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[email protected] Water Quality and Hydrology of the Bighead River Grey County Water Resources Assessment Unit Technical Support Southwestern Region Field Work - 1980 Report Preparation - 1982 TABLE OF CONTENTS Page 1.0 SUMMARY, DISCUSSION AND CONCLUSIONS 1 2.0 INTRODUCTION 5 3.0 METHODS 7 3.1 Hydrology 7 3.2 Water Temperatures 8 3.3 Chemical and Bacterial Data 8 3.4 Storm Event 8 3.5 Bottom Fauna 8 3.6 Aquatic Vegetation 9 4.0 DISCUSSION OF RESULTS 9 4.1 Hydrology 9 4.2 Water Temperatures 12 4.3 Suspended Solids 14 4.4 Phosphorus 14 4.5 Nitrogen 16 4.6 Other Chemical Parameters 16 4.7 Storm Conditions 18 4.8 Bacteria 18 4.9 Bottom Fauna 20 5.0 AQUATIC VEGETATION 20 6.0 GROUNDWATER 21 i Page APPENDIX I 23 Average Mean Monthly Flow Bighead River Near Meaford 24 Bighead River Flow Data - May-October 1980 Summary of 30 selected streamflow sites 25 Bighead River Flow Data - May-October 1980 Summary of nine main sites and their percent contribution to total flow in the Bighead River 28 APPENDIX II 29 Macroinvertebrates collected at 41 sample sites on the Bighead River and tributaries 30 APPENDIX III 52 Water quality data May-November 1980 53 Water quality data collected during a heavy rainfall event July 15, 1980 58 ii LIST OF FIGURES Page Figure 1.