Dissolved Oxygen Criteria Indicators

Dave Jasinski

Top Level – Mainstem and Tidal Trib Attainment

Trib Level – Potomac Attainment

Mainstem and Tidal Trib Attainment through time – by assessment period

Mainstem and Tidal Trib OW Attainment through time – by assessment period

Mainstem and Tidal Trib OW Attainment through time – by month

Potomac Attainment through time – by assessment period

Potomac DW Attainment through time – by assessment period

Potomac DW Attainment through time – by month

2003

Open Water Volume

Deep Channel Volume

Deep Water Volume

Volume of Chesapeake Bay And Tidal Tributaries meeting proposedwater quality standards under 2001-2003 and restored conditions

-Data are expressed as a percentage of the total water volume of the Mainstem Bay and Tidal Tribs. Total Bay volume in this assessment – 73 km3

or 19.3 trillion gallons

-This is the 2001-2003 June-September attainment assessment

Open Water

Deep Water

Deep Channel

2001

-03

Map

s

Segment meeting proposed standards

Segment not meeting proposed standards

20

40

60

80

100

3.9

7.7

11.6

15.4

19.3

0 0

Per

cen

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f to

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Ga

llo

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ng

pro

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d w

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ua

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sta

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ard

s(x

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)

2001-2003 Restored 2010 Goal

20

40

60

80

100

3.9

7.7

11.6

15.4

19.3

0 0

Per

ce

nt

of

tota

l v

olu

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me

eti

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pro

po

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ate

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ual

ity

sta

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ard

s

Gallo

ns m

eeting

pro

po

sed w

ater qu

ality stand

ards (x 1 trillio

n)

Open Water Volume

Deep Channel Volume

Deep Water Volume

- Data are expressed as a percentage of the total water volume of the Mainstem Bay and Tidal Tribs. This volume varies by assessment period. For purposes of this graph, percentages were based on a mean volume of 73.16 km3 or 19.3 trillion gallons

-Year on x axis is the end year of the 3 year assessment period (ie 1992 is the 1990-92 assessment)

-2010 is the projected condition of 100% of the volume meeting the proposed standards

Volume of Chesapeake Bay And Tidal Tributaries meeting proposedwater quality standards

Open Water

Deep Water

Deep Channel

Segment meeting proposed standards

Segment not meeting proposed standards

Segment meeting proposed standards

Segment not meeting proposed standards

Per

cen

t o

f O

W v

olu

me

mee

tin

g p

rop

ose

d w

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qu

alit

y st

and

ard

s

Open Water Volume

Goal- Data are expressed as a percentage of the total Open Water volume of the Mainstem Bay and Tidal Tribs. This volume is approximately 50 km3 or 13 trillion gallons and is variable.

- Year on x axis is the end year of the 3 year assessment period (ie 1992 is the 1990-92 assessment)

Open Water volume meeting proposed water quality standards

Per

cen

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f D

esig

nat

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se V

olu

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Mee

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g W

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d Percent of Mainstem and Tributary Open Water Designated Use Meeting the OW water quality standard (5.0 mg/l) by month

Jun

eJu

lyA

ug

ust

Sep

tem

ber

1985 1986 1987 1988 1989 1990 1991 19931992 1994 1995 1996 1997 19991998 2000 2001 2002 2003

-Data displayed in the graph is the percent of the OW DU for each month that meets the Summer OW water quality standard of 5.0 mg/l. The OW volume is variable from cruise to cruise but on average is 47 km3 or 12,425,194,391,560 gallons

-Maps show the area failing and passing for each month

20

40

60

80

100

.37

.75

1.1

1.5

1.8

0 0

Per

ce

nt

of

tota

l v

olu

me

me

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ng

pro

po

se

d w

ate

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ual

ity

sta

nd

ard

s

Gallo

ns m

eeting

pro

po

sed w

ater qu

ality stand

ards (x 1 trillio

n)

Open Water Volume

Deep Channel Volume

Deep Water Volume

- Data are expressed as a percentage of the total water volume of the Potomac River. This volume varies by assessment period. For purposes of this graph, percentages were based on a mean volume of 7.12 km3 or 1.8 trillion gallons

-Year on x axis is the end year of the 3 year assessment period (ie 1992 is the 1990-92 assessment)

-2010 is the projected condition of 100% of the volume meeting the proposed standards

Volume of Potomac River meeting proposed water quality standards

Open Water

Deep Water

Deep Channel

Segment meeting proposed standards

Segment not meeting proposed standards

2003

Open Water Volume

Deep Channel Volume

Deep Water Volume

Volume of Potomac meeting proposed water quality standards under 2001-2003 and restored conditions

-Data are expressed as a percentage of the total water volume of the Potomac River. Total River volume in this assessment – 7.1 km3 or 1.9 trillion gallons

-This is the 2001-2003 June-September attainment assessment

Open Water

Deep Water

Deep Channel2001

-03

Map

s

Segment meeting proposed standards

Segment not meeting proposed standards

20

40

60

80

100

0.4

0.7

1.1

1.5

1.9

0 0

Per

cen

t o

f to

tal v

olu

me

mee

tin

g p

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ose

d w

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qu

alit

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and

ard

s

Ga

llo

ns

me

eti

ng

pro

po

se

d w

ate

r q

ua

lity

sta

nd

ard

s(x

1 t

rill

ion

)

2001-2003 Restored 2010 Goal

1985 1986 1987 1988 1989 1990 1991 19931992 1994 1995 1996 1997 19991998 2000 2001 2002 2003

Jun

eJu

lyA

ug

ust

Sep

tem

ber

Per

cen

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f D

esig

nat

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se V

olu

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Mee

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g W

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Qu

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d Percent of Potomac Deep Water Designated Use Meeting the DW water quality standard (3.0 mg/l) by month

-Data displayed in the graph is the percent of the DW DU for each month that meets the Summer DW water quality standard of 3.0 mg/l. The Potomac DW volume is variable from cruise to cruise but on average is 1.3 km3 or 340,215,366,570 gallons

-Maps show the area failing and passing for each month

20

40

60

80

100

0.63

1.27

1.88

2.51

3.14

0 0

Per

ce

nt

of

DW

vo

lum

e m

ee

tin

g p

rop

os

ed

wa

ter

qu

alit

y s

tan

da

rds

Gallo

ns m

eeting

pro

po

sed w

ater qu

ality stand

ards (x 100 b

illion

)

- Data are expressed as a percentage of the total Deep Water volume of the Potomac. The Mean volume is approximately 1.25 km3 or 330billion gallons and is variable.

-Year on x axis is the end year of the 3 year assessment period (ie 1992 is the 1990-92 assessment)

-2010 is the projected condition of 100% of the volume meeting the proposed standards

Volume of Potomac River Deep Water Designate Use meeting proposed water quality standards

Segment meeting proposed standards

Segment not meeting proposed standards

Deep Water Volume