Briefing on Groundwater Sustainability Plan Initiation Sonoma Valley Groundwater Sustainability Agency Advisory Committee Meeting April 10, 2018 sonomacountygroundwater.org
Presentation Overview 1. Groundwater Sustainability Plan Requirements 2. GSP Grant Application Work Plan 3. Proposed Schedule/Next Steps 4. Questions & Discussion sonomacountygroundwater.org
Groundwater Sustainability Plan Requirements DWR developed requirements and regulations – 2016 • Describe who you are and the basin’s geology and hydrogeology • Describe how you will define and measure sustainability • Identify programs and projects that get you to sustainability • Implementation information Ongoing development of Best Management Practices and Guidance Documents by DWR http://www.water.ca.gov/groundwater/sgm/gsp.cfm sonomacountygroundwater.org
Plan Area and Basin Setting Plan Area Basin Setting Largely organizational Largely technical section information – Geology • Maps of cities and towns • At least 2 geologic cross-sections per • Land use basin • Well density – Historical and current • Existing groundwater groundwater conditions and management activities budgets • Existing general plans • Groundwater recharge • Groundwater pumping • Change in storage • Estimate of Sustainable Yield – Future groundwater budget • Include effects of climate change – Existing monitoring programs sonomacountygroundwater.org
Sonoma Valley Groundwater Studies Key Findings/Outcomes: • Complex Geology • Brackish groundwater in southern Sonoma Valley • Increased pumping since early 1980s • Areas of declining groundwater levels • Development of Groundwater Flow Models USGS, 1960 DWR, 1982 USGS, 2006 SVGMP, 2014 sonomacountygroundwater.org
Sonoma Valley GMP Program Activities Groundwater-Level and Monitoring Well Construction Involvement of Streamflow Monitoring & Data Collection Community Stakeholders Groundwater Model Update and Initial Alternatives Analyses sonomacountygroundwater.org
New Requirements vs Existing Information: Plan Area and Basin Setting Example – Groundwater Conditions Example of Information available Additional GSP Requirements Required GSP from existing GMP or Component* studies Description of Annual and cumulative change in groundwater groundwater storage based on groundwater-level changes, elevation trends over description and map of known groundwater time, groundwater Groundwater contamination sites and plumes, rates and map of elevation Conditions land subsidence (as applicable) identification of hydrographs and interconnected surface waters and groundwater contour maps, dependent ecosystems and estimates on timing and groundwater quality quantity of stream depletions. data. *Represents one of many required GSP components sonomacountygroundwater.org
Sustainable Management Criteria Avoid “significant and unreasonable” undesirable results for the following six sustainability indicators: • Define basin-wide undesirable results for each applicable sustainability indicator (e.g., groundwater-levels will not fall below x% of well screens) • Set measureable thresholds and measurable objectives for each sustainability indicator • Iterative process that will require significant stakeholder and community input sonomacountygroundwater.org
sonomacountygroundwater.org
Project and Management Actions • Evaluate and select projects and actions that will achieve sustainability in 20 years (e.g., recycled water, stormwater recharge, groundwater banking, demand management, etc.) • Demonstrate sustainability will be maintained for 30 years thereafter • Agree on how to fund these programs • Backup or supplemental plans may be needed if preferred projects and programs are not adequate Projects & 2022 – 2042 Achieve Sustainability 2042 – 2072 Maintain Sustainability for Programs within 20 years next 30 years sonomacountygroundwater.org
Basin Advisory Panel Recommended Management Strategies WATER REUSE CONSERVATI ON of Urban, Non- use to offset Urban, & groundwater Agriculture pumping GROUNDWATER BANKING STORMWATE R Russian River to recharge winter-time water groundwater to recharge groundwater basin sonomacountygroundwater.org
GSP Work Plan Objectives • Meet SGMA requirements - establish criteria and management actions to achieve and maintain sustainable groundwater. • Build on strong technical foundation established through previous technical studies and voluntary groundwater management activities. • Provide opportunity for significant public and community engagement and integrate the perspectives and address the needs of the many diverse users and uses of groundwater resources within the basin. • Leverage local resources through continued regional coordination and information sharing. sonomacountygroundwater.org
Proc ocess f for or Son onoma V Val alley GSP D Devel elop opmen ment Sustainable 2021 2018 2022 2020 2019 by 2042 Initiate Plan & Define Sustainability & Evaluate & Scope Describe Basin Adopt Plan for How to Measure Projects/Actions Conditions Implementation ry s t en o Sustainable Management Projects and Management ◊ ◊ t Initial Notification Complete Plan and Adopt ◊ ◊ u Criteria em Actions Plan Area and Basin Setting Submit to DWR t ◊ ◊ Monitoring Program Implementation Plan a ◊ ◊ t l E S k r o s W itie l a tiv c Techni c A ity t en n em mu ag m ng o C E sonomacountygroundwater.org
Proc ocess f for or Son onoma V Val alley GSP D Devel elop opmen ment Sustainable 2021 2018 2022 2020 2019 by 2042 Initiate Plan & Define Sustainability & Evaluate & Scope Describe Basin Adopt Plan for How to Measure Projects/Actions Conditions Implementation Statutory Elements Sustainable Management Projects and Management ◊ ◊ Initial Notification Complete Plan and Adopt ◊ ◊ Criteria Actions Plan Area and Basin Setting Submit to DWR ◊ ◊ Monitoring Program Implementation Plan ◊ ◊ Develop Sustainable Identify, Evaluate, and Select Describe Plan Area Compile and Complete Management Criteria Proposed Projects and GSP Evaluate and Describe Basin • Sustainability goal Management Actions • Prepare Administrative Setting • Undesirable results • Computer model Hydrogeologic and Jurisdictional • Technical Work Minimum threshold • simulations information Conceptual Model • Measurable objective Feasibility analyses • • Executive Summary • Groundwater conditions Activities • Interim milestones • Screening & prioritization Water budget • Address Community • Data analysis and modeling • Uncertainty analyses Input • Management areas Assessment of data gaps and Contingency planning • Present GSP to GSA Board Update Computer Model improvement of monitoring Develop GSP Implementation Complete development of for adoption network Plan including: Submit GSP to DWR Data Management System Establish Monitoring Funding plan • and Public Data Portal Program with protocols to • Detailed schedule measure criteria • Reporting system Community Engagement sonomacountygroundwater.org
Recommend
More recommend
