Large zero-tension plate lysimeters for soil water and solute collection in undisturbed soils

Study #279: Characterizing Solute Movement in Coarse-textured, Leaching-vulnerable Soils with Zero-tension Column Lysimeters

Eff ects of Soil Hydraulic and Transport Parameter Uncertainty on Predic ons of Solute Transport in Large Lysimeters

Advanced numerical simula on models can poten ally help improve guidelines for irriga on and salinity management. Many simula on model parameters have considerable uncertainty, and ideally that uncertainty should be refl ected in model predic ons and recommenda ons. In this work, we inves gate solute transport predica on intervals that can be generated by propaga ng model parameter uncertainty ...

Construction and Performance of Large Soil Core Lysimeters

This may cause an unrealistic soil moisture regime and may effect crop growth. A method was developed to obtain large undisturbed soil cores To more closely represent an uninterrupted soil coland instrument those cores to collect vadose zone leachate data under agricultural field conditions. Twenty undisturbed soil core lysimeters umn at the point of leachate collection, a vacuum extracwere con...

Comparison of Three Methods to Calibrate TDR for Monitoring Solute Movement in Undisturbed Soil

Time domain reflectometry (TDR) is rapidly becoming a popular method for measuring solute concentrations in the laboratory as well as in the field. Success or failure of TDR to represent solute resident concentrations depends on the accuracy of the invoked calibration. In this study, we compared three commonly used calibration methods that relate the impedance, Z+ as measured with TDR, to the s...

Numerical Analysis to Investigate the Effects of the Design and Installation of Equilibrium Tension Plate Lysimeters on Leachate Volume

steel porous plates. Various control options for the tension applied to these porous plates have been advocated. The composition and quantity of leachate as it moves down through The simplest being zero tension, where no capacity to the vadose zone is seldom measured directly because sampling in this unsaturated zone at the depths required has proven to be extremely exert a tension on the plate...