This project concerns the computations required to determine the drawdown for the retention/detention of ponds.Drawdown refers to the volume of water in a pond that decreases as the water flows out.The falling head Ski de fond - Equipement - Bottes - Skate equation has many applications and can be used to sunglass case calculate the drawdown of a pond through various shaped openings.In particular, we analyze four outflow structures: a rectangular-notch weir, a v-notch weir, a round orifice, and an underdrain.
For each instance, we modify the falling head equation to reflect the shape of the respective orifice.