DISSOLVED OXYGEN and system metabolism in flowing watersIncluding a bonus natural disaster (GLOF)

B.L. Reid

Centro de Investigación en Ecosístemas de la

Patagonia (CIEP)

Flathead Lake Biological StationThe University of Montana

DO Isopleths:

Surficial Groundwater

DO Isopleths:

Surficial Groundwater

Jun 04 Aug 04 Nov 04 Jan 05 May 05

0

2

4

6

1293 6

0

2

4

6

8

0

2

4

6

8

10

0

2

4

6

8

DO Isopleths:

Surficial Groundwater

0

3

6

9

12

30 20 10

Flowpath Residence Time - Tau (d)

Mea

n D

O (

mg/

l)

0

4

8

12

Jun-04 Sep-04 Dec-04 Mar-05 Jun-05 Sep-05 Dec-05 Mar-06

DO

(m

g/l)

M3

M2

M1

17

M3

M2

M1

17

M3

M2

M1

17

M3

M2

M1

17

0

2

4

6

8

Res

p (

μg

O2/

lsed

/hr)

Recharge - river

Horizontal Flow Zone

Discharge Zone

“A skillful limnologist can probably learn more about the nature of a lake from a series of oxygen determinations than from any other kind of chemical data”

– G. Evelyn Hutchinson

y = 18.119x - 13.929

R2 = 0.8848

0

50

100

150

200

250

300

0 2 4 6 8 10 12

avg DO (mg/l)

avg

NO

x (u

g/l)

River

wells

R2 = 0.704

0 100 200 300 400

DO (μmol/l)

100

150

200

250

300

DS

i (μm

ol/l)

R2 = 0.9183

0

100

200

300

400

500

(uS/

cm-2 s

-1)

River

Wells

R2 = 0.703

7

8

9

0 2 4 6 8 10 12

mean DO (mg/l)

pH

Spec

ific

Con

ducr

ance

BGC along aquifer flowpaths: threshold response….

River Metabolism: Rio Coyhaique, Chile

10.4

10.8

11.2

11.6

12

12.4

12.8

0 2 4 6 8 10

Temp (deg C)

DO

(mg/

l)

Day 1; >1600

0800 to 1600

Day 2; >1600

10

11

12

13

18:50 21:50 0:50 3:50 6:50 9:49 12:49 15:49 18:49 21:49

DO

(m

g/l)

0

1

2

3

4

5

6

7

8

9DO

Temp

Daytime:

DO = P – R + Raer

Nightime:

DO = – R + Raer

9 Sep 2008

8.8

9.2

9.6

10

10.4

10.8

9 11 13 15

Temp (deg C)

DO

(mg/

l)Day 1; >1600

0800 to 1600

Day 2; >1600

25 Nov 2008

Assumptions on Ecosystem Metabolism?

7

8

9

10

11

12

13

14

0 5 10 15 20 25Temp (deg C)

DO

(m

g/l)

16-Aug 19-Aug 4-Sep 9-Sep 27-Oct

10-Nov 18-Nov 25-Nov 10-Dec

Saturation (270m)

Is this Robust Pattern?

8

9

10

11

12

13

21:36 0:35 3:35 6:35 9:35 12:35 15:35 18:35 21:35

DO

(m

g/l)

16

17

18

19

20

21

Tem

p (d

eg C

)

DO

Temp

8

9

10

11

12

13

15 16 17 18 19 20 21

Temp (deg C)

DO

(mg/

l)

Day 1; >1600

0700 to 1900

Day 2; >1600

Environmental Stress?

From A. Stehr, EULA

U de Concepcion

Metabolism in the Landscape: Rivers vs. Lakes?

0

500

1000

1500

2000

2500

Oct

-04

Jan-

05

Apr

-05

Jul-

05

Oct

-05

Jan-

06

Apr

-06

Jul-

06

Oct

-06

Jan-

07

Apr

-07

Jul-

07

Oct

-07

Jan-

08

Apr

-08

Q (

m3 s

-1)

bajo L. Bertrand en A. Chacabuco bajo R. Colonia 3370

0

5

10

15

May

-06

Aug

-06

Nov

-06

Feb

-07

May

-07

Aug

-07

Nov

-07

Feb

-08

May

-08

Tem

p (

ºC)

bajo L. Bertrand en A. Chacabuco bajo R. Colonia

9.25

9.75

10.25

0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00

DO

(m

g/l)

12.5

13

13.5

14

14.5DO

Temp

9

10

11

12.5 13 13.5 14 14.5

Temp (deg C)

DO

(m

g/l)

Day 1<0600

0600 to 2000

Day 2; >2000

10.75

11.25

11.75

12.25

12.75

19:12 22:12 1:12 4:12 7:12 10:12 13:12 16:12 19:12

DO

(m

g/l)

10.5

11

11.5

12

12.5

13

13.5DO

Temp

10.75

11.75

12.75

10.5 11 11.5 12 12.5 13 13.5

Temp (deg C)

DO

(m

g/l)

Day 1<0600

0600 to 2000

0

20

40

60

80

100

1:12:00 PM 1:26:24 PM 1:40:48 PM 1:55:12 PM

DO

(m

g/l)

10

20

30

40

50DO

Temp

Outlet LG Carrera Balsa Baker (km 50)

Tortel (km 150)

Lago Sauce Grande

9.2

9.6

10

12 12.5 13 13.5 14

Temp (deg C)

DO

(mg/

l)

0800 to 1900

1900-0800

Day2>0800

9.2

9.6

10

15.4 15.6 15.8 16 16.2

Temp (deg C)

DO

(mg/

l)Day 1; >1600

0800 to 1600

Day 2; >1600

Outlet: Lago Yulton

Outlet: Lago Traiguen

6.00

8.00

10.00

12.00

14.00

10 15 20 25

Temperature (deg C)D

O (

mg

/l)

Saturation

Day 1 <0800

Day 1 0800 to 1800

Day 1 >1800