ABSTRACT
Field characterization of soil hydraulic properties is an important first step in solving soil water and solute transport problems. Ponded ring infiltrometers and tension infiltrometers are experimental devices designed for in situ measurement of soil hydraulic parameters. According to Green and Topp,[1] double ring infiltrometer is one of the most popular methods for estimating saturated hydraulic conductivity. Tension infiltrometers are also gaining more popularity in estimating soil hydraulic properties and in documenting macropore and preferential flow.[2] This entry provides a brief overview of the recent development and application of ring and tension infiltrometers for soils and hydrologic studies.
