Stream Solute Dynamics: Non-Conservative Behavior

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Presentation transcript:

Stream Solute Dynamics: Non-Conservative Behavior Lecture 19

Outline for the week Slug vs constant rate additions Estimates of discharge Estimates of lateral inflow Hyporheic dynamics In-stream storage and transport Conservative vs Non-Conservative solutes Spiraling length and uptake Relationships to stream ecology

What we know so far Conservative solute behavior Slug vs continuous additions ΔConcentration as f(time) ΔConcentration as f(distance) Transient vs Hyporheic storage OTIS equation and model Now, non-conservative solute behavior

What is non-conservative behavior? Concentration (% of initial) Chloride Nitrate Phosphate Distance Downstream (m)

The nutrient “spiraling” concept Uptake Length (SW) Regeneration Uptake Regeneration Open-channel Transport Benthic Spiral Length (S) NOTE: SW >> SB Uptake Turnover Length (SB) Flow Open-channel Transport Benthic Transport

Quantifying SW Ln(Corrected Concentration) Chloride Nitrate Phosphate Distance Downstream (m)

How the S correction works

Uptake Metrics Uptake length (m) Uptake velocity (m/s) Uptake rate (μg m-2 s-1)

The “River Continuum Concept”