South Fork Kings GSA GSA Board Technical Workshop January 17, 2019 - - PowerPoint PPT Presentation

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South Fork Kings GSA GSA Board Technical Workshop January 17, 2019 - - PowerPoint PPT Presentation

May 17, 2023 278 likes •591 views

South Fork Kings GSA GSA Board Technical Workshop January 17, 2019 Agenda 1. General Update 2. Recap of October Meeting 3. Management Actions 4. GSA Role/Responsibility Discussion GSP Primary Chapters Basin Setting Sustainable

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SLIDE 1

South Fork Kings GSA GSA Board Technical Workshop January 17, 2019

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SLIDE 2

Agenda

  • 1. General Update
  • 2. Recap of October Meeting
  • 3. Management Actions
  • 4. GSA Role/Responsibility Discussion
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SLIDE 3

GSP Primary Chapters

  • Basin Setting
  • Sustainable Management Criteria
  • Monitoring Networks
  • Management Actions
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SLIDE 4

SFKGSA Visualization Model & GIS

Visualization GIS (Web-enabled)

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SLIDE 5

SFK Groundwater Quality

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SLIDE 6

Tulare Lake Subbasin (TLSB) Local Model

Model Boundary Tulare Lake Subbasin Boundaries

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SLIDE 7

Modeled Storage Change within TLSB

Long-Term Net Decline in Groundwater Storage within the TLSB

+ Storage increase from previous year

  • Storage loss from previous year

+ cumulative increase from 1990 cumulative loss from 1990

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SLIDE 8

50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%

  • 500
  • 400
  • 300
  • 200
  • 100

100 200

Water Level Elevation SFKGSA 20S20E 07H001M SFKGSA 20S20E28E003M Modeled GW Storage

Projecting Sustainability to 2040

zero change in storage Overdraft

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SLIDE 9

Projecting Sustainability to 2040

  • 100,000

200,000 300,000 400,000 500,000 600,000 700,000

TLSB SFKGSA

Total Pumping (AF)

Sustainable Yield Overdraft

Overdraft Sustainable Yield

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SLIDE 10

Thinking in % of Total……

  • 100,000

200,000 300,000 400,000 500,000 600,000 700,000

TLSB SFKGSA

Total Current Pumping (AF) Sustainable Yield Overdraft

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

TLSB SFKGSA

% Current Total Pumping Sustainable Yield Overdraft

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SLIDE 11

Defining Sustainable Yield

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

% Total Pumping

Sustainable Yield Overdraft

“Undesirable” Storage Decline = Overdraft Correction (We Are Here) “Undesirable” Subsidence = Yield Adjustment #1 (could be zero) “Undesirable” Water Quality = Yield Adjustment #2 (could be zero)

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SLIDE 12

3 Steps to Sustainability

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% SFKGSA

% Total Current Pumping Sustainable Yield Overdraft

  • 1. Correct overdraft (2040)

2. Maintain Sustainability 3. Adaptive Management

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SLIDE 13

Overdraft Reduction Allocation/Targets

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% SFKGSA

% Total Pumping

Sustainable Yield Overdraft

Overdraft Management Actions “Menu” 2020-2040

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SLIDE 14
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SLIDE 15

Overdraft Reduction Allocation/Targets

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% SFKGSA

% Total Pumping

Sustainable Yield Overdraft

Overdraft Management Actions “Menu”

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Retirement Water Export/Import Conservation/Reuse

S F K GS A

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SLIDE 16

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

GSA Implementation Issues

Role of GSA/Board

  • Overall Approach (GSA)

– Control versus influence – Carrot versus stick

  • Monitoring

– Verifying each contribution to

  • verdraft correction

– Tools for adaptive management

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SLIDE 17

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Reduction Allocation/Targets

Boundary Inflow/Outflow Improvements

  • Westside
  • North Fork Kings
  • El Rico
  • Kaweah/Tule
  • Mid-Kings
  • “A rising tide floats all boats”
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Overdraft Reduction Allocation/Targets

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

SW Delivery Improvement

  • Main Canal Lining
  • Secondary Canal Lining
  • Scheduling Improvements

SW Delivery efficiency = less pumping Minimize impacts to shallow wells

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SLIDE 19

Overdraft Reduction Allocation/Targets

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

On-Farm Efficiency Improvement

  • BMPs
  • System Pressurization
  • Drip Conversion
  • Sprinkler conversion

Reduced total demand = less pumping

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SLIDE 20

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Reduction Allocation/Targets

New Storage

  • Better use of existing storage
  • Wet Year Fill
  • Surface Water
  • Groundwater (aka Recharge)

In order to reduce overdraft, storage volume must be proportional to frequency of wet year conditions and ability to carry-over

Increased volume used in-lieu of pumping = pumping reduction

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SLIDE 21

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Reduction Allocation/Targets

Dry Year Management

  • Fallowing – Seasonal crop
  • Trading – Seasonal --> Permanent

In order to reduce overdraft, acreage in fallowing or trading program must be proportional to frequency of dry year conditions Reduced demand = less pumping

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Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Reduction Allocation/Targets

Land Conversion

  • Permanent retirement (e.g. solar)
  • Urban/Rural Conversion
  • Short/long term crop conversion

Reduced demand = less pumping

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SLIDE 23

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Reduction Allocation/Targets

Water Import/Export

  • Import more or export less
  • Permanent
  • Temporary

Reduces pumping

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Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Reduction Allocation/Targets

Conservation/Reuse

  • Municipal
  • Recreational (e.g. golf

course)

  • Public outreach
  • ASR/Indirect Potable Reuse

(IPR)

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Overdraft Reduction Allocation/Targets

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% SFKGSA

% Total Pumping

Sustainable Yield Overdraft

Overdraft Management Actions “Menu”

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

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SLIDE 26

Adaptive Management

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

Overdraft Management Actions “Menu”

  • 1-year/5-year/10-year reviews
  • Data Component

– GW/SW Monitoring – Water use – Water quality – Subsidence

  • “Program” Component

– Financial/economic – Legal/regulatory – Social/Public

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Adaptive Management – Mix of actions evolves

2020

5% of Goal

S F K GS A S F K GS A

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export

S F K GS A

2030

45% of Goal

2040

100% of Goal

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SLIDE 28

Surrounding Basin Infow/outflow Improvements SW Delivery Improvement On Farm Efficiency Improvement New Storage** Dry Year Management * Land Conversion Water Import/Export Conservation/Reuse

S F K GS A

SFKGSA Implementation Responsibilities

  • 2-Step Process

– Overdraft Correction – Sustainability Management

  • Overall Approach (GSA)

– Control versus influence – Carrot versus stick

  • Monitoring

– Verifying each contribution to

  • verdraft correction

– Tools for adaptive management

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SLIDE 29

Thank You

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Sustainable Yield Allocation

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% SFKGSA

% Total Pumping

Sustainable Yield Overdraft

Sustainable Yield Allocation Permane nt Crop Seasonal Crop

Livestock

Riparian

Industrial

Municipal/ Domestic

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