BACK TO HELP Scenarios
Qatium allows you to run what-if scenarios in your network. As the model re-runs after every change made, it is very easy and fast to visualize the results. Below are links to the scenarios available in Qatium. Want to see more types of scenarios, contribute to our roadmap by voting for existing ideas or submitting new ones.
Contents
Pipe closures
Pipe closures allow you to close or open a pipe and visualize the changes in the network. If you have shutdown valves in the network, Qatium will perform a water main shutdown. If your network doesn’t have shutdown valves, Qatium will close and open the pipes as described below. To close a pipe, click on the said pipe and click on the toggle button to a closed position. As soon as the pipe is closed a new simulation will run with the pipe closed, updating the results. To open a pipe, repeat the same exercise to switch the toggle button to an opened position.
Please note that a closed pipe will be in a dashed line with a white lock inside an orange circle across it.
Demand spikes
Demand spike allows you to apply a specific demand at selected junctions and visualize the changes in the network. Demand spike can be used for fire-flow analysis, main conditioning, unidirectional flushing, new development scenarios, criticality analysis, permitting etc.
TIP: You can combine Pipe Closure with Demand Spike!
To use Demand spike, click on the demand spike button
on the righthand side of the screen, then select a junction on which to apply the demand. Click on the panel toggle to turn the module ON. Move the slider to the desired demand and release to apply the demand. A new simulation will run with the extra demand applied.
You can apply demand spikes on multiple junctions.
Select another junction and move the slider to the desired value. You can repeat this for as many junctions as needed.
Watermain shutdowns
Closing a pipe allows you to visualise what valves to operate to isolate the selected pipe. You can also visualise the other impacted pipes, isolated by the valves operated to close the selected pipe. The isolated pipes will be in a dashed line with an orange lock icon across them, the valves needing to be operated to close the selected pipe will be haloed in orange, as seen on the image below. You can repeat that process and select as many pipes as required.
TIP: You can expand or reduce the isolated area by operating valves. Qatium will run a new simulation with the new valve statuses.
More to come soon.Operating valves
Operating valves allow you to close and open valves in the network. You will be able to isolate areas and visualise the impacts on the fly – whether in the office or in the field. Operating valves can be used to simulate various what-if scenarios including main conditioning, unidirectional flushing, DMA management, water quality management etc.Starts & shutdowns
To operate a valve, click on a valve and click on the toggle to turn it ON or OFF. You can repeat this on any shutdown valve.
Please note that not all valves can be operated, only shutdown valves can. A shutdown valve is defined as:
- a throttle control valve (TCV) in the model.
- Initial status should be fully open or closed. Valves are also considered fully open if the loss coefficient is below 0.001
- No controls or rules are assigned to the valve
Valve settings
To update the valve setting, select a regulation valve (PRV, PSV or FCV) and enter the desired value in the setting input. The change is immediately reflected on the valve’s details and icon. Any change will be applied for the entire period (from the current time step until the end of the day) and will be applied when navigating forward or backward in time. Any pre-existing controls in the model will prevail over manual changes.Operating pumps
Starts & shutdowns
Any pump in the network can be selected to switch its status between ON and OFF, by clicking on the status toggle. The change is immediately reflected on the pump’s details and icon (switching between green and grey). Toggling a pump status, will change it for the current time step on which the change was applied and all subsequent time steps. The newly set status will remain until a new change is applied.
Your manual changes will prevail over existing controls in the model, whether originating from live data or the base model.
e.g: Your model contains a pump that is turned ON for the whole day, with no controls associated. You turn OFF the pump at 7:00 o’clock. Now you can see the pump being ON from the start of the day to 6:00 but from 7:00 until the remainder of the day you will see it turned OFF.
