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ROCKY RIVER WATERSHED
Is this watershed healthy or unhealthy? If it is unhealthy,
what are the main impairments?
By: Laura Hagy, Lydia Gray, and Elizabeth Chiu
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ROCKY RIVER FACTSLorain, Medina, Summit, and Cuyahoga counties (near Cleveland)Primary UsesCleveland-Hopkins International Airport
Golf CoursesUrban/Farming/Forest
Main impairment: Nutrient Enrichment
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MAIN THREATS
Population Growth
Waste Water Treatment
Storm Water Runoff
Development in Riparian Zone
Non –point source
Pollution
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ELIZABETH’S HYPOTHESIS
My hypothesis is that when the DO (Dissolved Oxygen) in the Rocky River
increases, the IBI (Index of Biotic Integrity) also increases.
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DO VS. IBI DATA1 4 7
10
13
16
19
22
25
28
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
AvIBIAv_DO
Av.I
BI
Av.
DO
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ELIZABETH’S CONCLUSIONData mostly supports hypothesisWhen DO increases, IBI increasesDissolved oxygen affects fish because they need oxygen to breathe Dissolved oxygen comes from temperature or rifflesAlgae can reduce oxygen levels
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LYDIA’S HYPOTHESIS As the QHEI (Qualitative Habitat
Evaluation Index) increases the IBI (Index of Biotic Integrity) will increase at the same rate.
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1 3 5 7 911
13
15
17
19
21
23
25
27
29
31
33
35
37
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
AvIBI
AvQHEI
Av.
QH
EI
Av.
IBI
QHEI vs. IBI
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LYDIA’S CONCLUSION My Hypothesis:
As the QHEI increases the IBI will increase at the same rate.
When a river has a rocky bottom, and lots of trees around it, you have happy fish, because:
Rocky bottom is breeding ground for fish and macroinvertebrates.
Trees keep pollutants and runoff from river.
Trees keep river cool= more oxygen.
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LAURA’S HYPOTHESISWhen the health of the substrate increases the ICI or macroinvertebrate community increases in numbers also.
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LAURA’S DATA ANALYSIS
0.0
5.0
10.0
15.0
20.0
25.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
MxSUBSTRATEMxICI
Mx.
Su
bstr
ate
Mx.
ICI
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LAURA’S CONCLUSIONData supports hypothesisSubstrate increases,
macroinvertebrates increaseSubstrate helps
macroinvertebratesSediments and silt reduce health
of substrate
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ACKNOWLEDGEMENTS
A great thanks to: Paula, Shannon, Steve, Leslie, and
both Katies Kim and Megan OSC,OSU, and YWSIOur sponsors AEP, Battelle, P&G,
and White Castle