The base width of an elementary profile of a gravity dam of height H is b. The specific gravity of the material of the dam is G and uplift pressure coefficient is K. The correct relationship for no tension at the heel is given by

• A. \(\frac{b}{H} = \frac{1}{{\sqrt {G - K} }}\)
• B. \(\frac{b}{H} = \sqrt {G - K} \)
• C. \(\frac{b}{H} = \frac{1}{{G - K}}\)
• D. \(\frac{b}{H} = \frac{1}{{K\sqrt {G - K} }}\)