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.

Dec 27, 2025 · Understand how pumping impacts your well’s water level, determine drawdown accurately, and avoid costly pump failure or running your well dry.

In these notes the interpretation of pumping well drawdowns is built up gradually in complexity. The notes begin with the characterization of the components of the drawdown in a pumping …

A true well flow test or well draw down test will discover the ability of the well to deliver water, without confusion caused by the characteristics of the building's own well pump, pump control, …

Jun 3, 2019 · During a pumping test, water is pumped out of a well/bore over a period of time, at a controlled rate. As pumping occurs, groundwater levels decline (drawdown). When the pump …

When wells are pumped, the water level in the casing is lowered (drawn down) relative to the water level in the aquifer. This drawdown causes stored water in the aquifer to flow towards …

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 …

Jun 18, 2025 · Pump drawdown testing is a powerful tool in groundwater management. When done correctly, it provides actionable data that supports sustainable pumping, efficient well …

A step-drawdown test is a single-well test that is frequently conducted after well development to determine well efficiency and correctly size the production pump.

Jul 14, 2025 · Accurate drawdown calculations have critical practical applications in well field design, regulatory permitting, environmental protection, and ensuring the long-term …