EXCELLENCE IN ENVIRONMENTAL CONSULTING XCG File #1-1074-03-01 SERVICES February 23, 2010 FINAL REPORT TIER 1 WATER BUDGET AND WATER QUANTITY STRESS ASSESSMENT Prepared for: CATARAQUI REGION CONSERVATION AUTHORITY P.O. Box 160 1641 Perth Road Glenburnie, Ontario, K0H 1S0 Prepared by: XCG CONSULTANTS LTD. XCG Consultants Ltd. 6 Cataraqui Street 6 Cataraqui Street Woolen Mill, West Wing Woolen Mill, West Wing Suite 105 Kingston, ON K7K 1Z7 Suite 105 Tel: (613) 542-5888 Kingston, Ontario K7K 1Z7 Fax: (613) 542-0844 [email protected] FR110740301_100223.docx Tier 1 Water Budget and Stress Assessment TABLE OF CONTENTS TABLE OF CONTENTS 1. INTRODUCTION ....................................................................................................................1 1.1 Background ..............................................................................................................1 1.2 Study Area ...............................................................................................................1 1.3 Study Approach .......................................................................................................1 1.4 Report Organization .................................................................................................2 1.5 Qualification ............................................................................................................2 2. OVERVIEW OF CONCEPTUAL UNDERSTANDING REPORT ..................................................4 2.1 Cataraqui Source Protection Area ............................................................................4 2.2 Physical Land Characteristics ..................................................................................4 2.2.1 Physiography ......................................................................................................... 4 2.2.2 Soils of the CSPA .................................................................................................. 5 2.2.3 Land Cover/Use ..................................................................................................... 6 2.3 Conceptual Water Budget ........................................................................................6 2.3.1 Objectives and Methodology ................................................................................. 6 2.3.2 Results .................................................................................................................... 8 2.4 Water Demand and Potential Stress .........................................................................8 2.4.1 Water Use .............................................................................................................. 8 2.4.2 Potential Stress ....................................................................................................... 9 3. Water Budgets ..................................................................................................................10 3.1 Overview ................................................................................................................10 3.2 Long-Term Annual Water Budgets for Gauged Subwatersheds ...........................12 3.2.1 The Water Budget Equation ................................................................................ 12 3.2.2 Sources of Data for Water Budget Terms ............................................................ 12 3.2.3 Example Annual Water Budget for Millhaven Creek .......................................... 14 3.2.4 Summary of Results ............................................................................................. 14 3.3 Long-Term Monthly Water Budgets for Gauged Subwatersheds .........................16 3.3.1 Long-Term Monthly Water Budget for Wilton Creek ......................................... 19 3.3.2 Long-Term Monthly Water Budget for Millhaven Creek ................................... 21 3.3.3 Long-Term Monthly Water Budget for Collins Creek ........................................ 23 3.3.4 Long-Term Monthly Water Budget for Little Cataraqui Creek ........................... 25 3.3.5 Long-Term Monthly Water Budget for Cataraqui River ..................................... 27 3.3.6 Long-Term Monthly Water Budget for Lyndhurst Creek ................................... 29 3.3.7 Long-Term Monthly Water Budget for Lyn Creek ............................................. 31 3.3.8 Long-Term Monthly Water Budget for Buells Creek .......................................... 33 3.4 General Discussion for Gauged Subwatersheds ....................................................35 3.5 Water Budgets for Ungauged Subwatersheds ........................................................35 3.5.1 Long-Term Water Budget for Sydenham Lake ................................................... 35 3.6 Uncertainty in Water Budget Components ............................................................38 FR110740301_100223.docx ii Tier 1 Water Budget and Stress Assessment TABLE OF CONTENTS 4. SUPPLY AND RESERVE .......................................................................................................40 4.1 Surface Water .........................................................................................................40 4.1.1 Gauged Subwatersheds ........................................................................................ 40 4.1.2 Ungauged Subwatersheds .................................................................................... 40 4.2 Groundwater Assessment.......................................................................................40 4.2.1 General Notes on Recharge ................................................................................. 41 4.3 Groundwater Supply for Subwatersheds ...............................................................42 4.3.1 Previous Estimates of Recharge for Subwatersheds ............................................ 42 4.3.2 Recharge Estimates for Gauged Subwatersheds .................................................. 44 4.3.3 Recharge Estimates for Ungauged Subwatersheds .............................................. 45 4.4 Groundwater Supply for Municipal Supplies ........................................................46 4.4.1 Cana Subdivision Summary ................................................................................. 46 4.4.2 Lansdowne Summary .......................................................................................... 47 4.4.3 Miller Manor Summary ....................................................................................... 47 5. DEMAND .............................................................................................................................50 5.1 Consumptive Use Factors ......................................................................................50 5.2 Seasonal Use ..........................................................................................................50 5.3 Permitted Takings ..................................................................................................51 5.4 Non-Permitted Use.................................................................................................52 5.4.1 Non-Serviced Residential Demand ...................................................................... 52 5.4.2 Agricultural Demand ........................................................................................... 52 5.5 Scaling up Demand for Future Conditions ............................................................53 6. STRESS ...............................................................................................................................54 6.1 Surface Water .........................................................................................................54 6.2 Groundwater ..........................................................................................................55 6.3 Final Stress Level Assignment...............................................................................56 6.4 Stress and Uncertainty Summary ...........................................................................56 6.4.1 Surface Water ...................................................................................................... 56 6.4.2 Groundwater ........................................................................................................ 61 7. DATA GAPS/LIMITATIONS .................................................................................................65 7.1 Gaps in Demand .....................................................................................................65 7.2 Gaps in (Supply – Reserve) for Surface Water ......................................................65 7.3 Gaps in (Supply – Reserve) for Groundwater ........................................................65 8. SUMMARY, CONCLUSIONS AND RECOMMENDATIONS ......................................................67 8.1 Summary ................................................................................................................67 8.2 Conclusions: Water Budget ...................................................................................67 8.3 Conclusions: Stress for Subwatersheds .................................................................68 8.4 Recommendations ..................................................................................................69 9. REFERENCES ......................................................................................................................70