Analytical solutions for groundwater flow programs
Groundwater flow simulation models
Groundwater flow models are used to support the District’s core missions of preserving and protecting water supply and natural systems through regional water supply planning, minimum flows and levels (MFLs) and for regulatory evaluation.
Groundwater Flow Model Locations
East Central Florida Transient Expanded Model Version 2.0
- Developed by the St. Johns River, Southwest and South Florida water management districts
- Covers approximately 23,800-square-miles
- Encompasses an area of central Florida, including the entire Central Florida Water Initiative (CFWI) area extending from central Volusia County (to the north) to the Charlotte-Desoto County line (to the south)
- Fully three-dimensional and transient
- Calibrated to 2004 to 2012 hydrologic conditions
- Validated using 2013 to 2014 conditions
- Grid cell size of 1,250 feet
- Utilizes MODFLOW-NWT
- 11 vertically discretized layers
North Florida Southeast Georgia Model Version 1.1
- Developed by the St. Johns River, Suwannee River and Southwest Florida water management districts
- Covers approximately 60,000 square miles
- Encompasses a large area of the Floridan aquifer system in north Florida, Georgia, and South Carolina
- Fully three-dimensional and steady state
- Calibrated to 2001 and 2009 hydrologic conditions
- Validated using 2010 conditions
- Grid cell size of 2,500 feet
- Utilizes MODFLOW-NWT
- 7 vertically discretized layers
Keystone Heights Transient Model Version 2.0
- Developed for hydrologic simulation of a chain of lakes, primarily Lakes Brooklyn and Geneva, in the Upper Etonia Creek Basin for Minimum Flows and Levels (MFLs) application
- Fully three-dimensional and transient
- Calibrated to 1995-2014 hydrologic conditions
- Long-term simulation developed extending from 1957 to 2018
- Grid cell size of 250 feet
- Utilizes MODFLOW-NWT
- 9 vertically discretized layers
Central Springs Model Version 1.0 (under development)
- Developed by the St. Johns River and Southwest Florida water management districts to support water supply planning in the Central Springs East Coast (CSEC) region
- Model development is ongoing and peer review is anticipated to be complete in 2023
- Fully three-dimensional and transient
- Calibration period is from 2005 to 2018
- Grid cell size of 2,500 feet
- Utilizes MODFLOW-NWT
- 7 vertically discretized layers
Hydrogeologic Information System
The Hydrogeologic Information System provides data related to groundwater resources, including borehole geophysical well logs, lithologic well logs, hydrogeologic surfaces, borehole video logs and potentiometric surface maps.