Abstract
Relationships of soil water tension 0 (h) and unsaturated hydraulic conductivity K(h) with soil water content are needed to quantify plant available water and to model the movement of water and solute in and through soil. These relationships are used as basic inputs in various soil hydraulic simulation models and are affected by various soil hydraulic parameters, such as residual water content, main air entry value and pore size distribution index etc. In order to use various simulation models for better design and management of irrigation and drainage projects, effects of the above hydraulic parameters on soil water retention and hydraulic conductivity curves need to be studied carefully. This paper discusses the influence of soil hydraulic parameters on the 6 (h) and K(h) curves.
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