Faisal A. Al Tabatabaie and Dhabia Sabeeh Al Waily 2017. The Effect of Impervious Layer Depth on the Uplift Water pressure beneath the Gate Location in the Hydraulic Structures . The Scientific Journal of Cihan University– Sulaimaniya. 1, 4 (Aug. 2017), 11-23. DOI:https://doi.org/10.25098/1.4.12.