PowerPoint Presentation
Extracted text (via pymupdf)
5041 characters
Water Resources Update Including Tier 1 Colorado River Shortage City Council Workshop September 28, 2021 • For information and discussion • We will cover: – City’s water supplies – Current conditions for SRP and CAP, including Tier 1 shortage on the Colorado River – City’s Drought Management Plan – City’s water conservation programs 2 Purpose Water Resources Update We’re Prepared… 3 •Glendale has a strong water portfolio •We have planned for a shortage on the Colorado River system •We are continually planning for our water future City’s Water Service Area 4 •Serve residents and businesses east of 115th Ave •100-year Designation of Assured Water Supply from the Arizona Department of Water Resources Water Use for 2020 SRP Used CAP Used Groundwater Used Effluent Used SRP 45% CAP 45% Effluent 6% Groundwater 4% Glendale Water Use 5 2020 Total Water Used = 47,393 acre-feet • 1 acre-foot = 325,851 gallons • 1 acre-foot can supply a Glendale family of four for one year with some left over 6 City’s Supply vs 2020 Use City’s Assured Water Supply vs Use in 2020 SRP Used SRP Available CAP Used CAP Available Groundwater Used Groundwater Available SRP Used SRP Available Effluent Available CAP Used CAP Available Effluent Used Groundwater Available Groundwater Used Total Supply: 117,496 AF 7 Glendale Water Resources = One water system We use all sources throughout City CAP Water (Colorado River) SRP Water (Salt and Verde Rivers) Groundwater SRP Ground- Water • Salt River reservoirs are currently 74% full • Verde River reservoirs are currently 50% full • Total system is 71% full compared to same time last year at 85% full • Monsoon season helped, but winter runoff needed to fill reservoirs • For 2022, more SRP groundwater will be used for delivery SRP Supply Overview 8 Colorado River Shortage 9 Arizona will be in a Tier 1 shortage in 2022 • As projected by the Bureau of Reclamation’s August 24-Month Study • Based on water level elevation in Lake Mead on December 31, 2021 Tier 1 Reductions take place starting on January 1, 2022 : • Reduction to Arizona’s Colorado River Supply • Reductions taken from CAP 10 Supply Reductions to Arizona Shortage Tier Tier 0 Tier 1 Tier 2a Tier 2b Tier 3 Lake Mead Elevation < 1090’ < 1075’ < 1050’ < 1045’ < 1025’ Total CAP Loss for Arizona 192,000 AF 512,000 AF 592,000 AF 640,000 AF 720,000 AF Total CAP Loss for City of Glendale 0 AF 0 AF 171 AF 341 AF 682 AF 2021 2022 11 Lake Mead Water Level Declines 12 Lake Mead Water Level Declines Green line depicts Lake Mead’s shoreline in 1984 compared to the current extent of the lake in 2021 13 Tier 1 Shortage • Currently there is high probability that a Tier 2 shortage will occur in 2023. • The 24-month study projects Lake Mead’s elevation to drop to 1030 feet. Therefore, the Lower Basin States must meet with the Secretary of Interior. • Goal is to prevent the lake from dropping below an elevation of 1020 feet. 14 CAP Priority System Glendale’s CAP Supplies are higher priority M&I = Municipal and Industrial NIA = Non-Indian Agriculture High CAP Priority Low Glendale Impacts 15 •No cut to Glendale’s Colorado River supplies for 2022 •What happens if shortage continues after 2022? o Arizona’s Drought Contingency Plan covers most losses through 2025 o Only a small loss to Glendale’s lower priority water Less than 3% of our water portfolio o Impacts after 2025 – to be determined Drought Management Plan 16 • It’s a plan to prepare and respond to water shortages. • Water Reduction Measures • In the City Code – Chapter 33 • Updated in 2016 • Currently reviewing and updating Drought Stages in the Plan 17 • Drought stages are based on water supply reductions. • Water supply and demand may change, so there is flexibility in the drought stage triggers. • Stages 1 & 2 – voluntary for customers. • Stages 3 & 4 – mandatory for customers. Water Demand and Population 18 200,000 205,000 210,000 215,000 220,000 225,000 230,000 235,000 240,000 245,000 - 10,000 20,000 30,000 40,000 50,000 60,000 Population Acre-feet Demand Population Water Conservation Programs 19 Maintain Best Management Practices: 1. Public Awareness 2. Education (Youth & Adult) 3. Landscape Rebate Program 4. Landscape Consultations & Water Budgets 5. Water Efficiency Assessments 6. Water Waste Investigations 7. Xeriscape Demonstration Garden www.glendaleaz.com/waterconservation Landscape Rebate Program 20 •Single-family homes – Up to $750 •New single-family homes – $200 •Non-residential customers – Up to $3,000 Glendale Water Efficiency Program 21 Number of participants and potential water savings: • 17 city facilities, 2.1 million gallons of water • 22 businesses, 8.2 million gallons of water NEW! Federal WaterSmart Grant 22 • Encourage municipal and non-residential customers to create water-efficient landscapes and meet the City’s water conservation goals. 23 Questions?