Indian Valley Restoration and Water Luke Hunt Director of - - PowerPoint PPT Presentation

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Indian Valley Restoration and Water Luke Hunt Director of - - PowerPoint PPT Presentation

Feb 10, 2023 172 likes •593 views

Indian Valley Restoration and Water Luke Hunt Director of Headwaters Conservation American Rivers lhunt@americanrivers.org Julie Fair, Max Odland: American Rivers Austen Lorenz: SF State University Indian Valley 1. Flow 2. Groundwater 3.

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SLIDE 1

Indian Valley Restoration and Water

Luke Hunt Director of Headwaters Conservation American Rivers lhunt@americanrivers.org Julie Fair, Max Odland: American Rivers Austen Lorenz: SF State University

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SLIDE 2

Indian Valley

  • 1. Flow
  • 2. Groundwater
  • 3. Damage and Recovery
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SLIDE 3
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SLIDE 4

Indian Valley 3.5 acres of pond 2.0 acres of fill 1.2 miles of channel

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SLIDE 5
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SLIDE 6
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SLIDE 7
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SLIDE 8
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SLIDE 9

1 2 5 10 15

Lower Gauge

1 2

Upper Gauge

Discharge (cfs) Stage (ft)

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SLIDE 10

1 2 5 10 15

Lower Gauge

1 2

Upper Gauge

Discharge (cfs) Stage (ft)

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SLIDE 11

Discharge (cfs) Stage (ft)

1 2 3 4 50 100 150 200

Lower Gauge

1 2 3 4

Upper Gauge

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SLIDE 12

25

50

75 100

Jan 2013 Apr Jul Oct Jan 2014

Discharge (cfs)

Annual Flow

Upper Gauge Lower Gauge

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SLIDE 13

25

50

75 100

Jan 2013 Apr Jul Oct Jan 2014

Discharge (cfs)

Annual Flow

Upper Gauge Lower Gauge

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SLIDE 14

5 10.0 Jun 01 Jul 01 Aug 1 Sep 01

Discharge (cfs)

Summer Flow

Upper Gauge Lower Gauge

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SLIDE 15

5 10.0 Jun 01 Jul 01 Aug 1 Sep 01

Discharge (cfs)

Summer Flow

Sink Source Upper Gauge Lower Gauge

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SLIDE 16

0.0 2.5 5.0 7.5 10.0 Jul 01 Aug 01 Sep 01 0.0 2.5 5.0 7.5 10.0 Jul 01 Aug 01 Sep 01

Discharge (cfs)

2012 ( Before Project) 2013 (After Project) 2014

How Much? When?

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SLIDE 17
  • 2
  • 1

1 2

  • 2
  • 1

1 2 Jul 01 Aug 01 Sep 01 Jul 01 Aug 01 Sep 01

Discharge (cfs)

2012 ( Before Project) 2013 (After Project) 2014

Difference (Outflow – Inflow)

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SLIDE 18

Year Snow Water Eq

May 1 (in)

Total Summer Inflow

June-Sept (acre-ft)

Crossover Date

(Outflow > Inflow)

Meadow Subsidy

June-Sept (acre-ft)

2012 13 18.6 6/26 2.6 2013 10 19.9 6/17 5.4 2014 11.9 13.4 6/9 15.2

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SLIDE 19

Year Snow Water Eq

May 1 (in)

Total Summer Inflow

June-Sept (acre-ft)

Crossover Date

(Outflow > Inflow)

Meadow Subsidy

June-Sept (acre-ft)

2012 13 18.6 6/26 2.6 2013 10 19.9 6/17 5.4 2014 11.9 13.4 6/9 15.2

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SLIDE 20

Year Snow Water Eq

May 1 (in)

Total Summer Inflow

June-Sept (acre-ft)

Crossover Date

(Outflow > Inflow)

Meadow Subsidy

June-Sept (acre-ft)

2012 13 18.6 6/26 2.6 2013 10 19.9 6/17 5.4 2014 11.9 13.4 6/9 15.2

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SLIDE 21

Year Snow Water Eq

May 1 (in)

Total Summer Inflow

June-Sept (acre-ft)

Crossover Date

(Outflow > Inflow)

Meadow Subsidy

June-Sept (acre-ft)

2012 13 18.6 6/26 2.6 2013 10 19.9 6/17 5.4 2014 11.9 13.4 6/9 15.2

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SLIDE 22

Year Snow Water Eq

May 1 (in)

Total Summer Inflow

June-Sept (acre-ft)

Crossover Date

(Outflow > Inflow)

Meadow Subsidy

June-Sept (acre-ft)

2012 13 18.6 6/26 2.6 2013 10 19.9 6/17 5.4 2014 11.9 13.4 6/9 15.2 2015

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SLIDE 23

Year Snow Water Eq

May 1 (in)

Total Summer Inflow

June-Sept (acre-ft)

Crossover Date

(Outflow > Inflow)

Meadow Subsidy

June-Sept (acre-ft)

2012 13 18.6 6/26 2.6 2013 10 19.9 6/17 5.4 2014 11.9 13.4 6/9 15.2 2015

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SLIDE 24

Year Snow Water Eq

May 1 (in)

2012 13 2013 10 2014 11.9 2015

9/4/2012 Pre-Project 8/15/15 9/10/15

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SLIDE 25

Groundwater Depth

well 1 well 3 well 4 well 5 well 6

2011 2012 2013 2014 2015 2016 Depth (ft) 2 4 6 2 4 6 Across Years Before After

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SLIDE 26

well 1 well 3 well 4 well 5 well 6

Jun Jul Aug Sept Oct

Groundwater Depth

well 1 well 3 well 4 well 5 well 6

2011 2012 2013 2014 2015 2016 Depth (ft) By Month 2 4 6 2 4 6 Across Years

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SLIDE 27

well 1 well 3 well 4 well 5 well 6

Jun Jul Aug Sept Oct By Month 2.1 ft 0.7 ft 0.2 ft 1.4 ft 0.7 ft Rise in Groundwater Level after Project

Groundwater Depth

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SLIDE 28

Depth

Coca-Cola Replenish Estimate

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SLIDE 29

Coca-Cola Replenish Estimate

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SLIDE 30

Depth/2 X Meadow Area

Coca-Cola Replenish Estimate

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SLIDE 31

Depth/2 X Meadow Area

Coca-Cola Replenish Estimate Replenish Volume = Depth/2 X Meadow Area X Specific Yield = 3 ft/2 X 500 ac X 0.33 = 225 acre ft

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Indian Valley 3.5 acres of pond X 3’ deep 15 acres of floodplain X 1.5’ 8 acres of floodplain X .7’ 15-20 acre feet

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SLIDE 33

25

50

75 100

Jan 2013 Apr Jul Oct Jan 2014

Year 1 Damage

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SLIDE 34

50 100 150 200 00:00 06:00 12:00 18:00

Flood 7/26/2013 Peak Flow: Upper Ga.= 100cfs Lower Ga.= 180cfs 1.5 hours > 20 cfs ~8,000 cuft of sediment in uppermost pond

Discharge (cfs)

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SLIDE 35

2013 2013

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2013 2013 2015

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SLIDE 38

2013 2015

Half-way through project reach

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SLIDE 39

2013 2015

Bottom of project

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Take homes:

  • 1. Meadow soaks up water in spring, releases in summer.
  • 2. Restoration increased summer outflows.
  • 3. Net effect spring-summer is to reduce volume.
  • 4. Groundwater elevated 1-2 feet. Narrow area affected.
  • 5. Greatly increased summer aquatic habitat --- pools vs dry
  • 6. Rapid sedimentation.
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Thanks! Chuck Loffland, Rick Hopson: USFS Alpine Watershed Group staff and volunteers Jim Wilcox and Terry Benoit: Plumas Corporation Austen Lorenz: San Francisco State Sierra Nevada Alliance Americorps Program Julie Fair, Max Odland: American Rivers NFWF, the CA LCC and Coca-Cola provided essential funding.