Synopsis Report
Current Assimilative
Capacity Assessment
G eo rg ia En vir o n me nt al
P r ote ct io n D i vis i o n
Review Draft
March 2010
Review Draft
Synopsis Report Current Assimilative Capacity Assessment
Table of Contents
TABLE OF CONTENTS ........................................................................................................................... 0 LIST OF APPENDICES ............................................................................................................................ 1 LIST OF FIGURES .................................................................................................................................... 2 LIST OF TABLES ...................................................................................................................................... 2 SUMMARY OF RESULTS ....................................................................................................................... 3 MODELS USED FOR ASSIMILATIVE CAPACITY RESOURCE ASSESSMENT ............................. 3 WATER QUALITY STANDARDS ......................................................................................................... 3 DISSOLVED OXYGEN RESULTS......................................................................................................... 4 NUTRIENT RESULTS ............................................................................................................................ 5 CONCLUSIONS....................................................................................................................................... 6 1.0 INTRODUCTION........................................................................................................................... 7 2.0 MODELS USED FOR RESOURCE ASSESSMENT .................................................................. 9 2.1 2.2 2.3 2.4 2.5 2.6 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 4.0 GA DOSAG .................................................................................................................................... 9 GAEST ........................................................................................................................................... 9 LSPC ............................................................................................................................................. 9 EFDC ............................................................................................................................................ 9 MODEL CALIBRATION AND VALIDATION ................................................................................... 10 MODEL CALIBRATION REPORTS ................................................................................................. 10 DISSOLVED OXYGEN RESULTS ............................................................................................ 11 WATER QUALITY STANDARDS.................................................................................................... 11 CHATTAHOOCHEE RIVER WATERSHED....................................................................................... 12 FLINT AND OCHLOCKNEE RIVER WATERSHEDS ......................................................................... 12 COOSA, TALLAPOOSA AND TENNESSEE RIVER WATERSHEDS ................................................... 13 SAVANNAH AND OGEECHEE RIVER WATERSHEDS ..................................................................... 13 OCONEE, OCMULGEE, AND ALTAMAHA RIVER WATERSHEDS ................................................... 14 SUWANNEE, SATILLA, AND ST. MARY’S RIVER WATERSHEDS .................................................. 14 BRUNSWICK HARBOR ESTUARY ................................................................................................. 15 NUTRIENT RESULTS ................................................................................................................ 16 4.1 WATER QUALITY STANDARDS.................................................................................................... 16 4.1.1 Coosa River ...................................................................................................................... 16 4.1.2 Lake Allatoona.................................................................................................................. 16 4.1.3 Lake Jackson .................................................................................................................... 17 4.2 COOSA RIVER .............................................................................................................................. 17 4.3 LAKE RESULTS ............................................................................................................................ 18 4.3.1 Lake Allatoona.................................................................................................................. 18 4.3.2 Lake Jackson .................................................................................................................... 21 4.3.3 Lake Oconee ..................................................................................................................... 24 4.3.4 Lake Sinclair ..................................................................................................................... 26 5.0 REFERENCES .............................................................................................................................. 28
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Georgia State-wide Water Management Plan
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Review Draft
Synopsis Report Current Assimilative Capacity Assessment
List of Appendices
APPENDIX A – MODEL METHODOLOGY AND ASSUMPTIONS USED FOR THE
ASSIMILATIVE CAPACITY RESOURCE ASSESSMENT
APPENDIX B – DISSOLVED OXYGEN RESULTS
APPENDIX C – NUTRIENT RESULTS
Revision History
The following table presents the revision history of the Current Assimilative Capacity Assessment
Report.
Table i-1
Revision History of Current Assimilative Capacity Assessment Report
Revision
Number
Release Date
0
March 2010
Comments
Initial Release of Report.
Note that the results in this document and the associated
appendices are DRAFT and are subject to change.
Acknowledgements
The Georgia Environmental Protection Division acknowledges the tremendous efforts of the Tetra Tech
Team, including Tetra Tech, Wilson Engineering, and Natural Resources Engineering in the development
of the models, analysis of the results, staff support, and in the preparation of this document. Without their
assistance and dedication to this project, this effort could not have been completed.
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Review Draft
Synopsis Report Current Assimilative Capacity Assessment
List of Figures
Figure 1-1 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 3-8 Figure 4-1 Figure 4-2 Figure 4-3 Figure 4-4 Available Assimilative Capacity Models............................................................................ 8 Description of Dissolved Oxygen Results ........................................................................ 11 Results of Dissolved Oxygen Models in the Chattahoochee River Watershed ................ 12 Results of Dissolved Oxygen Models in the Flint and Ochlocknee River Watersheds .... 12 Results of Dissolved Oxygen Models in the Coosa, Tallapoosa, and Tennessee River
Watersheds ........................................................................................................................ 13 Results of Dissolved Oxygen Models in the Savannah and Ogeechee River Watersheds 13 Results of Dissolved Oxygen Models in the Oconee, Ocmulgee and Altamaha River
Watersheds ........................................................................................................................ 14 Results of Dissolved Oxygen Models in the Suwannee, Satilla, and St. Mary’s River
Watersheds ........................................................................................................................ 14 Available Dissolved Oxygen in Brunswick Harbor for Year 2007 .................................. 15 Maximum Value of Total Nitrogen (mg/L) in Lake Allatoona in Photic Zone: year 2007
.......................................................................................................................................... 18 Maximum Value of Total Nitrogen (mg/L) in Lake Jackson in Photic Zone: year 2007 . 21 Maximum Value of Total Nitrogen (mgN/L) in Lake Oconee in Photic Zone: year 2007
.......................................................................................................................................... 24 Maximum Value of Total Nitrogen (mgN/L) in Lake Sinclair in Photic Zone: year 2007
.......................................................................................................................................... 26 List of Tables
Table i-1 Table 4-1 Table 4-2 Table 4-3 Table 4-4 Table 4-5 Table 4-6 Table 4-7 Table 4-8 Table 4-9 Table 4-10 Table 4-11 Table 4-12 Table 4-13 Table 4-14 Table 4-15 Table 4-16 Table 4-17 Table 4-18 Table 4-19 Revision History of Current Assimilative Capacity Assessment Report ............................ 1 Coosa River Growing Season Median Concentration of Total Phosphorus (mg/L) ......... 17 Lake Allatoona Growing Season Average Chlorophyll a (ug/L)...................................... 18 Lake Allatoona Annual Total Phosphorus Loading .......................................................... 19 Lake Allatoona Watershed Annual Tributary Total Phosphorus Loads (lbs) ................... 19 Lake Allatoona Watershed Annual Tributary Total Phosphorus Loads (lbs/acre) ........... 20 Lake Allatoona Watershed Annual Tributary Total Phosphorus Loads (lbs/acre) ........... 20 Lake Jackson Growing Season Average Chlorophyll a (ug/L) ........................................ 21 Lake Jackson Annual Total Phosphorus Loading ............................................................. 22 Lake Jackson Watershed Annual Tributary Total Phosphorus Loads (lbs) ...................... 22 Lake Jackson Watershed Annual Tributary Total Phosphorus Loads (lbs/acre) .............. 22 Lake Jackson Watershed Annual Tributary Total Phosphorus Loads (lbs/acre) .............. 23 Lake Oconee Growing Season Average Chlorophyll a (ug/L) ......................................... 24 Lake Oconee Annual Total Phosphorus Loading ............................................................. 25 Lake Oconee Watershed Annual Tributary Total Phosphorus Loads (lbs) ...................... 25 Lake Oconee Watershed Annual Tributary Total Phosphorus Loads (lbs/acre)............... 25 Lake Sinclair Growing Season Average Chlorophyll a (ug/L)......................................... 26 Lake Sinclair Annual Total Phosphorus Loading ............................................................. 27 Lake Sinclair Watershed Annual Tributary Total Phosphorus Loads (lbs) ...................... 27 Lake Sinclair Watershed Annual Tributary Total Phosphorus Loads (lbs/acre) .............. 27 March 2010
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