Indian Valley Restoration and Water Luke Hunt Director of Headwaters Conservation American Rivers [email protected] Julie Fair, Max Odland: American Rivers Austen Lorenz: SF State University
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Indian Valley Restoration and Water Luke Hunt Director of Headwaters Conservation American Rivers [email protected]
Julie Fair, Max Odland: American Rivers Austen Lorenz: SF State University
Indian Valley 1. Flow 2. Groundwater 3. Damage and Recovery
Indian Valley 3.5 acres of pond 2.0 acres of fill 1.2 miles of channel
0
1
2
0 5 10 15
Lower Gauge
0
1
2 Upper Gauge
Discharge (cfs)
Stag
e (f
t)
0
1
2
0 5 10 15
Lower Gauge
0
1
2 Upper Gauge
Discharge (cfs)
Stag
e (f
t)
Discharge (cfs)
Stag
e (f
t)
0
1
2
3
4
0 50 100 150 200
Lower Gauge
0
1
2
3
4 Upper Gauge
0
25
50
75
100
Jan 2013 Apr Jul Oct Jan 2014
Dis
char
ge (
cfs)
Annual Flow
Upper Gauge
Lower Gauge
0
25
50
75
100
Jan 2013 Apr Jul Oct Jan 2014
Dis
char
ge (
cfs)
Annual Flow
Upper Gauge
Lower Gauge
0
5
10.0
Jun 01 Jul 01 Aug 1 Sep 01
Dis
char
ge (
cfs)
Summer Flow
Upper Gauge
Lower Gauge
0
5
10.0
Jun 01 Jul 01 Aug 1 Sep 01
Dis
char
ge (
cfs)
Summer Flow
Sink Source
Upper Gauge
Lower Gauge
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
Dis
char
ge (
cfs)
2012
( Before Project) 2013
(After Project)
2014
How Much? When?
-2
-1
0
1
2
-2
-1
0
1
2
Jul 01 Aug 01 Sep 01
Jul 01 Aug 01 Sep 01
Dis
char
ge (
cfs)
2012 ( Before Project)
2013 (After Project)
2014
Difference (Outflow – Inflow)
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
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
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
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
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 0
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 0
Year Snow Water Eq May 1 (in)
2012 13
2013 10
2014 11.9
2015 0
9/4/2012 Pre-Project
8/15/15 9/10/15
Groundwater Depth
well 1
w
ell 3
well 4
w
ell 5
well 6
2011 2012 2013 2014 2015 2016
Dep
th (
ft)
0
2
4
6
0
2
4
6
Across Years
Before After
well 1
w
ell 3
well 4
w
ell 5
well 6
Jun Jul Aug Sept Oct
Groundwater Depth
well 1
w
ell 3
well 4
w
ell 5
well 6
2011 2012 2013 2014 2015 2016
Dep
th (
ft)
By Month
0
2
4
6
0
2
4
6
Across Years
well 1
w
ell 3
well 4
w
ell 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
Depth
Coca-Cola Replenish Estimate
Coca-Cola Replenish Estimate
Depth/2 X Meadow Area
Coca-Cola Replenish Estimate
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
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
0
25
50
75
100
Jan 2013 Apr Jul Oct Jan 2014
Year 1 Damage
0
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
Dis
char
ge (
cfs)
2013 2013
2013 2013
2015
2013
2015
Half-way through project reach
2013
2015
Bottom of project
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.
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.
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