Abstract
In the cultivated land, generally, groundwater moves in all direction. Howevernormally, we ignore one direction and approximate that condition to 2-dimensions. In case, there is springwater in the cultivated land, water table is almost always 3-dimensional. In this paper, we have analyzedthe pipe drainage effect for spring water control with a 3-Dimensional Sand Model Experiment depending onrelative installation. The results obtained are summarized as follows:
(1) Y-direction length ratio (Drain interval) of pipe drain significantly affectsthe groundwater table.
(2) In case the X-direction installation ratio (Drain interval) changes from 0.5 to1.0 and the Y-direction ratio (Drain length) changes from 0.8 to 0.6, water table will raise rapidly.
(3) Under the condition that the X-direction installation ratio is 0-0.5 and theY-direction installation ratio is 0.6-0.8, mean groundwater level nearly equal the case of the pipe draininstalled right above the spring
