How do you determine the drawdown if you have the pumping level and the static level?

To determine the drawdown in a water well, you need to subtract the static water level from the pumping level. The static level represents the depth of water in the well when it is not being pumped, while the pumping level is the depth of the water when it is actively being drawn from the well.

Drawdown is defined as the difference in these two levels, reflecting how much the water level has dropped due to the pumping action. A larger drawdown indicates more significant water extraction and can provide insight into the well's performance and the aquifer's characteristics. Therefore, the correct method involves subtracting the static level from the pumping level to calculate this critical measurement.