Presentation - Chandler's Water Resources and Drought Plan
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Chandler’s Water Resources & Drought Preparedness Public Works & Utilities | Water Resources City Council Work Session – June 20, 2022 Agenda • Introduction • Chandler’s Water Supplies • Planning for Growth • Colorado River Shortage & Impacts to Chandler • Chandler’s Drought Preparation • Conservation Programs • Next Steps Where Does Our Water Come From? • Surface Water • Salt & Verde Rivers • Delivered by Salt River Project (SRP) • Roosevelt Water Conservation District (RWCD) • Colorado River • Delivered by Central Arizona Project (CAP) • Groundwater • Treated Wastewater (Reclaimed Water) Chandler’s Water Supplies Allotment (AF) Source Available at Build-out 59,530 Salt and Verde Water 38,755 CAP Water 6,346 Groundwater 104,631 Annual Drinking Water Supply 29,936 Annual Reclaimed Water Supply 57% 37% 6% Drinking Water Supply Salt and Verde Colorado River Groundwater Chandler Colorado River Salt River Verde River City of Chandler Surface Water Salt and Verde River Systems Chandler’s primary water supply comes from the Salt & Verde Rivers, stored in SRP reservoirs. SRP reservoirs are currently 68% full Colorado River water is stored in Lakes Powell and Mead Pumped uphill from Lake Havasu CAP Canal: 336 Miles Average Annual Delivery: 1.2 million AF/Year Central Arizona Project Canal Chandler Water Delivery Map SRP + CAP CAP RWCD & CAP Pecos SWTP SRP Member Lands OFF-Project Lands Non-Member Lands Groundwater Supplies • Chandler will rely on groundwater reserves during surface water shortages • 35 active wells provide redundancy (73 MGD) • Well maintenance and careful planning • Chandler has stored water in underground aquifers for recovery during surface water shortages. Questions? 35 City Wells – 73 MGD Capacity (12.6 MGD used in CY21) Groundwater Levels in Chandler Began monitoring in 2004 35 monitor stations (at well sites) 94% of well sites show stable or rising water levels Chandler Reclaimed Water 905 E. Queen Creek Rd. S. McQueen Rd. E. Queen Creek Rd. • Infrastructure planning started in the 1980’s • Reclaimed distribution system adds a new water supply, reducing demand for other supplies • Deliveries to over 360 customers (~30,000 AF) • HOA’s, Golf Courses & Parks • Schools & Businesses • Aquifer Recharge Facilities (underground storage) Water Reclamation Facility Chandler Reclaimed Water Delivery Area Careful long-term planning has Chandler well-positioned for continued growth Planning for Growth Shortage – it’s not a matter of if…it’s a matter of when. Surface Water Shortages • 88% of Chandler’s Colorado River supplies are high-priority contracts (impacted in Tier 3) • Year 2023 – Tier 2 Shortage (3% to 6% reduction) • Chandler off-project / non-member lands rely on Colorado River Water 25,000 26,000 27,000 28,000 29,000 30,000 31,000 32,000 33,000 34,000 2021 2022 2023 2024 2025 2026 Acre-Feet Chandler's Colorado River Supplies Projected Supply Projected Demand back Reservoir Storage • Salt and Verde reservoirs are highly variable, but historically recover quickly (57% of Chandler’s supply) • Colorado River reservoirs have steadily declined During surface water shortages, Chandler will rely on back-up supplies Chandler is Prepared for Drought Chandleraz.gov/drought 25 years of declining water use - Chandler cares about conservation Chandler Conserves 100 105 110 115 120 125 130 135 140 Residential Gallons Per Capita Daily Chandler Residential Per Capita Water Use Possible data error Chandleraz.gov/SaveWater Conservation Program 2021 Total 2021 Water Saved Program Description Water Audits (Residential) 917 53.3 million gal Find and fix leaks, identify irrigation efficiencies Water Audits (Commercial) 56 19.6 million gal Find and fix leaks, assistance with irrigation efficiency Landscape Consultation (Residential) 47 2.2 million gal Assist with water smart landscaping. Landscape Consultation (Commercial) 5 3.2 million gal Assist with water smart landscaping. Turf Removal Rebates 29 2.2 million gal Convert turf to xeriscape. Smart Irrigation Controller Rebates 221 0.3 million gal Smart controllers adjust watering based on weather and soil Chandler’s Programs Chandleraz.gov/SaveWater *based on 2021 conservation program results Updated information now available online Drought & Conservation Education Chandleraz.gov/SaveWater Chandleraz.gov/Drought Chandler’s Drought Plan includes expanded messaging Drought Awareness & Conservation Messages • Large Landscape Efficiency Program • City Drought Team & Dashboard Metrics • Future AMI Implementation • Blog posts & podcasts (increased frequency) Insert Stage Matrix Drought stages evaluate supply and implement additional conservation Chandler’s Drought Plan Drought Stages Declared by Trigger Response Stage 1 Water Resource Manager A surface water shortage is predicted. Drought public awareness campaign & expanded conservation messaging. Stage 2 Public Works & Utilities Director SRP Supplies reduced by > 40% and/or CAP Supplies reduced by > 10% Mandatory outdoor water use restrictions for municipal operations. Stage 3 City Manager SRP Supplies reduced by > 50% and/or CAP Supplies reduced by > 15% Voluntary outdoor water use reductions for businesses and residents and continuing mandatory reductions for municipal operations. Stage 4 City Council Conditions impacting the City’s ability to meet water demands Mandatory outdoor water use restrictions for businesses, residents and municipal operations. Note: Triggers could change as Chandler acquires additional supplies and/or drills additional wells Next Steps • Declare Stage One of Chandler’s Drought Management Plan and monitor Colorado River conditions. • Expand drought public awareness campaign and increase water conservation outreach. • Evaluate conservation opportunities within municipal programs and develop dashboard performance metrics. • Renew 100-Year Assured Water Supply Designation Questions? Chandler’s Aquifer & Wells Interactive