Protecting & enhancing Arizona’s water supplies for current and future generations.
Pinal Regional Model
Pinal Regional Model
Model History and Timeline
Pinal MODFLOW model development began in the late 1980's. Previous to the late 1980's, no numeric groundwater models within the Pinal AMA had been developed. Thomas Anderson (1968) developed an electric analog model simulating the groundwater depletion of Central Arizona between 1923 and 1964. Since the first ADWR Pinal MODFLOW release in 1990 the model has not been updated. The challenge in developing a model within the Pinal AMA is lack of measured data. The original ADWR MODFLOW model relied on data provided through a report by Hardt and Cattany entitled "Basic Groundwater Data for Western Pinal County"(1964).
In October 2007 the Pinal AMA MODFLOW model began the initial phase of update that included both the steady state (circa 1900) and the transient model (1922-2009). The Pinal model geology update was completed in 2010 and the updated modeling report that includes the simulation of subsidence was completed in 2014.
Model Location
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Model Datasets
| File Name | File Description | Form |
|---|---|---|
| Pinal Modeling Report No. 26 Geodatabase | Steady State to 2009 ADWR Calibrated Spatial Datasets (ESRI GDB) |
 PinalModelGeodatabse_SSTo2009(1).zip |
| Model Files Referenced in ADWR Modeling Report No. 26 | 1922 to 2009 ADWR Calibrated Transient Pinal Model Modflow Datasets |
Pinal Model Datasets-032014.zip |
| Model Files Referenced in ADWR Modeling Report No. 02 | 1985 to 1988 ADWR Calibrated Transient Pinal Model MODFLOW Datasets |
Pinal_1990.zip |
Model Reports and Documents
| File Name | File Description | Linked Files | Files/Forms |
|---|---|---|---|
| Modeling Report No. 20 (2010) | Regional Groundwater Flow Model of the Pinal Active Management Area: Provisional Report - Geology Update. Modeling Report No. 20 (2010) - Access Database | Modeling_Report_20.pdfPinal_Provisional_Geology.zip | |
| Modeling Report No. 26 (2014) |
Regional Groundwater Flow Model of the Pinal Active Management Area, Arizona. Modeling Report No. 26 (2014) |
Final Pinal Model Report All 02-24-2014PinalModelDatasets-032014(1).zipPinalModelGeodatabse_SSTo2009(1).zip | |
| Professional Review | Professional Review of the Pinal Active Management Area's Groundwater Budget. Burgess & Niple (2004) | Prof Review Pinal AMA GW Budget Burgess Niple 2004 | |
| The Pinal model grid | The Pinal model grid encompasses approximately 1,575 square miles. [1.6MB pdf] | Pinal_Area.pdf | |
| Pinal Model Location Map | The Pinal model grid encompasses approximately 1,575 square miles. [1.6MB pdf] Adobe File | Pinal_Area.pdf | |
| Modeling Report No. 26 (2018) | Pinal Groundwater Model Report No. 26 (2018) Data Files | Pinal Groundwater Modeling Report No 26 (2018) Data Files | |
| Modeling Report No. 04 | Pinal Active Management Area Second Management Plan, Simulation of Water Use Scenarios Utilizing The Pinal AMA Regional Groundwater Flow Model. Corkhill and Plato. Modeling Report No. 04 (1992) | Modeling_Report_4.pdf | |
| Modeling Report No. 02 | Pinal Active Management Area Regional Groundwater Flow Model Phase Two: Numerical Model, Calibration Sensitivity, and Recommendations. Corkhill and Hill. Modeling Report No. 02 (1990) | Modeling_Report_2.pdf | |
| Modeling Report No. 01 | Pinal Active Management Area Regional Groundwater Flow Model Phase One: Hydrogeologic Framework, Water Budget, and Phase One Recommendations. Wickham and Corkhill. Modeling Report No. 01 (1989) [9.4MB pdf]pdf | Modeling_Report_01.pdf | |
| Modeling Report No. 05 | Phoenix-Goodyear Airport Groundwater Flow and Contaminant Transport Model. Greg Bushner. Modeling Report No. 05 (September 1992) | Modeling_Report_5.pdf |
Questions?
If you have any questions please contact the ADWR Modeling Unit.