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Ground-water levels in Illinois through 1961

 
 Volume/Number:  1963  
 Issuing Agency:   
 Description:  Systematic measurements of ground-water levels in Illinois were started in the early 1930s in the Chicago region. Measurements were made in 1961 in 220 observation wells in 42 counties throughout the state. In areas remote from pumping centers, no long-term continuing trends of general rise or decline of the water table are discernible. A large part of central and southern Illinois experienced a severe drought beginning early in 1952 and ending in most areas during the spring of 1955. As a result, ground-water levels declined to record-low stages especially in the southern one-half of Illinois. However, large quantities of ground water taken from storage within the ground-water reservoir were replenished during succeeding years as precipitation increased. In heavily pumped areas, changes in water levels caused by pumping are superimposed on seasonal and secular fluctuations due to natural phenomena.In some instances large developments of ground water have caused pronounced and serious declines of water levels. There are many areas of ground-water development where serious water-level declines have not occurred. 
 Date Created:  9 24 2004 
 Agency ID:  RI-45 
 ISL ID:  000000000928   Original UID: 999999993909 FIRST WORD: Ground