Adding a Source Representing Groundwater

In this section an Input node representing a groundwater source will be added to the reservoir system. The demand node will receive water from both groundwater and the reservoir. Groundwater is modeled as a yield.

Create a new scenario

Clone the 'Demand with treatment losses' scenario and call the new one 'Demand with GW'

Add an input node

Add an Input node below the demand node as shown below. Rename the node to 'Groundwater well'

Add groundwater input

###Notice: to maintain the same behaivior in each of the previous scenarios, the Max Fow of the input node must be set to 0 in each scenario.

This can be done by clicking on the edit button on the Max Flow attribute of the Input node.

Edit the max flow

and then by setting a Max Flow of 0 Mm3/day in the text box:

Set max flow to 0

and before saving the changes, select all scenarios so the 0 flow applies to all scenarios:

Select all scenarios

and then click on save.

Groundwater inflow setting

Next, we need to set the yield of the groundwater in this scenario. Set the Max Flow of the node to be 0.02 Mm3/day instead of 0. This will represent the maximum possible supply of the input node at each time step.

Groundwater input

Then, run this scenario.

Run the scenario

View and compare the results

Compare the simulated_volume of the reservoir to that of the 'Demand with treatment losses' scenario.

Select the scenario to compare

Compare the reservoir volume

Exercises and questions