A reservoir has an inflow of 15 m³/s and an outflow of 10 m³/s. If its surface area is 2 km² and evaporation is 0.5 cm/day, what is the net change in storage volume over 24 hours, excluding precipitation?

The net change in storage volume of a reservoir over a specific period is determined by the water balance equation, which accounts for all water entering the reservoir and subtracting all water leaving it during that time. For this calculation, the inputs include inflow, and the outputs include outflow and evaporation, with precipitation being explicitly excluded. A positive net change indicates an increase in the reservoir's stored water, while a negative change indicates a decrease. To calculate the net change, all units must first be made consistent. The given time period is 24 hours. There are 86,400 seconds in 24 hours (24 hours multiplied by 60 minutes per hour, then multiplied by 60 seconds per minute). The reservoir's surface area is 2 square kilometers (km²), which is equivalent to 2,000,000 square meters....