Contents

8.1 Introduction 171

8.2 The Stormwater Detention System 172

8.3 Experimental Study 173

8.3.1 Rotating Circular Flume 173

8.3.2 Deposition Tests 174

8.4 Mathematical Model 176

8.5 Application of the Model to the Laboratory Data 178

8.5.1 Input Parameters 178

8.5.1.1 Settling Velocity of theFlocs, wk 178

8.5.1.2 Turbulent Diffusion Coefficient, D 178

8.5.1.5 Collision Efficiency Parameter, i 179

8.5.1.6 Collision Frequency Functions Kb, Ksh, KI, Kds 179

8.5.1.7 Model for the Growth-Limiting Effect of Turbulence ... 179

8.6 Comparision of Model Predictions with the Measured Data 180

8.7 Summary and Conclusions 185

Acknowledgments 186

Nomenclature 186

References 187

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