A well is pumping into a reservoir at 300 gpm while the service pumps are pumping from the reservoir at 400 gpm. Which direction is the reservoir water level going?

In this scenario, the reservoir is receiving water from the well at a rate of 300 gallons per minute (gpm) and is losing water to the service pumps at a higher rate of 400 gpm. The net effect is that the reservoir is losing more water than it is gaining.

To determine the direction of the reservoir water level, we can assess the difference between the inflow and outflow rates. Since the outflow (400 gpm) exceeds the inflow (300 gpm) by 100 gpm, it indicates that there is a net loss of water from the reservoir. This loss will cause the water level within the reservoir to decrease.

As a result, the correct conclusion is that the water level of the reservoir is going down due to this imbalance in water flow rates.