Single Pool Reservoir with Spillway
Single Pool Reservoir means the operations of this reservoir are not multiple pools for different uses. This reservoir provides water deliveries to a single water demand input and is constrained by an upper and lower bound on volume capacity. If the water level in the reservoir rises above the upper limit (spillway crest), then the weir equation is employed to discharge water uncontrolled from the reservoir. If the reservoir level begins to approach the lower boundary, then the water request will be curtailed. The default upper and lower bounds in the reservoir element are not used in this model.
A key component in this model is the calculation of uncontrolled spillway flows over the spillway. Extra timesteps are added to the model to interrupt the clock on non-scheduled timesteps in order to more accurately calculate the spillway flows.
Reservoir Operations Plot:
Spillway Flows Plot:
Inside the model, looking at the reservoir operations logic: