2012 water quality

8/8/2019 2012 Water Quality

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What does 2012 look like from aWater Quality Perspective?



1

Statewide Comprehensive WaterPlanning



2

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 )



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



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



Assimilative Capacity

Develop water quality models

Calibrate models to existing conditions

Use models to conduct resource assessmentand to evaluate current and future wasteloads



Water Quality Models

Steady State River and Stream Models

Steady State Estuary Models

Hydrodynamic River Models

Watershed Models

Lake and Estuary Models



GA DOSAG Mode ls

Wastewater Treatment Plant

Flow



DOSAG Model Calibration



Watershed andLake/Estuary Models

EFDC or



11

Lake Chlorophyll a Calibration



12

Dry yearWet year

Nut r ient Resu lt s – Tot a l N



13

Dry year

Nut r ient Resu lt s – Tot a l P

Wet year



14

WaterQuality

Models



15

2010Monitoring

Strategy



16



17



18



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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



20

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



22

Quest ions?

Elizabeth A. Booth, Ph.D. P.E.

Georgia [email protected]

404 675-1675

2012 water quality

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