Estuarine Eutrophication Models

Final Report Project E6 National River Health Program
Water Services Association of Australia Melbourne Australia
John Parslow, John Hunter, Adam Davidson.
CSIRO Marine Research. Hobart, Tasmania

Contents

3.1 Phytoplankton Growth And Nutrient Uptake

3.2 Phytoplankton Loss Rates

3.3 Zooplankton Growth and Losses

3.4 Detritus and Nutrient Recycling

3.5 Sediment Biogeochemistry

3.6. Simple vs Complex Process Models

3.6.1. Multiple Nutrients

3.6.2. Trophic Complexity

3.6.3. Organic Matter

3.6.4. Benthic Communities

3.6.5. Complexity and Data Requirements

4.1 Model Definition

4.2 Steady-state Analysis

4.2.1 Total N Balance

4.2.2 Composition of TN

4.2.3. Response to Nitrogen Load

4.2.4 Phytoplankton Mortality and Multiple Stable States

4.2.5. Denitrification as an Internal Sink

4.2.6. Organic Nitrogen Loads

4.3. Conclusions

5.1. Introduction

5.2. Hansen-Rattray Estuary Classification

5.3. Summary of Possible Models

5.3.1. Nomenclature

5.3.2. A Pseudo-Potential Method

5.3.3 One-Dimensional Single-Layer Model

5.3.4. One-Dimensional Two-Layer (Pritchard) Model

5.3.5. One-Dimensional Two-Layer Hybrid Model

5.3.6. One-Dimensional n-Layer Hybrid Model

5.4. Implementation of One-Dimensional n-Layer Hybrid Model

5.4.1. Weighting of Fluxes and Equations

5.4.2. The Diffusive Fraction

5.4.3. Upstream Differencing

5.4.4. Evaluation of Time-Dependent Flow Fields

6.1. The spatially-resolved model

6.2. Derwent River Estuary

6.2.1. General Description

6.2.2. Data Sets

6.2.3. Estuary Geometry and Physical Exchanges

6.2.4. Nutrient Loads and Boundary Conditions

6.2.5. Model 0 Data Comparisons

6.2.6. Model Behaviour And Experiments

6.2.7. Implications For Point Source Locations

6.3. Brunswick River Estuary

6.3.1. General Description

6.3.2. Data Sets

6.3.3 Estuary Geometry and Physical Exchanges

6.3.4. Nutrient Loads and Boundary Conditions

6.3.5. Model-Data Comparisons

6.3.6. Model behaviour and experiments

6.3.7. Implications for Point Source Location

6.4. Hardy Inlet

6.4.1. General Description

6.4.2. Data Sets

6.4.3. Estuary Geometry and Physical Exchanges

6.4.4. Nutrient Loads and Boundary Conditions

6.4.5. Model-Data Comparisons

6.4.6. Model Behaviour

6.5. Conclusions from Test Cases

7.1. Introduction

7.2. Predicting Bloom Composition

7.3. Feedback of algal composition on biomass models

7.3.1.Loss rates

7.3.2.Growth Rates

7.3.3.N-fixation

7.3.4.Implementation

8.1. Conclusions from the one-box model

8.2. Conclusions from the Spatially Resolved Model

9.1. Data Requirements for Modelling and Predicting Eutrophication and Algal Blooms in estuaries

9.2. Priorities for Further Model Development

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Table of Contents: Estuarine Eutrophication Models


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