Summary & Purpose
In a sequence of one-step outflow/inflow experiments, this study examines the effects of salinity on soil hydraulic properties with the goal of developing a better understanding of how to predict salinity’s impacts on soils. The results of this study are compared to estimates obtained using the Hydrus 1-D model for soil water and solute transport. The model assumes a decline in hydraulic conductivity, K, caused by solution chemistry, is constant over the entire hydraulic conductivity function, K(θ), and equal to a constant reduction factor established at saturation. In contrast with the model assumptions, the results of this study show an increase in the solution chemistry’s effect on K with decreasing soil moisture, θ. These findings demonstrate that current models that exclude solution chemistry, or models that assume a constant K reduction for the entire K(θ) function, may be overestimating drainage, recharge, or bare soil evaporation.
This research used undisturbed soil cores and simulated irrigation water with decreasing electrical conductivity (EC) from 20 to 0.25 dS m-1 and sodium adsorption ratio (SAR) held constant. Data for directly measured outflow/inflow experiments and field samples, as well as inversely fit model estimates of soil hydraulic parameters and their uncertainty are provided as part of this dataset.
Date of Publication or Submission
Colorado Agricultural Experimental Station in collaboration with the Integrated Decision Support Group at Colorado State University.
Single Dataset or Series?
*.csv and *.txt
See Huber et al_2021 Readme_Metadata.xslx
Map Area Coordinate System
13 S 731839 4218762
2011 with a smaller subset of legacy soils collected in 2002
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Huber, David P.; Butters, Greg L.; and Garcia, Luis A., "Dataset for Unreconciled Effects of Salinity on Draining and Wetting Functions in Unsaturated Soils" (2022). Geosciences Research Data. 6.