1. 2 2008 shell creek watershed study advisors – mark seier & suzy goedeken researchers –...
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2008 Shell Creek Watershed Study
Advisors – Mark Seier & Suzy Goedeken
Researchers – Sheila O’Brien, Brett Roberg, Jessica Boschen, Sean Farrier, Ann O’Brien, Lynzee Pieke, Mandy Anderson, Alyshia Nelson, Jordan Nelson, Jesse Knust, Luke Gasper, Darrek Schmidt, Jonathon Dohmen, Tim Wiese, Olivia Wiese, Jake Kaufman, Katie O’Brien, Mark O’Brien, April Ramaekers, Aubrey Strong, Audrey Wondercheck, Greg Roberg
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(with Township-Range Labels)
Shell Creek and Loseke-Taylor Creek Watersheds
Lower Platte North Natural Resources District
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4
Site 1
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Site 2
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Site 3
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Site 4
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Site 6
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Site 5
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W.Q.I.
• The Water Quality Index was developed by the National Sanitation Foundation as a standard system to compare different bodies of water.
• To determine the WQI, a series of nine tests were performed. These tests were: dissolved oxygen, fecal coliform, pH, Biological Oxygen Demand (BOD), temperature, total phosphate, nitrates, turbidity, and total solids. We also did a water discharge test which we use to measure the flow of the creek in cubic feet per second.
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• After the tests are completed, the WQI for each section of the creek can be computed.
• To formulate the WQI, we first computed Q-values.
• We multiply this number by a weighting factor, which provides a measure of the relative importance of each test to overall water quality.
• The water quality index ranges from zero to 100.
- 0 - 25 is very bad - 25 - 50 is bad - 50 - 70 is medium - 70 - 90 is good- 90 - 100 is excellent
• The bio-indicator tests weren’t part of W.Q.I., but did give us a water quality rating.
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Sample W.Q.I. Curve Chart
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Sample W.Q.I. Form
Test Results Q-valueWeighting
FactorT o t a l
DO % sat. 0.17 Fecal Coliform col/100 mL 0.16
pH units 0.11 BOD mg/L 0.11
Temperature change in C 0.1 Total Phosphate mg/L 0.1
Nitrates mg/L 0.1 Turbidity JTU 0.08
Total Solids mg/L 0.07
Overall Water Quality Index ___
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2008 Precipitation
0
2
4
6
8
10
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May June July August
Inch
es
Rainfall
15
pH
6.3
6.6
6.9
7.2
7.5
7.8
8.1
8.4
June 3 June 17& 18
July 23&24
August 5
Date
pH
Level
Site 1Site 2Site 3Site 4Site 5Site 6
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Change in Water Temperature
-1
-0.5
0
0.5
1
1.5
2
2.5
June 3 June 17 &18
July 23 &24
August 5
Date
Degre
es
Celc
ius Site 1
Site 2Site 3Site 4Site 5Site 6
The higher the change, the worse the water quality.
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Total Solids
0
200
400
600
800
1000
1200
1400
1600
1800
June 3 June 17 &18
July 23 &24
August 5
Date
mg/L
Site 1Site 2Site 3Site 4Site 5Site 6
The higher the concentration, the worse the water quality.
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Fecal Coliform
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Fecal Coliform
0
200
400
600
800
1000
1200
1400
June 3 June 17 &18
July 23 &24
August 5
Date
colo
nie
s/100 m
L Site 1Site 2Site 3Site 4Site 5Site 6
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Flow
0
10
20
30
40
50
60
70
80
90
June 3 June 17 &18
July 23 &24
August 5
Date
Cubic
feet
per
seco
nd
Site 1Site 2Site 3Site 4Site 5Site 6
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Turbidity
0
50
100
150
200
250
300
350
400
450
500
June 3 June 17 &18
July 23 &24
August 5
Date
JTU
's
Site 1Site 2Site 3Site 4Site 5Site 6
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Dissolved Oxygen
0
10
20
30
40
50
60
70
80
90
100
June 3 June 17 &18
July 23 &24
August 5
Date
% S
atu
rati
on Site 1
Site 2Site 3Site 4Site 5Site 6
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5 Day Biological Oxygen Demand
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
June 3 June 17 &18
July 23 &24
August 5
Date
ppm
Site 1Site 2Site 3Site 4Site 5Site 6
The higher the change, the worse the water quality.
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Nitrates
0
10
20
30
40
50
60
70
June 3 June 17 &18
July 23 &24
August 5
Date
ppm
Site 1Site 2Site 3Site 4Site 5Site 6
25
Phosphates
0
0.5
1
1.5
2
2.5
June 3 June 17&18
July 23 &24
August 5
Date
ppm
Site 1Site 2Site 3Site 4Site 5Site 6
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WQI Averages by Site
45
50
55
60
65
70
Site 1 Site 2 Site 3 Site 4 Site 6 Site 5
WQ
I
2003 Averages 2004 Averages 2005 Averages
2006 Averages 2007 Averages 2008 Averages
Medium
Bad
Good
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WQI Averages by Date
45
50
55
60
65
70
May June July August
Month
WQ
I
2003 Averages 2004 Averages 2005 Averages
2006 Averages 2007 Averages 2008 Averages
Bad
Medium
Good
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2003 - 2008 Chemical Test Average Comparisons
0
5
10
15
20
25
30
Disch
arge pH
Nitrat
es
Phosphat
es
B.O.D
.
Change
in T
emp.
Chemical Test
2003 Averages
2004 Averages
2005 Averages
2006 Averages
2007 Averages
2008 Averages
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2003 - 2008 Chemical Test Average Comparisons
0
200
400
600
800
1000
1200
D.O. % Sat. Turbidity Fecal Coliform Total Solids
Chemical Test
2003 Averages
2004 Averages
2005 Averages
2006 Averages
2007 Averages
2008 Averages
*2006 Fecal Coliform Average 8,058 col/100 mL
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Macro Invertebrates
TolerantSomewhat Sensitive
Sensitive
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Sample Bio-Indicator Data Form
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Beaver-Shell Creek WQI Comparison
0
10
20
30
40
50
60
70
WQI
EarlyJune
July SummerAverage
Beaver CreekAverage WQIShell CreekAverage WQI
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Beaver-Shell Creek Comparison
0
5
10
15
20
25
30
pH Nitrates Phosphates B.O.D
Shell CreekBeaver Creek
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Beaver-Shell Creek Comparison
0
100
200
300
400
500
600
700
800
Turbidity FecalColiform
Total Solids D.O. % Sat.
Shell CreekBeaver Creek
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2008 Flood Study
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2008 Flood StudyDate and Time
Width (ft)
Avg. Depth (ft)
Flow (cfs)
Total Solids(mg/L)
SolidDischarge (lbs/min)
SolidDischarge (tons/hr)
5/30/07 110 8.42 2243 9300 78145 2344
6/8/08 130 8.98 4328 8950 145138 4354
X cu ft
60 sec
28.32 L X mg 1 g 1 lb 1 ton 60 min
1 sec 1 min 1 cu ft 1 L 100 mg 453.6 g 2000 lb 1 hr
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Watery
Testing
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Chemical
Tests
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Website
• http://newman.esu8.org/project.html
OR• http://newman.esu8.org/
• Click “Our Students”• Click “Student Projects”
• Click “Watershed Project”• You can see our data and further information concerning this project,
including pictures.
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Thank You To:• Lower Platte North Natural Resource District
• PrairieLand RC&D
• Natural Resource Conservation Service
• Nebraska Department of Environmental Quality
• Shell Creek Watershed Improvement Group
• Chris Poole
• Phil Chvala
• Area Land Owners
The End