You need to login before you can view or download document
The dynamics of a shallow perched watertable on a heavy soil in the Lower Herbert Valley
By Mitchell, DC; Bohl, HP; Roth, CH; Cook, FJ
The duration and dynamics of a shallow perched watertable was measured, and
modelled and the amount of subsurface flow (interflow) from the watertable to the
in-field drains (water furrows) was quantified. A watertable model was used to test the
robustness of the measured soil hydraulic propelties and to predict the relative duration
of waterlogging between a field with and without water furrows. The presence and
duration of the shallow perched watertable agreed with other observations. The amount
of inter±1ow was calculated and was found to be only a small component of the water
balance (9%). The presence of the water furrows in the field design was found to
decrease the length of waterlogging by II days over a ISO-day period.