Cal Water SGMA Outreach Meeting November 14, 2018 Welcome Event - - PowerPoint PPT Presentation

Cal Water SGMA Outreach Meeting November 14, 2018

Welcome

Event Format

• Open house style
• 30 minute introductory presentation
• Opportunity to ask questions, learn more, and

provide input!

3

About SGMA

What is SGMA?

5

The Sustainable Groundwater Management Act,

• r SGMA, is new statewide legislation that

establishes a path for the sustainable management of groundwater for the first time in California’s history.

What Does SGMA Require?

• Groundwater Sustainability Agencies (GSAs) must

be formed. GSAs must prepare and submit Groundwater Sustainability Plans (GSPs) by

• January 2020, for critically overdrafted basins
• January 2022, for remaining high and medium

priority basins

• GSPs must include measurable objectives and

milestones in increments of five years to achieve sustainability within 20 years of GSP adoption

• GSP development must be open and transparent

6

Where is the Eastern San Joaquin Subbasin Boundary?

7

ESJ Subbasin boundaries:

• North – Dry Creek
• West – San Joaquin River
• South – Stanislaus River
• East – Sierra Nevada

Bedrock Outcrop 1,207 square miles

Eastern San Joaquin is Classified as a High Priority Critically Overdrafted Basin

8

Eastern San Joaquin Subbasin

This means an accelerated GSP submittal deadline

• f January 31,

2020

GSP Development Approaches

9

• One GSA assumes responsibilities and authorities for the entire basin
• New or existing agency

1 Basin, 1 GSA, 1 Plan

• Several GSAs in same basin
• Requires significant coordination among GSAs
• Still evaluated based on basin-level implementation of GSP

1 Basin, Multiple GSAs, 1 Plan

• Flexibility in terms of responsibilities and authorities
• Requires a single coordination agreement among all GSAs for the entire

basin

• Still evaluated based on basin-level implementation of GSP (could get messy)

1 Basin, Multiple GSAs, Multiple Plans ESJ Subbasin

GSP Development Tasks

Projects & Management Actions

Jun 2018

Hydrogeologic Analysis Data Management System Historical Water Budget Current Baseline Projected Water Budget

Water Accounting Measurable Objectives Minimum Thresholds Undesirable Results Economics & Funding Monitoring Network

Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec 2018 Jan 2019 Feb 2019 Mar 2019 Apr 2019 May 2019 Jun 2019 Jul 2019

Interim Milestones Technical Topics Policy Topics Implementation Topics Sustainability Goals

Hydrologic Model Draft GSP & Implement. Plan

Jan 2020

SGMA Requires Accounting of All Water Uses and Sources

• SGMA requires an accounting of

all groundwater and surface water entering and leaving a basin

• Through SGMA, GSAs are

required to bring the basin into balance, halting groundwater

• verdraft

11

SGMA Requires Six Sustainability Indicators to be Addressed

12

Chronic lowering of groundwater levels Degraded water quality Reduction of groundwater storage Seawater intrusion Land subsidence Depletions of interconnected surface waters

ESJ Subbasin: 17 GSAs, One GSP

17 GSAs are working collaboratively to develop a single GSP The GSAs formed the Eastern San Joaquin Groundwater Authority (GWA) to jointly develop and implement the Eastern San Joaquin GSP

13

Overview of Current Basin Conditions

Current Basin Conditions

15

Chronic lowering of groundwater levels Degraded water quality Reduction of groundwater storage Seawater intrusion Land subsidence Depletions of interconnected surface waters

What is the current status of Subbasin across each of the 6 sustainability indicators under SGMA?

1) Groundwater Elevations

16

Groundwater elevations have declined in recent decades due to increased pumping activity. Currently, a “cone of depression” exists in the central portion of the Subbasin, where elevations are at their lowest.

4th Quarter 2017 Groundwater Elevation (ft.)

2) Groundwater Storage

17

The Eastern San Joaquin Subbasin has large amounts of fresh groundwater stored in its aquifers – over 50 million acre-feet, or enough to theoretically sustain the basin for centuries. However, as groundwater elevations decline, it will become increasingly difficult and expensive to reach this water.

3) Water Quality

18

Salinity contamination of freshwater wells is a concern in some areas of the

• Subbasin. These areas are

primarily located in the western half of the Subbasin.

Maximum Total Dissolved Solids (TDS) 2008-2018 (mg/L)

4) Seawater Intrusion

19

Direct seawater intrusion does not occur in the Subbasin. Salinity will be addressed via the water quality sustainability indicator.

5) Land Subsidence

20

Subsidence potential exists in a small portion of the Subbasin where there is pumping from below the Corcoran Clay layer. Groundwater elevations in this area are typically high compared to the rest of the basin, and land subsidence is not likely.

Corcoran Clay Thickness (ft.)

6) Depletion of Interconnected Surface Waters

21

Streams identified as losing streams will be managed to protect against significant and unreasonable stream depletion.

Gaining Stream Losing Stream

Projects & Management Actions

Projects & Management Actions

23

• 31 potential projects have been

proposed to date

• These projects include a range of

groundwater recharge, surface water transfers, conservation and more! How will we reduce reliance on groundwater pumping, increase recharge, and bring the basin into balance by 2040?

24

Projects Received – Part 1 of 3

Project # Project Description Submitting GSA Category 1 Farmington Dam Repurpose Project SEWD Recharge 2 Lake Grupe In-Lieu Recharge SEWD Recharge 3 Raw Water Reliability and Recharge SEWD Recharge 4 SW Implementation Expansion SEWD SW Supply 5 SW Facility Expansion & Delivery Pipeline City of Lodi SW Supply 6 White Slough WPCF Expansion City of Lodi Recycling 7 Recycled Water Transfer to Agriculture City of Manteca Recycling/Transfers 8 Demand Management Measures City of Manteca Conservation 9 Water Transfers to SEWD and CSJWCD SSJ GSA Transfers 10 Increase Nick DeGroot SW Deliveries SSJ GSA SW Supply 11 City of Escalon Wastewater Reuse SSJ GSA Recycling

25

Projects Received – Part 2 of 3

Project # Project Description Submitting GSA Category 12 South San Joaquin Stormwater Reuse SSJ GSA Stormwater 13 Pressurization of SSJID Facilities SSJ GSA Conservation 14 BNSC Intermodal Facility Recharge Pond CSJWCD Recharge 15 CSJWCD Capital Improvement Program CSJWCD SW Supply 16 Recycled Water Program Expansion City of Lathrop Recycling 17 LAS-3 Percolation Basin City of Lathrop Recharge 18 Conjunctive Use of GW and SW City of Lathrop SW Supply 19 City of Lathrop UWMP Water Conservation City of Lathrop Conservation 20 NPDES Phase 2 MS4 Compliance Program City of Lathrop Stormwater 21 Water Meter Improvements City of Lathrop Conservation 22 City of Ripon Surface Water Supply SSJ GSA SW Supply

26

Projects Received – Part 3 of 3

Project # Project Description Submitting GSA Category 23 Cal Fed GW Recharge Project NSJWCD Recharge 24 Mokelumne River Loss Study NSJWCD Accounting 25 North System Modernization NSJWCD SW Supply 26 PDA Banking NSJWCD SW Supply 27 South System Modernization NSJWCD SW Supply 28 Tracy Lakes GW Recharge NSJWCD Recharge 29 Winery Recycled Water NSJWCD Recycling/Recharge 30 Advanced Metering Infrastructure City of Stockton Accounting 31 Mobilizing Recharge Opportunities San Joaquin County Recharge

Ways to Get Involved

GWA Website: esjgroundwater.org

28

Sign Up to Receive Updates and Announcements

29

Attend Meetings

30

Attend GWA Board Meetings

2nd Wednesdays, 11 AM Robert J. Cabral Center, Assembly Room 1

Attend GWA Advisory Committee Meetings

2nd Wednesdays, 9 AM Robert J. Cabral Center, Assembly Room 1

Attend GW Sustainability Workgroup Meetings

Approximately monthly (see website for updates)

Participate in Informational Meetings

Approximately quarterly (see website for updates)

Quarterly Informational Meetings

31

• Quarterly informational meetings

are held in locations throughout the Subbasin

• The next informational meeting will
• ccur in the January timeframe.

Details will be posted to the website and Facebook page

Watch for Information from Your Local GSA

32

Flyers: Available in English and Spanish Press Releases: For organizations to include in their newsletters/blogs Social Media Posts: Facebook posts and Tweets by GSA member agencies

We’re On Facebook!

33

https://www.facebook.com/ESJGroundwaterAuthority For information on upcoming events and updates on the GSP development process, you can follow the GWA on facebook.

Cal Water SGMA Outreach Meeting November 14, 2018