Analytical solution of earth dam with upstream blanket

In the present work, the problem of earth dam with upstream blanket is mathematically studied, to find effect of the blanket length on each of discharge and head loss due to blanket. It was found that mathematical solution is valid for the relative depth of the impervious layer ranging from 0.014 to 0.164. The recommended mathematical solution is compared with that given by Rezk and Nasr [1] and it is clear that mathematical results tends to experimental when (d/l)⩾0.60. Also head loss due to blanket in case of mathematical and experimental work is presented.