What factors are considered when measuring drawdown in a well?

When measuring drawdown in a well, it is essential to focus on the difference between the static water level and the pumping water level. Static water level refers to the height of the water in the well when no water is being extracted, while the pumping water level is the height of the water during the time of pumping. The drawdown is calculated by subtracting the pumping level from the static level, indicating how much the water level has dropped due to extraction. This measurement is crucial for understanding the well's performance and sustainability because it reflects the impact of pumping on groundwater resources and helps in assessing aquifer recharge rates.

While other factors like the volume of water extracted and the rate of water flow into the well are important for overall well management and efficiency, they do not directly define drawdown, which is specifically the measurement of the change in water level due to pumping.