Double Ring Infiltrometer Diagram. Place the inner ring with the cutting edge facing down on the ground. Infiltration test data recorded in the field are summarized in the following table and is included within appendix b including the graph of infiltration rate versus elapsed time.
E is base of natural logarithms napierian base. In soils the dri is a commonly used instrument 3 figures h. Download scientific diagram schematic sketch of the double ring infiltrometer.
The rings incorporate a welded double edge on the top for increased stability when driving them into the soil.
The rate of infiltration is determined as the amount of water per surface area and time unit that penetrates the soil. However other diameters may be used. F o is infiltration rate at the beginning of storm. Outer ring diameter id of 4 14 inches 1079 cm outer ring height 6 inches tall 4 inches 101 cm with water on top of the soil when inserted to depth limit ring.