Tule Subbasin Sustainable Groundwater Management Act October 16, - - PowerPoint PPT Presentation

Tule Subbasin

Sustainable Groundwater Management Act

October 16, 2019

KEY SGMA TERMS

SGMA: Sustainable Groundwater Management Act – Described in the Water Code – A Law of the State of California GSA: Groundwater Sustainability Agency – Overarching body responsible for implementing SGMA – Defined by boundaries GSP: Groundwater Sustainability Plan – Each GSA adopts a GSP – GSP describes how the GSA will meet the requirements of the SGMA

OVERVIEW

1. Tule Subbasin Overview 2. Tule Subbasin Coordination Agreement 3. Overview of Tule Subbasin Groundwater Sustainability Plans

• Basin Setting
• Monitoring Plan
• Sustainable Management Criteria
• Projects and Management Criteria

4. Subbasin Grants 5. Budget, Financials Report & Funding Status

TULE SUBBASIN OVERVIEW

LTRID GSA ETGSA DEID GSA TRI-COUNTY WATER AUTHORITY GSA ALPAUGH GSA PIXLEY ID GSA

Lower Tule River ID GSA (LTRID GSA): 104,525 acres Eastern Tule GSA (ETGSA): 161,511 acres Pixley ID GSA: 69,803 acres Delano Earlimart ID GSA (DEID GSA): 64,134 acres Tri-County Water Authority GSA: 61,575 acres Alpaugh GSA: 14,437 acres Tulare County GSA: 2,408 acres

TOTAL Area: 477,000 ac.

Tule Subbasin Coordination Agreement

• Required by SGMA when there are multiple GSA’s with multiple GSPs in one Basin.

Components of the Draft Tule Subbasin Coordination Agreement:

• Process for submitting, amending, and periodic evaluation of each GSP and annual

reports

• Tule Subbasin Basin Setting (Attachment 2)
• Coordinated Data and Methodologies
• Sustainable Management Criteria
• Tule Subbasin Monitoring Plan (Attachment 1)

OVERVIEW OF THE TULE SUBBASIN GSPs

• Introduction
• Basin Setting
• Sustainable Management Criteria
• Monitoring Networks & Monitoring Plan
• Projects and Management Actions
• Plan Implementation
• References and Technical Studies

OVERVIEW OF THE TULE SUBBASIN GSPs

Basin Setting

• Hydrogeological Conceptual Model
• Existing Groundwater Conditions
• Water Budget
• Historical
• Future
• Sustainable Yield
• Management Areas

OVERVIEW OF THE TULE SUBBASIN GSPs

Basin Setting

The maximum quantity of water, calculated

• ver a base period representative of long-term

conditions in the basin and including any temporary surplus, that can be withdrawn annually from a groundwater supply without causing an undesirable result.

Sustainable Yield

SGMA Ch. 2; Sect. 10721(v) 130,000 acre-ft/yr of Groundwater Pumping

OVERVIEW OF THE TULE SUBBASIN GSPs

MONITORING PLAN

• Groundwater Levels: Depth to GW in Existing Wells or Monitoring Wells
• Groundwater Storage: Calculated Volume based on GW Levels
• Groundwater Quality: Utilize Water Quality Monitoring Data
• Land Subsidence: Extensometer, InSAR Data, GPS Benchmarks

OVERVIEW OF THE TULE SUBBASIN GSPs

Sustainable Management Criteria

(23 CCR § 351) (q) Interim Milestones: Refers to a target value representing measurable groundwater conditions, in increments of five years, set be an Agency as part of a Plan. (s) Measurable Objectives: Refers to specific, quantifiable goals for maintenance or improvement of specified groundwater conditions that have been included in an adopted Plan to achieve the Sustainability Goal of the basin. (t) Minimum Threshold: Refers to a numeric value of each sustainability indicator used to define Undesirable Results. (23 CCR § 354.26) (a) Undesirable Results: Significant and Unreasonable effects for any of the sustainability indicators caused by groundwater conditions occurring throughout the basins. (23 CCR § 354.24) Sustainability Goal: Absence of Undesirable Results within the basin by 2040

Sustainable Management Criteria

OVERVIEW OF THE TULE SUBBASIN GSPs

Sustainability Management Criteria

SUSTAINABILITY INDICATOR GW ELEVATION GW STORAGE GW QUALITY LAND SUBSIDENCE

UNDESIRABLE RESULT

Unreasonable Lowering of groundwater elevation below the minimum threshold for two consecutive years at greater than 50% of GSA Management Area RMS Sites, which results in significant impacts to groundwater supply

MEASUREMENT METHODOLOGY

Groundwater Elevations, as determined by measuring depth to groundwater at representative monitoring sites.

MINIMUM THRESHOLD

Varies By GSA

MEASURABLE OBJECTIVE

Varied By GSA

INTERIM MILESTONES

Varies By GSA

OVERVIEW OF THE TULE SUBBASIN GSPs

Projects & Management Actions

Gradual Ramp-Down Scenarios

GSA YEAR LTRID GSA Pixley ID GSA ETGSA DEID GSA Tri-County Water Authority GSA Alpaugh GSA 2020-2024

2.0 acre-feet/acre over Sustainable Yield 2.0 acre-feet/acre over Sustainable Yield 90% of Historical Pumping over Sustainable Yield No Change No Change Fallow 880 acres Fallow 5,000 acres

2025-2029

1.5 acre-feet/acre over Sustainable Yield 1.5 acre-feet/acre over Sustainable Yield 80% of Historical Pumping over Sustainable Yield 10% Annual Reduction in Historical Pumping

• ver Sustainable Yield

(Western Management Area)

Reduce Pumping 10,000 acre-feet/year Fallow 5,000 acres

2030-2034

1.0 acre-feet/acre over Sustainable Yield 1.0 acre-feet/acre over Sustainable Yield 30% of Historical Pumping over Sustainable Yield Sustainable Fallow 5,000 acres

2035-2039

0.5 acre-feet/acre over Sustainable Yield 0.5 acre-feet/acre over Sustainable Yield Sustainable Sustainable Sustainable Fallow 5,000 acres

2040+

Sustainable Sustainable

Subbasin Grants

Prop 1 Grant

Tule Subbasin Basin Setting / Water Budgets Tule Subbasin Coordination Agreement Tule Subbasin Monitoring Plan Installation of Monitoring Features

DWR Technical Support Service (TSS)

Installation of Monitoring Wells

Prop 68 Grant Application

Tule Subbasin Groundwater Flow Model Update Installation of Monitoring Features Tule Subbasin Data Management System

Current Budget & Financials

Administration/ Coordination

Fiscal Agent Administration MOU Meetings Coordination Agreement, Technical Review, and Annual Reports Outreach Material/ Website

Technical Work/ Studies

Annual Reports, Basin Meetings, and Administration Groundwater Flow Model Monitoring Plan and Implementation Data management

Grants

Subbasin SGMA Grant Applications

Budget Year operates from October 1, through September 30

Tule Subbasin GSPs

GSA Link To GSP Public Comment Period Ends Public Hearing for Adoption

LTRID GSA

http://www.ltrid.org/sgma/#gsp

• Dec. 19, 2019
• Jan. 14, 2020

Pixley ID GSA

http://www.ltrid.org/sgma/#gsp

• Dec. 20, 2019
• Jan. 9, 2020

ETGSA

https://easterntulegsa.com/gsp/

• Dec. 16, 2019
• Dec. 16, 2019

DEID GSA

https://deid.org/gsa/

• Dec. 1, 2019
• Jan. 2020

Tri-County Water Authority GSA

https://tcwater.org/

• Nov. 7, 2019
• Dec. 18, 2019

Alpaugh GSA

https://alpaughgsa.com/

Jan.14, 2020

• Jan. 2020

Questions ??

Tule Subbasin

Sustainable Groundwater Management Act

https://tulesgma.com/