Update of Activities: Delta Watermaster Commission Meeting Highlights

Comparative study on water consumptive use in the Delta, implementation of new regulations, and the origin of the study funded by the Delta Protection Commission. Updates on a CU study meeting, funding partners, and the recent Diversion Reduction Program report are highlighted. The report showcases voluntary plans, achievements, and outcomes, emphasizing voluntary actions to address common water-related challenges.

• Water Conservation
• Delta Protection
• Water Management
• Research Study
• Environmental Policy

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1. Update of Activities Michael Patrick George, Delta Watermaster Delta Protection Commission Ryde Hotel March 17, 2016

2. Overview Comparative Study of Consumptive Use in the Delta Report on 2015 Diversion Reduction Program among in- Delta Riparians Salinity Hot Spots in the South Delta Implementation of New Measurement Regulation Enforcement Actions Consolidating Drought Lessons and Data

3. Origin of the CU Study Proof of concept sponsored by the DPC; thank you for continued support Controversy over quantification of in-Delta water use Multiple methods for measuring CU; little Delta calibration Rapidly developing technology Changing land uses, farming practices, and water rights administration Operating constraints based on drought impacts Recognition that CU is only one leg of the stool Need better data for operational and regulatory efforts Many parallel research efforts underway; coordination optimized and duplication minimized

4. Todays Update on CU Study Meeting of Study Participants this Morning Fully Funded, Subject to Partial Reimbursement UC Davis Center for Watershed Science is Lead Five Additional CIMIS Stations Deployed Land Use Survey: from trucks to satellites 2015/2016 Field Campaign for Reference Creation of Open Data with QA/QC Eight Methods to be Blind Tested & Compared Report Due in March of 2017 Study Results will Inform Policy

5. Thank You to Study Funding Partners State Water Resources Control Board Department of Water Resources Delta Stewardship Council Delta Protection Commission Delta Water Agencies San Luis Delta Mendota Water Authority Other co-funding commitments are under consideration Many entities have also contributed in kind

6. Diversion Reduction Program Report Published on March 11; Headlines: 217 Voluntary Plans Prepared, Covering 2/3 of the Central and South Delta: 180,000 acres (and portion of CCCo) Program Overachieved Target: 32% Reduction Reported Flexibility and Voluntary Nature of the Program Incentivized Creativity and Micro-response Helped to Avert Riparian Curtailment Great Example of Voluntary Action to Address a Common Problem Results without Waiving Cherished Rights, Going to Court, or Triggering Regulation Report Posted on Watermaster Website http://waterboards.ca.gov/water_issues/programs/delta_watermaster/d ocs/diversion_reduction15.pdf

7. Salinity Hot Spots in South Delta Six Exceedances of Project Permit Conditions Centered on Tracy Blvd. Monitor Complex, Long-term Problem Creates Friction and Tests Regulatory Credibility Watermaster Coordinating with Regional Board DWR Commissioned a New Study of Causes and Potential Remediation Options Collaborative Process Aims at Resolution

8. Measurement Regulation Implementation New Regulation (Jan. 19) Implements SB 88 Sets Measurement Accuracy Performance Standard for Diversions Greater than 10AFA May be Met with Device or Method Alternative Compliance Plan Allows Bespoke Response No Regulatory Approval Outreach Underway Data Avalanche Presents a Management Challenge

9. Enforcement of Water Right System Notices of Insufficient Supply Issued in 2015 Challenges Ensued Authority, Jurisdiction, Data, Methodology, etc. Both Court and Board Review Actions against WSID and BBID go to Water Board Hearing Next Week Also, a Tentative Decision in the Tanaka Case was Issued on Feb. 22 and Re-argued Mar. 11

10. Drought Lessons Challenge is to Consolidate the 2015 Chaos Current Hydrology Provides a Respite Need to Test Policies in Court Resolutions Insights from Administration of Water Rights in Extreme Shortage Should Inform Policies Projects Petition for Change in Water Rights Update of Delta Water Quality Control Plan Delta Plan Update and Implementation Future Water Right Administration Data Management and Use Curtailments among Riparian and Priority Claimants