Illinois Water Supply Planning




     The difference between the water level in a well before pumping starts (static level) and the water level in a well during pumping, usually measured in feet or meters. Drawdown can be measured in the pumping well itself and in other nearby wells (observation wells). Also, for flowing wells, the reduction of the pressure head as a result of the discharge of water. See also, Interference.

Choose Another Glossary Word

You can also Search the questions/terms. Term References    

WSP FAQ Home - Glossary - Search

Illinois State Water Survey

2204 Griffith Dr
Champaign, IL 61820-7463

Terms of use. Email the Web Administrator with questions or comments.

© 2018 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Water Survey.
Site Map