2_Presentation on revisions to the draft Water Forward 2024 plan report, including preliminary CRLA recommendations — original pdf

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Presentation on revisions to the draft Water Forward 2024 plan report, including preliminary Colorado River Land Analysis recommendations September 19, 2024 Further Water Forward 2024 plan revisions 3 Further Revisions  Presented in 9/10 meeting • Comparison of WF18 and WF24 strategies • Summary of strategy yields and costs  To be discussed today • Draft 100 Year Adaptive Management Pathways • Additional information on Colorado River Land Analysis plan development  Ongoing work • Editorial review, graphic design, etc. • Confirming plan alignment with WCP/DCP Draft 100 Year Adaptive Management Pathways Portfolio 6 in 2080  Adaptive pathways identify signposts that may prompt us to pursue different water management strategies in the very long-term future If Climate = historic If Climate = 2.6 (low severity) If Climate = 4.5 (medium severity) If Demand = Low If Demand = Med If Demand = High If Demand = Low If Supply = Med If Supply = Low, High If Supply = Low, Med If Supply = High If Supply = Med, High If Supply = Low If Demand = Med, High If Demand = Low If Supply = Low, Med If Supply High If Demand = High If Supply = Med If Supply = Low, High 4 6A 6A 6B 6B 6C 6C 6A 6B 6C 6B 6C 6B 6B 6C If Climate = 8.5 (high severity) If Demand = Med Draft 100 Year Adaptive Management Portfolios 5 Water Forward Strategies Water Conservation Strategies Utility-Side Water Loss Control Customer-Side Water Use Management Native & Efficient Landscaping Water Conservation Strategies Sub-Total Non-Potable Water Reuse Strategies Centralized Reclaimed Decentralized Reclaimed Onsite Reuse Non-Potable Reuse Strategies Sub-Total Potable Water Supply Strategies Aquifer Storage and Recovery Lake Walter E. Long (Decker) Off Channel Reservoir Indirect Potable Reuse Brackish Groundwater Desalination Additional Colorado River Basin-Independent Supply* Additional Colorado River Basin Supply** Water Supply Strategies Sub-Total Water Forward Strategies Overall Total Estimated Yield (Acre Feet per Year) Portfolio 6 2080 Portfolio 6A 2120 Portfolio 6B 2120 Portfolio 6C 2120 15,000 11,400 7,000 33,400 26,900 1,300 10,600 38,800 44,500 18,300 22,400 40,000 0 0 125,200 197,400 26,300 13,100 10,900 50,300 41,700 3,100 16,300 61,100 44,500 18,300 33,600 40,000 20,000 0 156,400 277,800 26,300 13,100 10,900 50,300 41,700 3,100 16,300 61,100 83,000 18,300 22,400 40,000 20,000 35,000 218,700 340,100 26,300 13,100 10,900 50,300 41,700 3,100 16,300 61,100 44,500 18,300 44,800 40,000 60,000 30,000 237,600 359,000 Current Supplies Colorado River and Highland Lakes Supply Centralized and Decentralized Reclaimed Water System * These supplies would be from sources outside of the Colorado River and Highland Lakes basin. The specific make-up of these supplies would be determined in the future. ** These supplies would be from sources inside of the Colorado River and Highlands Lakes Basin. The specific make-up of these supplies would be determined in the future. 325,000 5,000 Colorado River Land Analysis Update Overview 7  Colorado River Land Analysis (CRLA) Background  Updated Strategy To Develop CRLA Program  Next Steps CRLA Scope  Goal is to protect drinking water quantity and quality  Potential strategies include fee-simple acquisition, conservation easements, direct payments to landowners, and education and outreach  These strategies build off the expertise of Austin Water’s Wildland Conservation Division, which protects over 48,000 acres of land for water, wildlife, and people  This work is in addition to other ongoing Austin Water and City of Austin land conservation programs to protect Barton Springs, the Edwards Aquifer, and other key areas Previous Stakeholder Meetings Austin Water has met with the following organizations to discuss the Colorado River Land Analysis and Water Forward 2024. Austin Area Environmental Organizations Hill Country Environmental Organizations 9 Austin Parks Foundation Austin Sierra Club Interfaith Environmental Network Clean Water Action Save Barton Creek Association Earth Day Austin Save our Springs Alliance Environment Texas Texas Water Foundation Friends of Barton Springs Pool Colorado River Land Trust Hill Country Alliance Hill Country Conservancy Texas Partnership for Forests and Water Natural Wildlife Federation Natural Resources Conservation Service Nature Conservancy Texas Land Trust Council Texas Agriculture Land Trust Texas Hill Country Conservancy Network Texas Collaborative Conservation Network Austin Water also contacted additional organizations with an invitation to meet and will pursue follow up with those organizations as part of ongoing community and stakeholder outreach. Central Texas and waterways of interest Rivers • • Colorado Llano • • • • Pedernales San Saba North Llano South Llano Watersheds • Middle Colorado, Brady, San Saba, Llano, North Llano, South Llano, Buchanan-LBJ Lakes, Pedernales, Lake Travis, Lake Austin Lake Austin Watershed (92 sq. mi.) Barton Springs Zone (371 sq. mi.) Identifying Priority Conservation Areas in the Highland Lakes Watershed  Helps understand solution geography and scale • Lake Travis drainage area is 40x that of entire Austin corporate limits! • Want/need to focus on the highest priority areas within this large basin • Some areas clearly more critical to conserve than others  Rating system: consider multiple factors • Water supply: stream flows, recharge, springs, wells, AW intakes • Environmental: riparian/floodplains, impervious cover, protected lands, slopes, vegetation  Combine via GIS to spatially show priority conservation areas in the Highland Lakes Watershed GIS analysis factors: scales and weights Preliminary Colorado River Land Analysis Recommendations 13  Further refine conservation prioritization model based on stakeholder feedback  Conduct additional analysis to include economic, equity, and social factors + further watershed modeling  Engage with land conservation and governmental entities; evaluate potential partnership opportunities  Evaluate funding strategies  Identify mix of land protection strategies; finalize program design CRLA Next Steps 14  Update CRLA sections in WF24 plan report, reflecting strategy recommendations and stakeholder feedback  Begin implementation planning in early 2025, including additional stakeholder and community engagement  Continue coordinating with ongoing Austin Water, City-wide, and partner COA department land conservation efforts WF24 - What’s Next? Meeting Timeline and Topics 15  10/8 Council Work Session  10/9 Water and Wastewater • Staff to present on WF24 plan report, Revised WCP/DCP  10/8 Water Forward Task Force Commission Meeting • WWC Action: Recommendation to Council on WF24 plan report, Revised WCP/DCP Meeting • Task Force Action:  11/7 Council Meeting Recommendation to Council on WF24 plan report, Revised WCP/DCP • Council Action: Council consideration of WF24 Plan, Revised WCP/DCP Questions? 17 Total Annual Community Cost ($ per acre foot per year)* Updated: Summary of Water Forward 2024 Strategies Water Forward Strategies Water Conservation Strategies Utility-Side Water Loss Control Customer-Side Water Use Management Native & Efficient Landscaping Water Conservation Strategies Sub-Total Non-Potable Water Reuse Strategies Centralized Reclaimed Decentralized Reclaimed Onsite Reuse Non-Potable Reuse Strategies Sub-Total Potable Water Supply Strategies Aquifer Storage and Recovery Lake Walter E. Long (Decker) Off Channel Reservoir Indirect Potable Reuse*** Brackish Groundwater Desalination Water Supply Strategies Sub-Total Average/ Drought Both Both Both - Both Both Both - Both Both Drought Both - 2,800 2,400 1,300 6.500 1,100 0 1,100 2,200 0 0 ** 0 0 Estimated Yield (Acre Feet per Year) 2030 2040 2050 2060 2070 2080 7,500 4,700 2,700 14,900 8,200 200 4,000 12,400 44,500 18,300 ** 0 62,800 90,100 9,400 6,400 3,800 19,600 12,900 500 5,700 19,100 44,500 18,300 22,400 0 85,200 11,300 8,100 4,800 24,200 17,600 800 7,300 25,700 44,500 18,300 22,400 0 85,200 325,000 5,000 13,200 9,800 5,900 28,900 22,300 1,100 9,000 32,400 44,500 18,300 22,400 20,000 105,200 166,500 15,000 11,400 7,000 33,400 26,900 1,300 10,600 38,800 44,500 18,300 22,400 40,000 125,200 197,400 $267 $52 $5,112 $2,243 $5,158 $8,957 $2,003 $3,033 $880 $2,688 Water Forward Strategies Overall Total 8,700 123,900 135,100 Current Supplies Colorado River and Highland Lakes Supply Centralized and Decentralized Reclaimed Water System * Community cost = Utility cost + Customer cost ** May be implemented earlier in severe drought conditions *** Will be separated into “Indirect Potable Reuse” and “Capture Local Inflows to Lady Bird Lake” in WF24 plan Both Both Updated: Water Forward- 2018 compared to 2024 18 Estimated Yield (Acre Feet per Year) Water Forward 2024 Water Forward 2018 2070 2040 10,900 9,300 18,500 10,900 8,500 3,600 37,900 23,800 2070 13,200 9,800 5,900 28,900 2040 7,500 4,700 2,700 14,900 Water Conservation Strategies Utility-Side Water Loss Control Customer-Side Water Use Management1 Native & Efficient Landscaping2 Water Conservation Strategies Sub-Total Non-Potable Water Reuse Strategies Centralized Reclaimed Decentralized Reclaimed Onsite Reuse3 Non-Potable Reuse Strategies Sub-Total Potable Water Supply Strategies Aquifer Storage and Recovery Lake Walter E. Long (Decker) Off Channel Reservoir4 Indirect Potable Reuse (includes Capture Local Inflows) 5 Brackish Groundwater Desalination Water Supply Strategies Sub-Total Water Forward Strategies Overall Total Current Supplies Colorado River and Highland Lakes Supply Centralized and Decentralized Reclaimed Water System 1) WF24 Customer-Side Water Use Management compared to the following WF18 strategies: Advanced Metering Infrastructure, CII Ordinances, Water Use Benchmarking and Budgeting 2) WF24 Native& Efficient Landscaping compared to the following WF18 strategies: Landscape Transformation Ordinance, Landscape Transformation Incentive, Irrigation Efficiency Incentive 3) WF24 Onsite Reuse compared to the following WF18 strategies: Lot Scale Stormwater Harvesting, Lot Scale Rainwater Harvesting, Lot Scale Graywater Harvesting, Lot/Building Scale Wastewater Reuse, AC Condensate Reuse, Sewer Mining, and Community Scale Stormwater Harvesting 4) In WF18, this strategy was included as a new, to-be-constructed off-channel reservoir 5) Will be separated into “Indirect Potable Reuse” and “Capture Local Inflows to Lady Bird Lake” in WF24 plan ** May be implemented earlier in severe drought conditions 60,000 0 14,000 0 74,000 120,600 60,000 25,000 23,000 5,000 113,000 209,800 44,500 18,300 22,400 20,000 105,200 166,500 44,500 18,300 ** 0 62,800 90,100 12,000 3,200 7,600 22,800 25,000 14,500 19,400 58,900 22,300 1,100 9,000 32,400 8,200 200 4,000 12,400 325,000 5,000