The Supplies The Product eutrophication: nutrient-driven stimulation of plant growth; contrast natural and cultural eutrophication; phosphorus is most.

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Presentation transcript:

The Supplies The Product eutrophication: nutrient-driven stimulation of plant growth; contrast natural and cultural eutrophication; phosphorus is most often the limiting nutrient in freshwaters. CE5504. Lab 1 – Coupling Empirical and Mechanistic Models

Manifestations of eutrophication – algae and macrophytes

Manifestations of eutrophication - transparency Dodson 2005

Manifestations of eutrophication – oxygen depletion Temperature (°C) Depth (m) Spring Summer

Manifestations of eutrophication – oxygen depletion

mgO 2  L -1 A M J J A S

BUDGET MODEL for phosphorus W Q∙P v∙A s AsAs V

TROPHIC STATE CORRELATIONS – phosphorus and chlorophyll log total phosphorus (mgP  m -3 ) log chlorophyll (mg  m -3 ) log Chl =  log TP R 2 = 0.59 (b)

TROPHIC STATE CORRELATIONS – chlorophyll and Secchi disk Chlorophyll (mg  m -3 ) Secchi Disk Transparency (m) log SD =  log Chl R 2 = 0.76 (a)

TROPHIC STATE CORRELATIONS – phosphorus and AHOD Areal Hypolimnetic Oxygen Demand (gO 2  m -2  d -1 ) Total Phosphorus (mgP  m -3 ) AHOD =  TP R 2 = 0.79 (c)

ASSIGNMENT: Lab 1. Coupling Empirical and Mechanistic Models