. Timber 75 x 75 x 400 hessian 300 x 300 or jute cloth. Pdf double ring infiltrometer test odhiambo odhiambo. A standard fieldtest method for determining infiltration rates by mans of single or doublering infiltrometers is described and the construction, installation. The infiltrometer is installed by driving into the soil. The rings incorporate a welded, double edge on the top for increased stability when driving them into the soil. If interested, purchase a double ring infiltrometer for infiltration testing. How to convert doublering infiltration test results to. Cylinder infiltrometer test method maryland departh.
What is the double ring infiltrometer calculations. If you suspect you might have this problem you can use an alternative procedure which is a bit more complicated, but also more efficient. Soil hydraulic properties affect many important soil and. Where infiltration testing is to be performed as directed by the ea or in the wqmp, the measured infiltration rate of the underlying soil determined using either the must be single ring infiltrometer test as described in astm d 5126, section 4. To successfully complete field test infiltration determination using a double ring inflitrometer. The most common method to measure the infiltration rate is by a field test using a cylinder or ring infiltrometer. This test method describes a procedure for field measurement of the rate of infiltration of liquid typically water into soils using doublering infiltrometer. Note some states might require 6 and 12 rings or 12 and 24 infiltration rings astm 3385 as regulations change from state to state if larger rings are required, the turftec infiltrometer is still very useful in qualifying the site that all soils are alike confirmatory testing and have consistent infiltration rates, allowing fewer. The 12 and 24inch rings are suggested for a doublering infiltrometer installation. A method for automating data collection from a doublering. Infiltration test the infiltration test is generally performed after the first respiration measurement. These infiltration rings are ideal for taking astm infiltration tests on all areas and match the astm 3385 test.
D338503 standard test method for infiltration rate of soils in field. Infiltration is the process by which water arriving at the soil surface enters the soil. Please see applicable chapters for further requirements. If a double ring infiltrometer is desired, a small ring is installed, centered inside a larger ring.
A standard field test method for determining infiltration rates by mans of single or double ring infiltrometers is described and the construction, installation, and operation of the infiltrometers are discussed in detail. A doublering infiltrometer test estimates the vertical movement of water through the bottom of the test area using a larger surface area than a cased borehole infiltration test. The procedure consists of conducting a conventional single ring infiltration test. The double ring infiltrometer is often used for measuring infiltration rates, and has been described by bouwer 5 and by astm 3. The doublering infiltrometer test is a well recognized and. Doublering infiltrometer measurement instructions basic checklist 1. This technique is suitable to longterm soil infiltration testing. The rings are driven into the ground to preclude leakage, and then filled with water. A double ring infiltrometer test estimates the vertical movement of water through the bottom of the test area using a larger surface area than a cased borehole infiltration test. This test method describes a procedure for measuring the infiltration rate of water through inplace soils using a doublering infiltrometer with a sealed inner ring. Field data collected must be representative of the percolation or steadystate infiltration rate. A double ring infiltrometer test must be completed if a test pit is the chosen methodology for obtaining the soil characterization and soil samples. If water is flowing in onedimension at steady state condition, and a unit gradient is present in the underlying soil, the infiltration rate is. Astm d3385 18 standard test method for infiltration rate of soils.
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