Introduction

Diane McKnight
Themes
Ecosystem Framework
Transport in Streams: Hyporheic Exchange
Solute Transport
OTIS Equations
Streeter-Phelps Equation: the DO sag
Reactions Along Biogeochemical Gradient
HDOM (Humic substances)
Quantifying Hyporheic Exchange (1)
Quantifying Hyporheic Exchange (2)
Examples From Mountain Streams
Lake Joyce
Onyx River Flow
Dry Valley Streams: Perennial Mats
Creek
Nutrient Cycling in Green Creek
Observed Production of NO2
Nutrient Cycling in Green Creek
Green Creek (lower flow)
1st Order Rate Constants (1)
1st Order Rate Constants (2)
DOC Sorption in AMD Streams
DOC is about 50% Lower in Upper Snake
Experiment
5 Days For Collection...
Injected for 1 Hour
Samples
Absorbance and DOC
Removal Rate
NWTLTER
Nitrate Deposited With Snow and DOM
C & N Transport
Seasonal changes in HDOM
Chart
Tracer Experiment
Graph
OTIS Simulation
Chart
Simulate Concentrations
Streams: Experimental Ecosystems (1)
Streams: Experimental Ecosystems (2)
River Continuum Concept (1)
Ecosystems
River Continuum Concept (2)
RCC Hypothesis (1)
RCC Hypothesis (2)
RCC Hypothesis (3)
Seasonal Changes in HDOM Source
Revised Hypothesis
River Continuum Concept
Chart (1)
Chart (2)
DOM Photochemistry in North Slope of Alaska
Diffrences in Arctic HDOM
Photolysis Studies
River Continuum
Ecosystems: Fundamental Units of Nature