South Orange County Watershed Management Area Stakeholder Workshop. April 30, 2013

Transcription

1 South Orange County Watershed Management Area Stakeholder Workshop April 30, 2013

2 Agenda Schedule of Review and Approval Process Overview Overview of the Proposition 84 Guidelines Overview of the Contents of the IRWM Plan Recap of the IRWM Plan for Call for Projects Overview of the Appendices Climate Change Report Flood Plan Salt & Nutrient Management Plan Groundwater Management Plan Data Management Sneak Preview Q & A

3 IRWM Plan Review Schedule Task Name Start Finish IRWMP Update 6/25/12 9/30/13 Prepare Draft IRWM 12/14/12 2/22/13 IRWM Management Committee Review 2/25/13 3/22/13 Public Review 4/15/13 5/03/13 Public Workshop (during review) 4/30/13 4/30/13 Prepare Draft Final IRWM 5/06/13 5/17/13 IRWM Management Committee Review 5/20/13 5/31/13 Prepare Final IRWM (incl. Groundwater, Salt-Nutrient Plans) 6/03/13 6/14/13 Executive Committee review of Final IRWM 6/17/13 6/28/13 Executive Committee meeting: approve IRWM 07/18/13 07/18/13 Local Approval Process 8/05/13 9/20/13 Due to State - 9/30/13 9/30/13 9/30/13

4 Proposition 84 Guidelines Establish General Process Institutionalize Procedures Authenticate Criteria Provide IRWM Plan Standards and Guidance Finalize Submittal Requirements

5 Contents of IRWM Plan Additions from 2006 Plan Flood Management Strategy Flood Management Plan Climate Change Analysis Groundwater Management Plan Salt and Nutrient Management Plan

6 IRWM Plan Call for Projects Call for Projects required a completed Project Form that include the following be provided: Implementation of IRWM Plan goals, objectives, and strategies Technical feasibility of the project Project Costs and financing Economic feasibility (cost/benefit consideration) Project Status; Ready to proceed Environmental clearance status Equitable geographic distribution of projects (regional impact) Reduction of imported water supply dependence Benefits to Region, including DAC and Native American tribes Environmental Justice Considerations Impacts on Climate Change an GHG emissions

7 IRWM Plan Call for Projects 82 projects were included from the 2006 Plan 57 projects added as part of the 2013 Update 139 total projects in the Plan now There is NO DEADLINE for current call for projects

8 Evaluation and Prioritization Proponent Municipal Water District of Orange County Audubon Starr Ranch Sanctuary Cities of Aliso Viejo, Lake Forest, Laguna Hills, and Laguna Woods Irvine Ranch Water District City of Dana Point South Coast Water District City of Laguna Niguel Project Name Grant Funding Request Comprehensive Landscape Water Use Efficiency Program $708,625 Yes Riparian Invasive Control, Restoration, Monitoring, and Education at Audubon Starr Ranch Sanctuary $229,500 Yes Dairy Fork Constructed Wetlands Recommended for Funding Round 2 $125,000 No, match not secured Baker Water Treatment Plant $500,000 Yes San Juan Creek Watershed Project not ready to Diversion L01S02 $385, 000 proceed Water Conservation, Implementation of Targeted Programs $375,000 Yes Oso Creek Multi-Use Trails $1,200,000 Project funded by M2

9 Appendices

10 Climate Change Report Patti Sexton, TetraTech

11 Climate Change Report So OC Sources of Water 20 th Century Climate Variability Climate Projections for So OC Greenhouse Gas Emissions Sea Level Rise Vulnerability Assessment

12 Climate Change Report So OC Water Sources

13 Climate Change Report 20 th Century Trends - Temperature Change

14 Climate Change Report 20 th Century Trend April-July Water Fractions (snowmelt)

15 Climate Change Report Temperature Predictions

16 Climate Change Report Precipitation Predictions

17 Climate Change Report CO River Water Supply vs Demand

18 Climate Change Report Sea Level Rise Area of Impact

19 Climate Change Report Number Project Name Water Savings Per Year (million gallons) (1 AF = 326,000 gallons) Assumptions Annual GHG Emissions Reduced (MTCO2e/yr) 1 Comprehensive Landscape Water Use Efficiency Program 289 Water saved is imported in the ratio 45% from Colorado River Aqueduct and 55% from the State Water Project Constructed wetland for improving quality of urban runoff form Dairy Fork Subwatershed Not quantified 3 Audubon Starr Ranch Sanctuary Not quantified 4 San Juan Creek Watershed Diversion Not quantified 5 Irvine Ranch Water District, Baker Treatment Plant 5,110 50% of the water is assumed to be local supply, 50% imported. Water savings are associated with substitution of imported water supply with local supplies. 15,315 6 Oso Creek Multi-Use Trails Project Not quantified 7 Water Conservation Programs in South Coast Water District 228 Water saved is imported in the ratio 55 from Colorado River Aqueduct and 45% from the State Water Project 683 GHG Reductions by IRWMP Projects

20 Climate Change Report Habitat Sea Level Rise Water Quality Water demand Water supply Flooding Vulnerability Assessment

21 Patti Sexton, TetraTech Flood Plan

22 Regional Settings Flood Hazards Proposed Improvements Emergency Response Financial Plan Flood Plan

23 Flood Plan Regional Settings

24 Flood Plan Flood Hazard

25 Flood Plan Management Actions Flood Insurance Hazard Mitigation Plans Projects OCFCD CI Plan City Plans WD Plans Proposed Improvements

26 Flood Plan Stage I Stage II Stage III Stage IV Emergency Response

27 Flood Plan Prop 84 IRWMP State $ Prop 50 Prop 13 Prop 1E Financial Plan Local + State + Federal

28 Salt & Nutrient Management Plan Brennon Flahive, South Orange County Wastewater Authority

29 South Orange County Wastewater Authority Recycled Water / Salt & Nutrient Management Plan Update April 30, 2013

30 About SOCWA 10 member agencies Manage two area wide Recycled Water Orders SOCWA MA helped pioneer use of recycled water several projects started early & mid 1960s SOCWA leads Region 9 in recycled water production

31 SOCWA Recycled Water Production

32 SOCWA Service Area Salt Modeling A salt model was developed for the San Juan Basin in the early 1990s The salt model demonstrated that Basin Plan amendments to Total Dissolved Solids (TDS) objectives were appropriate for some SOCWA area sub-basins Basin Plan Amendments lead to regional recycled water production approach and the formation of South Orange County Reclamation Authority

33 Salt & Nutrient Management Planning Background Water Board Adopted Recycled Water Policy in February 2009 All Basins in California must develop SNMP by May 2014 (2016) Level of SNMP effort appropriate for basin Stakeholder Process Amend Regional Board Basin Plans to incorporate local SNMPs

34 Region 9 - Guidelines SNMP Preparation of SNMP requires: Identifying aquifer(s) boundaries Characterize current basin water quality Determine basin assimilative capacity by considering: historic water quality salt & nutrient inputs and outputs ambient conditions beneficial uses & water quality objectives Identify locations & quantities of recharge to the aquifers Identify patterns of groundwater movement & pollutant transport Develop and evaluate strategies for controlling or managing salinity loads to aquifers, as appropriate and necessary

35 San Juan Basin

36 San Juan Basin Water Capacities Storage Capacity Historical estimates between 60, ,000 ac-ft Useful storage about 21,000 ac-ft Average Yield 8,000 10,000 ac-ft/yr Safe Yield ~ 13,000 ac-ft/yr Water Rights State Water Regional Control Board appropriative rights about 13,201 ac-ft/yr SOCWA Future Recycled Water Demand 30,000 ac-ft

37 SOCWA - Salt & Nutrient Management Planning Timeline May 2009 first SOCWA SNMP TAC Meeting June 2010 proposal SNMP Prop 84 Grant Funding October 2011 Initiated SNMP Scoping Plan September 2012 SOCWA Awarded Contract for a SNMP September 2013 Deliver SNMP to the Regional Board

38 Study Area Hydrologic Boundaries

39 SNMP Methodology Matrix

40 Study Area Levels of Analytical Focus

41 SOCWA SNMP Tasks Summarize Existing Groundwater Quality Data Identify Salt & Nutrient Sources Develop Models Evaluate Impacts to Groundwater Perform Salt/Nutrient Loading Analysis Identify Areas of Groundwater Degradation Develop Best Management Practices Develop Salt & Nutrient Management Plan Prepare the Final SNMP Report to Regional Board

42 Salinity Management Goals Recycled Water Perspective Increase Recycled Water Use in a Manner that is Protective of Groundwater Beneficial Uses & Objectives Increase Groundwater Production and Explore Recycled Water Recharge Opportunities Address Recycled Water Compliance and Assimilative Capacity Issues: TDS & Nitrogen Manganese Iron Fluoride

43 Groundwater Management Plan Don Bunts, Santa Margarita Water District

44 Update on Lower San Juan Basin Groundwater Management Plan Stakeholder s Update Meeting April 30, 2013

45 San Juan Basin Authority Mission Statement To develop and maintain a reliable, high quality economical local water supply for the residents in the San Juan Basin by maximizing water use through management of local ground and surface water of San Juan Creek and its tributaries, with due consideration for preservation, enhancement, and conservation of the environment, including, but not limited to, the natural resources, fish and wildlife, infrastructure improvements, and the cultural heritage of the area.

46 San Juan Creek Watershed

47 Total Storage Capacity ~26,000 acre-ft Water in Storage in 2010 ~20,000 acre-ft

48

49 Current Major Activities Working with MWDOC to finalize a groundwater model Identifies less water is available than previously thought Seawater intrusion is a possibility under current planned operations Updating the Groundwater Management Plan Options with and without SOCOD

50 Management Options Increase recharge Currently evaluating the use of in-channel recharge enhancement, San Juan Creek I-5 to Stonehill Potential to use as a seawater intrusion barrier Improve the robustness of groundwater pumping capacity Evaluate Ranney well system Joint operations Environmental concerns Potential opportunities for habitat enhancement

51 Data Management Marilyn Thoms, County of Orange

52 Map of Aliso Creek

53 Map of Aliso Creek

54 54

55 DISCUSSION