2015 Urban Water Management Plan for Santa Clarita Valley
Total Page:16
File Type:pdf, Size:1020Kb
FINAL 2015 Urban Water Management Plan for Santa Clarita Valley Prepared for Castaic Lake Water Agency (CLWA) CLWA Santa Clarita Water Division Newhall County Water District Valencia Water Company (Los Angeles County Waterworks District No. 36/Cooperating Agency) Prepared by Kennedy/Jenks Consultants Nancy Clemm , P.E. Luhdorff & Scalmanini Consulting Engineers Stacy Miller Public Affairs June 2016 2775 North Ventura Road, Suite 100 Oxnard, California 93036 805-973-5700 FAX: 805-973-1440 2015 Santa Clarita Valley Urban Water Management Plan Final July 1, 2016 K/J Project No. 1544214*00 Table of Contents List of Tables ............................................................................................................................... vii List of Figures............................................................................................................................... ix List of Appendices ........................................................................................................................ ix List of Abbreviations and Acronyms .............................................................................................. x Section 1: Introduction ............................................................................... 1-1 1.1 Overview ............................................................................................. 1-1 1.2 Purpose ............................................................................................... 1-1 1.3 Basis for Preparing a Plan ................................................................... 1-3 1.4 Implementation of the Plan.................................................................. 1-3 1.4.1 Public Water Systems .............................................................. 1-3 1.4.2 Agencies Serving Multiple Service Areas/Public Water Systems ................................................................................... 1-4 1.4.3 Fiscal or Calendar Year ........................................................... 1-4 1.4.4 Joint Preparation of the Plan .................................................... 1-4 1.4.5 Plan Adoption ........................................................................... 1-8 1.4.6 Public Outreach........................................................................ 1-8 1.4.7 Resources Maximization .......................................................... 1-9 1.5 Water Management within CLWA’s Service Area ............................. 1-10 1.5.1 Castaic Lake Water Agency ................................................... 1-10 1.5.2 Retail Water Purveyors .......................................................... 1-11 1.6 Climate .............................................................................................. 1-13 1.7 Potential Effects of Climate Change.................................................. 1-14 1.8 Climate Change Vulnerability Analysis.............................................. 1-15 Section 2: Water Use .................................................................................. 2-1 2.1 Overview ............................................................................................. 2-1 2.2 Demographics ..................................................................................... 2-2 2.3 Historical Water Use............................................................................ 2-2 2.4 Projected Water Use (Demand) .......................................................... 2-4 2.4.1 Purveyor Demand Projections ................................................. 2-4 2.5 Distribution System Water Loss ........................................................ 2-11 2.6 Population ......................................................................................... 2-11 2.6.1 Historical Population .............................................................. 2-11 2.6.2 Population Projections ........................................................... 2-17 2.6.3 Comparison to City and County Planning .............................. 2-18 2.7 Existing and Targeted Per Capita Water Use ................................... 2-19 2.7.1 Base Daily Per Capita Water Use for SBX7-7 Reduction ...... 2-19 2.7.2 Urban Water Use Targets for SBX7-7 Reduction .................. 2-23 2.7.3 2015 Interim Target Compliance ............................................ 2-27 Santa Clarita Valley Urban Water Management Plan Final i Table of Contents (cont’d) 2.7.4 Purveyor Demand Projections and SBX7-7 Objectives ......... 2-27 2.7.4.1 Lower Income Projected Water Demands ........... 2-30 2.8 Other Factors Affecting Water Usage ............................................... 2-32 2.8.1 Weather Effects on Water Usage ........................................... 2-32 2.8.2 Conservation Effects on Water Usage ................................... 2-32 Section 3: Water Resources ....................................................................... 3-1 3.1 Overview ............................................................................................. 3-1 3.2 Wholesale (Imported) Water Supplies ................................................. 3-4 3.2.1 State Water Project Supplies ................................................... 3-4 3.2.1.1 Background ............................................................ 3-4 3.2.1.2 SWP Table A Supply Assessment ....................... 3-10 3.2.2 Other Imported Supplies ........................................................ 3-14 3.2.2.1 Buena Vista-Rosedale Rio Bravo ........................ 3-14 3.2.2.2 Nickel Water - Newhall Land................................ 3-15 3.2.2.3 Yuba Accord Water .............................................. 3-15 3.3 Groundwater ..................................................................................... 3-17 3.3.1 Santa Clara River Groundwater Basin – East Subbasin ........ 3-17 3.3.2 Adopted Groundwater Management Plan .............................. 3-18 3.3.2.1 Available Groundwater Supplies .......................... 3-21 3.3.2.2 Alluvium ............................................................... 3-26 3.3.2.3 Saugus Formation ............................................... 3-32 3.3.3 Existing and Planned Groundwater Pumping ........................ 3-38 3.3.3.1 Impacted Well Capacity ....................................... 3-38 3.3.3.2 Alluvium ............................................................... 3-39 3.3.3.3 Saugus Formation ............................................... 3-39 3.3.3.4 Summary ............................................................. 3-40 3.4 Transfers and Exchanges ................................................................. 3-45 3.4.1 Core Transfers ....................................................................... 3-45 3.4.2 Spot Market Transfers ............................................................ 3-45 3.4.3 Option Contracts .................................................................... 3-46 3.4.4 Future Market Transfers ......................................................... 3-46 3.4.5 Water Exchanges ................................................................... 3-46 3.5 Groundwater Banking Programs ....................................................... 3-46 3.5.1 Semitropic Banking Program ................................................. 3-47 3.5.2 Rosedale-Rio Bravo Banking Program .................................. 3-48 3.5.3 Semitropic Banking Program – Newhall Land ........................ 3-49 3.5.4 Other Opportunities ................................................................ 3-49 3.6 Planned Water Supply Projects and Programs ................................. 3-49 3.7 Development of Desalination ............................................................ 3-50 3.7.1 Opportunities for Brackish Water and/or Groundwater Desalination ........................................................................... 3-50 3.7.2 Opportunities for Seawater Desalination ................................ 3-50 Santa Clarita Valley Urban Water Management Plan Final ii Table of Contents (cont’d) Section 4: Recycled Water ......................................................................... 4-1 4.1 Recycled Water Master Plan ............................................................... 4-1 4.2 Existing Wastewater Treatment Facilities ........................................... 4-2 4.3 Wastewater Treatment Facility Improvements and Expansions ......... 4-3 4.4 Recycled Water Supply and Demand ................................................. 4-7 4.5 Other Potential Sources of Recycled Water ...................................... 4-12 4.6 Recycled Water Demand .................................................................. 4-12 4.7 Recycled Water Comparison ............................................................. 4-16 4.8 Methods to Encourage Recycled Water Use .................................... 4-16 4.9 Optimization Plan for Recycled Water ............................................... 4-17 4.10 Additional Considerations Relating to the Use of Recycled Water ................................................................................................. 4-18 4.10.1 SCVSD Chloride Compliance Plan ........................................ 4-18 4.10.2 Salt and Nutrient Management Plan ...................................... 4-19 4.10.3 Water Quality Control Plan (Basin Plan) ................................ 4-20 4.10.4 Nutrients ................................................................................