What is the term for the distance between the static water level and the pumping water level?

The term that describes the distance between the static water level and the pumping water level is drawdown. Drawdown is a crucial concept in water distribution and groundwater management because it indicates how much the water level has been lowered in a well due to pumping. This measurement helps in assessing the impact of pumping on the aquifer and is used to determine the sustainable yield of a well. A large drawdown might signal that the pumping is excessive compared to the recharge rate, potentially leading to long-term resource depletion. Understanding drawdown helps in designing effective pumping strategies and evaluating the effects of extraction on the surrounding groundwater system.