ABSTRACT
Time domain reflectometry (TDR) has a unique and potentially very useful ability to concurrently measure both water content (y)[1] and electrical conductivity (s)[2] in soils and other porous media. Both y and s are important physical/chemical attributes that have substantial impact on the behavior and transport of mass and energy, are critical to plant growth, and may be used to infer salinity or concentration of certain solutes in porous media. The TDR can also accurately measure s and, thus, indirectly solute concentration in water, but it is a relatively expensive tool in relation to other available methods for this application.
