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

DISSOLVED OXYGEN and system metabolism in flowing waters Including a bonus natural disaster (GLOF). B.L. Reid. Centro de Investigación en Ecosístemas de la Patagonia (CIEP). Flathead Lake Biological Station The University of Montana. DO Isopleths: Surficial Groundwater. 0. 2. 4. 6.

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

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  1. DISSOLVED OXYGEN and system metabolism in flowing waters Including a bonus natural disaster (GLOF) B.L. Reid Centro de Investigación en Ecosístemas de la Patagonia (CIEP) Flathead Lake Biological Station The University of Montana

  2. DO Isopleths: Surficial Groundwater

  3. 0 2 4 6 8 10 0 3 6 9 12 0 2 2 4 4 6 6 8 0 Jun 04 2 Aug 04 Nov 04 4 Jan 05 6 May 05 8 DO Isopleths: Surficial Groundwater

  4. 12 9 Mean DO (mg/l) 6 3 0 30 20 10 Flowpath Residence Time - Tau (d) DO Isopleths: Surficial Groundwater

  5. 12 DO (mg/l) 8 4 0 Jun-04 Sep-04 Dec-04 Mar-05 Jun-05 Sep-05 Dec-05 Mar-06

  6. Recharge - river Horizontal Flow Zone 8 Discharge Zone 6 Resp (μg O2/lsed/hr) 4 2 0

  7. “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 300 300 River 250 wells 250 y = 18.119x - 13.929 200 2 R = 0.8848 R 2 = 0.704 DSi (μmol/l) avg NOx (ug/l) 150 200 100 50 150 0 0 2 4 6 8 10 12 avg DO (mg/l) 100 0 100 200 300 400 DO (μmol/l)

  8. BGC along aquifer flowpaths: threshold response…. 500 River Wells 400 300 2 R = 0.9183 Specific Conducrance (uS/cm-2s-1) 200 100 0 9 pH 8 2 R = 0.703 7 0 2 4 6 8 10 12 mean DO (mg/l)

  9. River Metabolism: Rio Coyhaique, Chile

  10. Daytime: DO = P – R + Raer Nightime: DO = – R + Raer 9 Sep 2008

  11. Assumptions on Ecosystem Metabolism? 25 Nov 2008

  12. Is this Robust Pattern? Saturation (270m)

  13. Environmental Stress?

  14. Metabolism in the Landscape: Rivers vs. Lakes? From A. Stehr, EULA U de Concepcion

  15. 3370

  16. Outlet LG Carrera Balsa Baker (km 50) Tortel (km 150)

  17. Outlet: Lago Traiguen Lago Sauce Grande Outlet: Lago Yulton

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