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![Page 1: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/1.jpg)
Interaction Between Rivers and Aquifer
Michael BarberDirector, State of Washington Water Research Center
Washington State University
May 8, 2007
Spokane Valley – Rathdrum Prairie Aquifer Study
![Page 2: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/2.jpg)
Surface/Groundwater Interaction Options
Dingman, S. Lawrence. 2002. Physical Hydrology 2nd Edition.
![Page 3: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/3.jpg)
Quantifying Aquifer/River Interaction
• This concepts explains why the total volume of the SVRP is not as important as the active portion – the part above the river bottom
• To determine gaining, losing and neutral reaches of surface/groundwater exchanges, additional Seepage Runs were conducted.
![Page 4: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/4.jpg)
QD
QC
QB
QA
Losing reach
QB < QA
Transitionalreach
QC ≈ QB
Gaining reach
QD > QC
river
aquifer
Nearly simultaneous measurement of river discharge (Q) at different locations (A, B, C, D) to determine streamflow gains and losses between sites.
ABCD
What are Seepage Runs?
![Page 5: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/5.jpg)
![Page 6: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/6.jpg)
Seepage Runs
• In addition to previous data, 2 seepage runs were conducted as part of this project– August 30, 2005– August 8, 2006
• The August 30th run was the most comprehensive
![Page 7: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/7.jpg)
nearPost Falls
near Coeurd’Alene Lake
near OtisOrchards
Greenacres
Flora Rd
Centennial Trail Bridge
below Greene St
below Upriver Dam
Spokane
below Meenach Bridge
RifleClubRdbelow
NineMileDam
at Dartford
Waikiki Road
near Dartford
near confluence
Sullivan Rd
Seepage Run Measurement SitesSpokane & Little Spokane Rivers
![Page 8: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/8.jpg)
-600
-400
-200
0
200
400
600
J I H G F E D C B A
Streamflow gain (+) or loss (-) in cfs
near Coeurd’Alene Lake
near Post Falls
near OtisOrchardsGreen
acresFloraRoad
CentennialTrail Bridge
Spokane
below GreeneStreet
Rifle ClubRoad
below NineMile Dam
Seepage Run, August 26-31, 2005
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-600
-400
-200
0
200
400
600
A B C
Streamflow gain (+) or loss (-) in cfs
Seepage Run, August 26-31, 2005Little Spokane River
at Dartford
Waikiki RdnearDartford
nearconfluence
![Page 10: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/10.jpg)
-600
-400
-200
0
200
400
600
A B C
Streamflow gain (+) or loss (-) in cfs
CentennialTrail Bridge
Spokane
below GreeneStreet
Limited Seepage Run, August 8, 2006
belowUpriver
Dam
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Spokane
at Dartford
near Dartford
nearPost Falls
near OtisOrchards
Monthly average gains and losses(next 3 slides)
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-1500
-1000
-500
0
500
1000
1500
1/1/00 12/31/00 1/1/02 1/1/03 1/1/04 12/31/04 1/1/06
Str
eam
flow
gai
n (+
) or
loss
(-)
in c
fs
Monthly average streamflow gain (+) or loss (-)Spokane River: near Post Falls – near Otis Orchards
This stream segment is: • always losing • loss is typically greater during winter and spring than summer and fall
2000 2002 2003 2004 20052001
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-1500
-1000
-500
0
500
1000
1500
1/1/00 12/31/00 1/1/02 1/1/03 1/1/04 12/31/04 1/1/06
Str
eam
flow
gai
n (+
) or
loss
(-)
in c
fs
Monthly average streamflow gain (+) or loss (-)Spokane River: near Post Falls – Spokane
This stream segment typically is: • gaining during period of lower streamflow (summer and fall) and • losing during periods of higher streamflow (winter and spring)
2000 2002 2003 2004 20052001
![Page 14: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/14.jpg)
-500
-400
-300
-200
-100
0
100
200
300
400
500
1/1/00 12/31/00 1/1/02 1/1/03 1/1/04 12/31/04 1/1/06
Str
eam
flow
gai
n (+
) or
loss
(-)
in c
fs
Monthly average streamflow gain (+) or loss (-)Little Spokane River: at Dartford – near Dartford
2000 2002 2003 2004 20052001
This stream segment is: • always gaining • gain is relatively constant over time
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Surface/Groundwater in MODFLOW
• Streamflow Routing Package– Segment to segment flow is determined– Spokane River
• River Package– Define stage, bottom elevation, & conductance– Little Spokane River
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Controlling Parameters
arrb hhm
LwKQ
Where:
K = Hydraulic conductivity of bed material [ft/day]
W = River width [ft]
L = Length of river segment [ft]
m = Thickness of bed deposits [ft]
hr = Elevation of river surface [ft]
ha = Groundwater elevation in cell adjacent to river [ft]
![Page 17: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/17.jpg)
11 Spokane River Zones
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Description of Zones
From To
KVSR-1: Coeur d’Alene Lake Post Falls
KVSR-2: Post Falls Otis Orchards
KVSR-3: Otis Orchards Greenacres
KVSR-4: Greenacres Sullivan Road
KVSR-5: Sullivan Road Myrtle Point
KVSR-6: Myrtle Point Upriver Dam
KVSR-7: Upriver Dam Downtown Spokane (E)
KVSR-8: Downtown Spokane (W) Above Meenach Bridge
KVSR-9: Above Meenach Bridge Rifle Club Road
KVSR-10: Rifle Club Road Nine Mile Dam
KVSR-11: Nine Mile Dam Long Lake
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Little Spokane River Connection
LSR Inflow Reach
![Page 20: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/20.jpg)
USGS gaging station on the Little Spokane River near Dartford
![Page 21: Interaction Between Rivers and Aquifer Michael Barber Director, State of Washington Water Research Center Washington State University May 8, 2007 Spokane.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf05503460f949bfb58/html5/thumbnails/21.jpg)
Little Spokane River Inflow
0
100
200
300
400
500
600
700
800
900
1000
1 2 3 4 5 6 7 8 9 10 11 12
Time (Jan-Dec)
Dis
ch
arg
e (
cfs
)
12431500 near Dartford - RM 3.8
12431000 @ Dartford - RM 11.4
Difference
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Any Questions?