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CADDIS Volume 3: Examples & Applications

Worksheets: Little Scioto River, OH

Assemble Data from the Case

Table 3. Measurements relevant to each candidate cause.
Candidate cause Relevant measurements
1. Increased fine sediments Channel score, embeddedness subscore, siltation subscore
2. Altered pools and riffles Channel score, pool score, riffle score
3. Low dissolved oxygen Dissolved oxygen, biological oxygen demand of water, riffle score, channel score
4. Increased algal biomass Nitrate and nitrite concentrations in water, total phosphorus concentrations in water
5. Ammonia Toxicity Ammonia concentrations in water
6. Metal Toxicity Metal concentrations in sediments, water and fish tissue
7. PAH Toxicity PAH concentrations in sediments, bile metabolites in fish

Table 4. Summary of sampling locations for 1992 data collected in the Little Scioto River.
Sample medium Parameter Site designation and sample location (RM upstream from confluence with Scioto River) Number of samples per location
Upstream Site Site A Site B Downstream Sites
Fish IBI and Miwb metrics 9.2 7.9 6.5 5.7 4.4 2.7 0.3 2-3
Macroinvertebrates ICI Metrics 9.2 7.9 6.5 5.7 4.4 2.1 0.4 1
Sediment Volatile chemicals, semivolatile chemicals, metals and cyanide, PCBs and pesticides 9.5 7.9 6.5 5.8 4.4 2.7 0.4 1-3
Water Metals, phenolic compounds, ammonia, nitrates and nitrites (NO x), total phosphorus (P), and BOD 9.2 7.9 6.5 5.8 4.4 2.7 0.4 1
Water Dissolved oxygen 9.2 7.9 5.8 4.4 2.7 0.4 measured continuously
over 3 days
Physical Habitat QHEI metrics 9.2 7.9 6.5 5.7 4.4 2.7 0.3 1
Fish Tissue Pesticides, PCBs, metals, semivolatile compounds, and % lipid 9.2 6.5 2.7 2-5 composite samples
White Sucker Bile PAH metabolites 7.9 6.5 5.7 4.4 2.7 0.3 5-7


Table 5. Concentrations of chemicals in water. Units are in mg/L except where noted.
Chemical Up-stream Site Site A Site B Downstream sites (RM)
5.8 4.4 2.7 0.4
BOD 1 1 2.3 4.7 4.2 3.5 2.2
Nitrate and Nitrite 1.22 1.44 0.81 8.1 6.6 4.5 4.47
Ammonia ND ND 0.12 1.16 1.44 2.1 0.58
Total phosphorus 0.06 0.07 0.09 2.17 1.96 1.8 1.34

Dissolved oxygen

(minimum)

8.8

NA

5.7

2.8

NA

1.9

4.2

4.2

4.3

3.2

3.0

2.0

4.4

2.5
Coppera ND ND 15 ND ND ND ND
Leada ND ND 3 3 ND ND ND
Zinca ND ND ND 18 12 13 ND

a. Units are µg/L.
ND. Not Detected


Table 6. Selected physical habitat quality scores.
Parameter Up-stream Site Site A Site B Downstream sites (RM)
5.7 4.4 2.7 0.4
Substrate embeddedness a 2 1 1 1 1 1 1
Silt b 2 1 1 1 1 1 1
Channel c 17 10 10 10 10 10 7
Pool d 11 8 8 8 6 8 8
Riffle e 6 0 0 0 0 0 0

a. Levels of embeddedness were scored from most to least (1=extreme, 2=moderate, 3=low, 4=none)
b. Levels of silt were scored from most to least (1=heavy, 2=moderate, 3=normal, 4=free)
c. Channels were scored from high to low quality (20=high quality)
d. Pools were scored from high to low quality (12=high quality)
e. Riffles were scored from high to low quality (8=high quality)


Bile metabolites measured in white suckers from the Little Scioto River
Figure 6. Bile metabolites (μg/mg protein) measured in white suckers from the Little Scioto River. The grey horizontal line shows the upper limits of concentrations considered background for the state of Ohio. The number of fish sampled is shown above each bar. Vertical lines are standard errors. BAP = benzo[a]pyrene; NAPH= naphthalene. Source: Lin et al. (1996) and Cormier et al. (2000).

References

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