---
title: "Explanation: Field test: Pumping test (determining well capacity)"
slug: feldtest-pumpversuch
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# Explanation: Field test: Pumping test (determining well capacity)

A **pumping test to determine the capacity of a well** is a field test used to assess the volume of water a well can deliver under defined conditions. It serves to assess the well’s yield and the behaviour of the aquifer under load.

Typically, the following details are documented during a pumping test:

- the initial condition of the well, e.g. state of development, static water level and location
- the pumping rate or several successive pumping stages
- the duration of the individual pumping and recovery phases
- the measured water levels during pumping and during the recovery phase
- observations regarding turbidity, sand carry or other anomalies
- boundary conditions such as the pump used, measurement intervals and weather conditions

The pumping test provides a reliable basis for assessing the well’s performance and for deciding whether the well is suitable for its intended use.