What is a double ring infiltrometer test?

What is a double ring infiltrometer test?

The double ring infiltrometer is a simple instrument used for determining water infiltration of the soil (Measurements according to ASTM D3385-03 standard test method and DIN 19682 page 7). The rings are partially inserted into the soil and filled with water, after which the speed of infiltration is measured.

What is a double ring infiltrometer?

The double ring infiltrometer is a simple instrument which is used to determine the infiltration rate of water into the soil. The infiltration rate is determinated as the amount of water per surface area and time unit, which penetrates the soils.

What is single ring infiltrometer?

A single-ring infiltrometer involves driving a ring into the soil and supplying water in the ring either at constant head or falling head condition. The operator records how much water goes into the soil for a given time period. The rate of which water goes into the soil is related to the soil’s hydraulic conductivity.

What is flooding type infiltrometer?

 This is most commonly used flooding type infiltrometer.  it consists of two concentric rings driven into soil uniformly without disturbing the soil to the least to a depth of 15 cm. The diameter of rings may vary between 25 cm to 60 cm.

What is the main advantage of double ring infiltrometer with respect to single ring?

They state “this conclusion differs from the results obtained by Bower and others [1951] and Schiff [1953] who found that the outer ring of the double-ring infiltrometer reduces lateral movement from the inner ring and thus gives a more accurate value for the infiltration rate.” Burgy and Luthin “attribute this …

What is infiltrometer test?

A single ring infiltrometer, falling head percolation test measures the time required for a unit depth of clear water to infiltrate into the soil from a standard size infiltrometer.

What are the types of infiltrometer?

There are two kinds of infiltrometers:

  • Flooding-type infiltrometer.
  • Rainfall simulator.

What is the difference between single ring and double ring infiltrometer?

The single ring infiltrometer involves driving a single metal ring partially into the soil and filling it with water. Double ring infiltrometers in contrast require two rings (inner and outer), which creates a one dimensional flow of water from the inner ring.

Why is double ring infiltrometer preferred over single ring infiltrometer?

Infiltration rate is important when estimates of runoff are necessary. An infiltrometer is the device used to measure the rate of water infiltration into soil. Double ring infiltrometers in contrast require two rings (inner and outer), which creates a one dimensional flow of water from the inner ring.

What are the disadvantages of double ring infiltrometer?

However, a major drawback of the double ring infiltrometer is the overestimation of saturated hydraulic conductivity in soils having macropores such as wormholes and cracks.

How do you use a single ring infiltrometer?

Popular Answers (1)

  1. A single ring infiltrometer must be inserted into the soil to a suitable depth.
  2. Select a height to which the water must be maintained during the test.
  3. Fill the ring to the desired height and start timing using a clock/stop watch.

What is a double-ring infiltrometer?

Ideal for field testing, as well as lab use, the Double-Ring Infiltrometer provides actual field measurements of the rate of infiltration of water or other liquid through soils, especially fine-grained soils in accordance with ASTM D3385.

What is An infiltrometer?

This method of testing is especially applicable to fine-grained soils that offer minimal resistance when the rings penetrate the soil. The infiltrometer consists of an inner and outer galvanized steel ring and a driving cap with centering pins. The inner ring is 12x20in (305x508mm) and the outer ring is 24x20in (610x508mm) Dia.xH.

How is infiltration rate measured?

Infiltration rate usually is determined from field data. Many dif­ ferent methods and types of equipment have been used for measuring infiltration rate, but the principal methods are flooding of basins or furrows, sprinkling (to simulate rain), and measuring water entry from cylinders (infiltrometer rings).

What is the driving cap of An infiltrometer made of?

The rings have a reinforced double-thick top edge and beveled bottom for easy driving of the infiltrometer into the soil. The driving cap is .50in (12.7mm) thick and constructed of hard alloy aluminum.