A disturbance in a water distribution system can be defined as any event that causes a change in the normal flow or pressure conditions within the system. These disturbances can be caused by a variety of situations, such as changes in pump operations, valve movements, boundary pressures, demand conditions, and transmission conditions.
Pump startup or shutdown is one of the most common disturbances in water distribution systems. When a pump is started, it can cause an increase in flow and pressure within the system, which can lead to variations in flow and pressure downstream. On the other hand, when a pump is shut down, it can lead to a decrease in flow and pressure, which can also cause variations in flow and pressure downstream. These variations in flow and pressure can have a significant impact on the overall performance and reliability of the system.
Valve opening or closing can also cause disturbances in water distribution systems. When a valve is opened, it increases the flow area within the system, which can lead to an increase in flow and pressure. On the other hand, when a valve is closed, it decreases the flow area within the system, which can lead to a decrease in flow and pressure. These variations in flow and pressure can also have a significant impact on the overall performance and reliability of the system.
Changes in boundary pressures, such as changes in the level or pressure of reservoirs, tanks, etc. can also cause disturbances in water distribution systems. These changes in boundary pressures can lead to variations in pressure and water quality within the system, which can impact the overall performance and reliability of the system.
Rapid changes in demand conditions, such as hydrant flushing, can also cause disturbances in water distribution systems. Sudden changes in water usage can lead to variations in flow and pressure within the system, which can impact the overall performance and reliability of the system.
Changes in transmission conditions, such as pipe breaks or leaks, can also cause disturbances in water distribution systems. These changes in transmission conditions can lead to variations in flow and pressure, as well as water quality issues within the system.
It is important to note that water distribution systems are complex systems and disturbances in one area can have knock-on effects in other parts of the system. Therefore, it is important to monitor and control the system to ensure stability and reliability.
For the EPS option, doing multi-fireflow is important as it will look for the lowest pressure and report that, instead of just reporting the pressure at a specific hydrant. This allows for a more comprehensive understanding of the system and can help identify potential issues before they become critical.
