Austin Integrated Water Resource Planning Community Task Force - Nov. 8, 2022
Austin Integrated Water Resource Planning Community Task Force Special Called Meeting of the Austin Integrated Water Resource Planning Community Task Force
AUSTIN INTEGRATED WATER RESOURCE PLANNING COMMUNITY TASK FORCE November 8th, 2022 --12:00pm Hybrid Special-Called Meeting Austin Permitting and Development Center Room 1405 6310 Wilhelmina Delco Dr, Austin, TX 78752 Some members of the BOARD/COMMISSION may be participating by videoconference. The meeting may be viewed online at: http://www.austintexas.gov/page/watch-atxn-live For more information go to: Austin Integrated Water Resource Planning Community Task Force Public comment will be allowed in-person or remotely by telephone. Speakers may only register to speak on an item once either in-person or remotely and will be allowed up to three minutes to provide their comments. Registration no later than noon the day before the meeting is required for remote participation. The first 10 speakers to register will be allowed a three-minute allotment to address their concerns not on the agenda. To register, contact Jaynell Nicholson at jaynell.nicholson@austintexas.gov. The information required is the speaker’s name, item number(s) they wish to speak on if applicable, email address and telephone number (must be the same number that will be used to call into the meeting). CURRENT TASK FORCE MEMBERS: Voting Members: Bill Moriarty Hani Michel Perry Lorenz Sarah Faust Todd Bartee Robert Mace, Vice Chair Ex Officio Non-Voting Members: Austin Water: Kevin Critendon Austin Energy: Kathleen Garrett Austin Resource Recovery: Tony Davee Neighborhood Housing and Community Development: Tymon Khamsi Office of Innovation: Daniel Culotta Office of Sustainability: Lucia Athens Parks and Recreation: Liana Kallivoka Watershed Protection: Katie Coyne Vanessa Puig-Williams Jennifer Walker, Chair AGENDA CALL TO ORDER – PUBLIC COMMUNICATION: GENERAL APPROVAL OF MINUTES 1. Approval of the meeting minutes from the Regular Task Force meeting on September 20, DISCUSSION ITEMS 2022 staff 1. Update on water supply conditions, presented by Austin Water staff 2. Presentation of Water Forward 2018 implementation progress, presented by Austin Water • Water Forward 2018 Q4 Progress Report • Upcoming Milestones 3. Decentralized Reclaimed Planning Update, presented by Austin Water staff 4. Update on Water Forward 2024 project status, presented by Austin Water staff • Task Progress to Date and Upcoming Milestones • Overview of Scenario Planning Approach VOTING ITEMS 1. Proposed 2023 Meeting Dates FUTURE AGENDA ITEMS ADJOURNMENT The City of Austin is committed to compliance with the American with Disabilities Act. Reasonable modifications and equal access to communications will be provided upon request. Meeting locations are planned with wheelchair access. If requiring Sign Language Interpreters or alternative formats, please give notice at least 2 days …
WF24 Task Progress to Date WF24 Task Progress to Date Task Name Progress to Date Next Steps 2 Community Engagement • Identified preliminary Equity and Affordability themes from feedback compiled thus far • CAG has begun community outreach on E&A • Water Forward University Brown Bag 11/9 • Draft Equity and Affordability Roadmap • Revise draft Education and Engagement Plan themes 3 Planning • Drafted preliminary model logic for testing • Develop reliability metrics for use in testing Methodology combinations of water management strategies in scenarios. 4 Demand Forecast 5 Climate and Hydrology Analysis • Reviewed draft population and employment projections in Delphi sessions including Development Services and the City Demographer • Developed streamflow sequences for climate- adjusted hydrology for use in WF scenarios. • Met with the CTAG to discuss streamflow methodology and ensembling process. • combinations of water management strategies in scenarios Integrating feedback into revised population and employment projections. Begin integration into the updated Disaggregated Demand Model • Develop stochastically sampled sequences of streamflow for use in WF scenarios. • Continue to meet with CTAG to get input on process. Questions
Decentralized Reclaimed Water Forward Task Force November Meeting November 8, 2022 Decentralized Reclaimed: Water Forward Task Force Nov Meeting Agenda: • Decentralized Reclaimed Overview, 15 minutes • Where does Decentralized Reclaimed fit? • WF18 Targets • WF24 Update • Major Takeaways & Next Steps, 5 minutes • Discussion & Questions, 5 minutes Decentralized Reclaimed: Water Forward Task Force Nov Meeting Decentralized Reclaimed Decentralized Reclaimed is the collection of effluent from the wastewater system in development areas, treatment to non-drinking water quality at a small wastewater treatment plant, and reuse at the community scale via a decentralized reclaimed water distribution system that would be separate from the centralized reclaimed water system. Stormwater Harvesting Community Scale Sewer Mining Community Scale Distributed Wastewater Reuse Community Scale Decentralized Reclaimed Systems Decentralized Reclaimed: Water Forward Task Force Nov Meeting Water Forward 18 Targets • WF Targets estimated based on assumed uptake/saturation rates for each strategy. • Lot-scale reuse uptake rates ranged from 10% to 30% • Distributed WW Reuse uptake assumed to be 70% Strategy SF MF COM Scale 2040 Yield Target (MGD) Rainwater Harvesting Graywater Harvesting Blackwater Reuse A/C Condensate Reuse Stormwater Harvesting Sewer Mining Distributed WW Reuse Other Demand Mgmt Aquifer Storage & Recovery S S S S S S S S S S S S S S S S S S S 1.38 1.90 1.18 0.97 0.42 0.89 2.81 21.2 53.5 Lot Lot Lot Lot Lot N/A Lot/Community Lot/Community Community Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Decentralized Centralized Public Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Centralized Public Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Centralized Centralized Reclaimed • City/Service Area Scale • Blackwater • COA ownership/operation Public Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Decentralized Reclaimed • District/Neighborhood Scale • Blackwater/All of the Above • COA ownership/operation YOU ARE HERE Public Centralized Centralized Reclaimed • City/Service Area Scale • Blackwater • COA ownership/operation Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale …
Water Supply Update 12,10612,30610,0445,9506,7684,3997024,85222,5723,156025,00050,00075,000100,000125,000150,000175,000200,000225,000JanFebMarAprMayJunJulAugSepOctNovDecAcre-FeetHighland Lakes InflowsAverage 1942 - PresentAverage 2008 - 201520212022 (Jan.-Oct.) As of 11/7/2022 combined storage was at 1,051,422 acre-feet (52% full). 0200,000400,000600,000800,0001,000,0001,200,0001,400,0001,600,0001,800,0002,000,0002,200,000200520062007200820092010201120122013201420152016201720182019202020212022202320242025Storage, acre-feetCombined Storage of Lakes Buchanan and TravisJanuary 1, 2005 through November 1, 20220.6M ac-ft2.0M ac-ft Full StorageInterruptible stored water for non-Garwood agricultural operationswas not provided by LCRA in 2012 through 2015 and for second season in 2022. NOAA 3-Month Outlook LCRA Forecast Source Questions
Water Forward 2024: Scenario Planning Approach Drivers from Water Forward 18 Clearer approach to water needs identification More robust approach to addressing risk and uncertainty Development of a more comprehensive adaptive management plan Planning for plausibility vs. probability • Uncertain parameters cannot be predicted or well understood using standard statistical methods Predicting the most likely future or creating a plan that performs best on average vs. Finding robust strategies that perform well across a wide range of plausible futures, or scenarios Strategies perform well against “most likely” future conditions Strategies perform well across range of possible scenarios https://www.r-bloggers.com/2014/10/my-commonly-done-ggplot2-graphs/ Planning for Uncertainty in WF24 ▪ Develop a range of plausible future scenarios ▪ Find common near-term water management strategies (WMSs) that perform well over many scenarios ▪ For long-term (WMSs), develop an adaptive management plan with key decision points ▪ Continue to update the plan, re- evaluate, and adapt s o i r a n e c s g n i l e d o M Range of AW demands Possible climate futures Droughts worse than the drought of record Regional supply trends Water Forward 2024 Decision points including regular updates to the WF Plan Scenarios of plausible future water needs A C D B E 2120 Scenario planning examples Metropolitan Water District of Southern California Monterrey, Mexico https://www.rand.org/pubs/ tools/TL320/tool/case- studies/monterrey.html https://www.rand.org/pubs/tool s/TL320/tool/case- studies/southern-california.html WF24 scenario planning methodology overview Goal Define the needs Evaluate potential solutions Identify potential solutions Select the best solution & implementation strategy Ongoing community engagement and equity work Tasks Develop range of future scenarios WF18 implementation evaluation and update Preliminary needs assessment Identify, screen, and characterize additional WMS Use optimization model to identify top-performing WMSs over all scenarios Construct 50-yr portfolios for further evaluation 50-Year portfolio trade-off analysis Conduct vulnerability assessment to identify system stressors Preferred 50-yr portfolio & equity and affordability analysis Adaptive Management Plan (AMP) Outcome Updated WF18 strategies and range of baseline needs WMSs variables and rules for testing Evaluated 50-year portfolios and identified system stressors Water Forward 2024 Plan Timeline 2022 Fall 2024 Overview of planning scenarios Total water availability planning scenarios: 639 Range of future water availability sequences to test water management strategies (WMSs) 71 Hydrologic Scenarios 3 AW Demand Scenarios 1 Period of Record (POR) sequence 10 Droughts worse than the drought of record (DWDRs) stochastically sampled from POR hydrology 15 Global climate model (GCM) flow …
