### HYDRAULIC CONDITIONS OF SUBMERGED SMALL OVERSPILL DAMS

#### Abstract

*h*of the flow relative to the crest elevation, the unit flow discharge

*q*and the geometric height

*s*of the weir, it is possible to know whether the weir dam is submerged or unsubmerged. The study shows that a second-order equation governs the downstream depth rate

*w*. The solution of this equation is an explicit relation which permits calculating the downstream depth rate for the given values of

*h*,

*q*and

*s*. Finally, the study proposes an explicit relation for the calculation of the submersion rate

*b*when the parameters

*h*,

*q*and

*s*are known.

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