Groundwater Withdrawals for Public Supply Use in the Central Florida Coordination Area (CFCA) and Vicinity, 1945-2010. Professiona Paper SJ2014-PPI.

摘要

The data presented in this paper are part of a larger study carried out by the U.S. Geological Survey titled Simulation of the effects of rainfall and groundwater use on historical lake water levels, groundwater levels, and spring flows in central Florida. The Central Florida Coordination Area (CFCA), which is part of the planning effort known as the Central Florida Water Initiative (CFWI), consists of all or part of Lake, Polk, Orange, Osceola, and Seminole counties. The objective of this effort was to develop a database to build a decision support model that encompasses the CFCA and vicinity. The data presented in this paper are from a variety of sources and were used to develop historical estimates and reported quantities of public supply utility groundwater withdrawals during the period 1945 to 2010. These estimated or reported quantities are for public supply water utilities that withdraw or deliver to service more than 100,000 gallons per day. This information, in combination with agricultural estimates found in McLeod and Munch (2012) can be used to develop data needed to support groundwater modeling efforts in the future. To meet the ever-increasing demand for potable water, there has been steady growth in the number of private and public utilities providing water for public supply. Since 1945, the number of utilities with recorded information has grown from 16 to well over 180 operating more than 183 water treatment plants. Up until the late 1970s, moderate growth in groundwater withdrawals occurred in all three water management districts in the CFCA. Water withdrawals increased in association with increasing population from 1980 through 2006. Since 2006, withdrawals have decreased to levels observed in the early 2000s. The maximum groundwater withdrawals occurred in 2006 with a total of 471 million gallons per day (mgd) delivered within the three water management districts. The year 2007 was the second highest at approximately 460 mgd, and the year 2000 was the third highest at 445 mgd. Within the CFCA and in the vicinity, groundwater withdrawals have increased from 8.1 mgd in 1945 to approximately 408 mgd in 2010.