Contents

Introduction

	Background and history
	A recent decline in trout abundance

Aims and Objectives

Methods

	Sites used
	Site monitoring
	River flow data
	Sediment deposition rates
	Statistical analysis
	Sediment deposition modeling
	Incubation simulations

Results

	Sites used
	Site Monitoring
	River flow data
	Sediment Deposition Rates
	Sediment accumulation modelling

Discussion

	Limitations of the model
	Data Issues
	Assumptions Made
	Factors Included
	Model Predictions
	Relative accumulation rates
	Total sediment accumulation
	Spawning reach shift
	The Styx River in decline?

Management options

	Inappropriate discharge prevention
	Riparian management
	Instream habitat improvement
	River dredging

Conclusions

Recommendations

References

Appendix A - Site descriptions Appendix B - Equations used for individual channel sections