Standard Article


Ground Water Hydrology

  1. John E. Moore

Published Online: 15 APR 2005

DOI: 10.1002/047147844X.gw801

Water Encyclopedia

Water Encyclopedia

How to Cite

Moore, J. E. 2005. Overdraft. Water Encyclopedia. 5:340–343.

Author Information

  1. USGS (Retired), Denver, Colorado

Publication History

  1. Published Online: 15 APR 2005


Groundwater mining (overdraft) occurs when there is a deliberate or inadvertent extraction of groundwater at a rate so in excess of replenishment that groundwater levels decline persistently and threaten exhaustion of the supply or at least a decline of pumping levels to uneconomic depths.


  • groundwater;
  • mining;
  • water level decline;
  • land subsidence;
  • well yield;
  • Denver;
  • Las Vegas;
  • Tucson;
  • Chicago;
  • overdraft