2012 water quality
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What does 2012 look like from aWater Quality Perspective?
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Statewide Comprehensive WaterPlanning
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Population Growth in Georgia
Population expected to double in 25 years
Demand is expected to outpace limited supplies
Regional resources are already stressed
3.45 3.94 4.59
5.466.48
8.19
1950 1960 1970 1980 1990 2000
Census year
T o t a l p o p u
l a t i o
( m i l l i o n
s )
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2008 State Water PlanManagement Objectives
Minimize withdrawals through conservation, reuse, andefficiency
Maximize returns to basins of origin through management of
interbasin transfers, septic systems, and land application for
treatment of wastewater
Meet instream & off-stream demands through policies oninstream flow, water supply reservoirs, and aquifer
management
Protect water quality and meet assimilative capacity needs bymanaging point and nonpoint source discharges
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Impaired Stream SegmentsOrganics
pH
Toxicity
Organics
pH
Toxicity
Fish Consumption
Organics
pH
Toxicity
Fish Consumption
Dissolved Oxygen
Organics
pH
Toxicity
Fish Consumption
Dissolved Oxygen
Biota (sediment)
Organics
pH
Toxicity
Fish Consumption
Dissolved Oxygen
Biota (sediment)
Fecal
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Assimilative Capacity
Develop water quality models
Calibrate models to existing conditions
Use models to conduct resource assessmentand to evaluate current and future wasteloads
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Water Quality Models
Steady State River and Stream Models
Steady State Estuary Models
Hydrodynamic River Models
Watershed Models
Lake and Estuary Models
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GA DOSAG Mode ls
Wastewater Treatment Plant
Flow
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GA DOSAG Mode ls
Wastewater Treatment Plant
Flow
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DOSAG Model Calibration
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Watershed andLake/Estuary Models
EFDC or
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Lake Chlorophyll a Calibration
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Dry yearWet year
Nut r ient Resu lt s – Tot a l N
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Dry year
Nut r ient Resu lt s – Tot a l P
Wet year
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WaterQuality
Models
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2010Monitoring
Strategy
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Tec hnic a l Approac h
Nutrient criteria will be developed for ecoregions
Analyze
– Historic data – New data collection
– Nutrient data from NPDES facilities
– Watershed Assessment data
Perform various statistical analysis alternatives
Examine cause-response relationship
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No. Ecoregion
Percentile
5th 25th 50th 75th 95th Count
45 Piedmont 0.01 0.03 0.06 0.15 0.79 28,649
65 Southeastern Plains 0.01 0.04 0.08 0.15 1.22 16,360
66 Blue Ridge 0.01 0.01 0.02 0.05 0.17 3,256
67 Ridge and Valley 0.01 0.04 0.09 0.19 0.64 8,082
68 Southwestern Appalachians 0.01 0.01 0.01 0.01 0.01 12
75 Southern Coastal Plains 0.02 0.05 0.08 0.13 0.27 10,143
Tot a l P
His to r icNut r ien tData
Analys is
No. Ecoregion
Percentile
5th 25th 50th 75th 95th Count
45 Piedmont 0.24 0.51 0.89 1.58 4.31 6,183
65 Southeastern Plains 0.33 0.61 0.83 1.08 1.86 2,661
66 Blue Ridge 0.08 0.22 0.34 0.57 2.58 1,587
67 Ridge and Valley 0.25 0.50 0.72 0.97 1.88 2,645
68 Southwestern Appalachians - - - - - 0
75 Southern Coastal Plains 0.21 0.51 0.66 0.92 1.51 1,423
Tot a l N
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Nutrient Criteria Development Plan
Lakes and Reservoirs 2012
River and Streams 2013
Estuaries and Coastal Waters 2014
Wetlands 2014
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Quest ions?
Elizabeth A. Booth, Ph.D. P.E.
Georgia [email protected]
404 675-1675