American Journal of Environmental Sciences

The Effect of Air Entry Values on Hysteresis of Water Retention Curve in Saline Soil

S. Konyai, V. Sriboonlue and V. Trelo-Ges

DOI : 10.3844/ajessp.2009.341.345

American Journal of Environmental Sciences

Volume 5, Issue 3

Pages 341-345

Abstract

Problem statement: The saline soil in Northeast Thailand is caused by saline groundwater rise in unsaturated zone to accumulate as salt at soil surface. Approach: This problem had been exacerbated in the last few decades by human activities e.g., deforestation and salt mining. This salinity problem can be solved by capillary rise control of saline groundwater flow. Results: The soil water retention curve formulation was essential for the control procedure design. In this study, the soil water retention curves of saline soil samples were derived by the hanging column and pressure plate apparatus techniques. The hysteresis of the curves together with air and water entry values were scrutinized from the primary wetting and drying retention curves. Conclusion: The experimental results showed that the degree of hysteresis varies with the air entry value of the soil. The new finding can be very useful in modeling for salinity control.

Copyright

© 2009 S. Konyai, V. Sriboonlue and V. Trelo-Ges. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.