Abstract
The seepage characteristics of foundations with a downstream crack is analysed using conformal transformation technique. Two cases are investigated: a downstream vertical crack in a finite depth of pervious stratum and a downstream inclined crack of finite depth in a pervious stratum of infinite depth. Experimental verification of the flow lines with an electrolytic tank model shows satisfactory agreement with the theory. It is shown that a downstream foundation crack, irrespective of its length and inclination, has negligible effect on the seepage characteristics when the crack is at a distance equal to or greater than the depth of the pervious stratum from the downstream end of the hydraulic structure.
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