Drawdown is the drop in level of water in a well when water is being pumped. Drawdown measurements record the difference (in feet or meters) between the static level and the pumping level. Well yield. Well yield is the volume of water per unit of time that is.

What is the drawdown at the pumping well?

Drawdown is a term applied to the maximum lowering of the groundwater table caused by pumping or artesian flow (Figure D60). It is measured as the difference between the initial level of water in a well before pumping, and the static, or stabilized, level of water after a long period of pumping.

What is soil drawdown?

In subsurface hydrogeology, drawdown is the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test.