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Description: Seepage from canals is the most common cause of waterlogging and salinization of land in the irrigation districts of Southern Alberta (Sadler 1966 Chang 1983). Subsurface interceptor drainage along the canals is one method used to control waterlogging and salinization of land adjacent to seeping canals. However, in the water-laid soils found in the irrigation districts of Southern Alberta, the lateral conductivity through the profile can sometimes be high. Where this is found, bridging (groundwater flow across the drain) may occur and the effectiveness of the drain is reduced. A barrier is required to prevent bridging. Plastic cut-off barriers were used with some success by the Prairie Farm Rehabilitation Program (1961) to control seep age, but did not prevent the water from flowing around the bottom of the barrier. Depth to till in Southern Alberta is variable (Bowser et al. 1963) and it is not always easy to anchor the bottom of the barrier in slowly permeable material. However, if a plastic cut-off barrier were used in con junction with a subsurface interceptor drain at the toe of the barrier, one would complement the other in controlling the water table and disposal of the seepage water. The barrier would prevent bridging and would direct the groundwater to the drain, while the drain at the toe of the barrier would discharge the dammed water.

Keywords: subsurface drainage with a plastic cut-off barrier to intercept canal seepage
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Citation: Sommerfeldt, T.G. and N. Paziuk 1985. SUBSURFACE DRAINAGE WITH A PLASTIC CUT-OFF BARRIER TO INTERCEPT CANAL SEEPAGE. Canadian Agricultural Engineering 27(2):111-114.
Volume: 27
Issue: 2
Pages 111 - 114
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Date: 1985
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Coverage: Canada
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