Adding a Reservoir

Please watch the video to add a reservoir node to the model built in the previous tutorial. To do this, please create a copy of the model as shown in the video and please work in the With abstraction scenario

Drag and drop a Storage node on the network. Then delete the link conecting the Catchment node to the Link node. Connect the Catchment node to the Storage node and then connect the Storage node to the Link node.

Initially set the the max_volume of the storage node to 0 Mm3 and the initial_volume_pc to 0 and run the model.

Then clone the With_abstraction scenario and make a new scenario called 'Reservoir with storage and abstraction'.

In the new scenario, set the max_volume of the storage node to 6 Mm3 and the initial_volume_pc to 0.33. The reservoir will then begin the simulation at 30% full. Alternatively the initial_volume can be set at 1.8 Mm3. Either initial_volume or initial_volume_pc needs to be set.

Run the model and view the simulated_volume of the reservoir.

The resrevoir empties every dry season and fills every wet season.

Compare the simulated_flow on the demand node for the 'Reservoir with storage and abstraction' and 'With abstraction' scenario.

The storage reduced the deficit in the demand node. However, we can see that even with the storage, there are times that the demand node does not receive its full demand of 0.7 Mm3.

Exercise

We saw that under flow Scenario 1, the reservoir would empty every year. How low must the demand be for the reservoir to still have some storage volume even in the dry season?