Štibinger J.
Abstract
The saturated hydraulic conductivity is one of the most important indicators in the irrigation and drainage policy of
water management of paddy fields and for its determination only direct measurement should be used. Indirect
methods, which are derived from the soil textural characteristics, don’t need to give truly values. Simple field
method of determination of the saturated hydraulic conductivity of surface soil layers on paddy fields, during the
cycle of flooded period, by direct terrain experimental measurements with help of single ring infiltrometr is viewed
in this paper. By this method were measured saturated hydraulic conductivities on Taoyuan’s paddy fields in Taipei
(Taiwan) during the cycle of flooded period. The results, obtained by this terrain experimental method, with use of
the nonlinear regression, actually with help of the Marquardt search algorithm were successfully compared with the
results of laboratory measurements on the “undisturbed” core samples.
Key words:
Saturated hydraulic conductivity, paddy fields, water table, terrain experimental measurements, ring
infiltrometer, Darcy’s law, time series analysis