River Test Review Practice
Name_______________________ Date___________________ Period_______
BMI-species
Stoneflies
Dobsonfly
True flies
Leeches
Caddisflies
Total number caught
15
2
12
4
10
PTV
1
0
6
10
2
total
1)
Calculate he biotic index (BI) number for the data collected would above (use the formula below to help you)
BMI1
T
X
PTV1
+
BMI2
T
X
PTV2
+
BMI3
T
X
PTV3
+
etc.
= BI
2) In what category of “goodness” does the biotic index number calculated in the previous question place the
Columbia River?
3) What does PTV stand for?
4) Caddisflies are normally found in _______________________.
a) Good quality water and are pollution intolerant.
b) Good quality water and are pollution tolerant.
c) Poor quality water and are pollution intolerant.
d) Poor quality water and are pollution tolerant.
5) Which of the following results from tests on the Mississippi River would suggest the river is healthy, when testing for
the presence of pH?
a) 14
b) 7.5
c) 5
d) 1
6) Which (choose more than one answer) of the following results from tests on the Mississippi River would suggest the
river is healthy, when testing for the presence of dissolved oxygen (DO)?
a) 7 mg/L
b) 4 mg/L
c) 90 % saturation ***technically both answers are “good” levels. It will be more straightforward on test.
d) 68 % saturation
7) Which of the following results from tests on the Columbia River would suggest the river is UNhealthy, when testing for
the presence of nitrates?
a) 0 mg/L
b) 2.5 mg/L
c) 7 mg/L
d) 14 mg/L
e) b, c & d are unhealthy
8) Which of the following results from tests on the Colorado River would suggest the river is healthy, when testing for the
presence of Biochemical Oxygen Demand (BOD)?
a) 100 % saturation
b) 11 mg/L
c) 4.5 mg/L
d) 0.45 mg/L
9) Which of the following results would be the WORST WQI value?
a) 0
b) 25
c) 67
d) 93
10) What does the BOD test actually measure? Be specific!
***Remember
that you are
not allowed
to make ANY
marks on the
charts or
graphs on the
test, so use
a straight
edge!
11) Given a test result of 5 mg/L, use the chart above to determine the Q-value for Biochemical Oxygen Demand.
12) Using the chart above, what test result would yield the ideal Q-value for BOD?
13) What kind of problems can too many nitrates in the river cause?
14) BMI stands for…
15) What does PFD stand for?
16) What’s a “strainer”?
17) What kind of water quality are Aquatic Earthworms normally found?
18) What kind of water quality are Stoneflies normally found?
19) What is a watershed?
20) Describe the following BMI feeding groups: (See page 95-96)
a) predatorsb) scrapersc) shreddersd) filterer collectorse) gathering collectors21) Which of the following would not affect the dissolved oxygen levels in the water?
a) The number of times a reading is taken
b) Time of day
c) Weather
d) How the sample is collected
e) Water temperature
22) If there is a decrease in DO levels, it is usually an indication of an increase in this type of pollution:
***Remember
that you are
not allowed
to make ANY
marks on the
charts or
graphs on the
test, so use
a straight
edge!
23) Use the chart above to find the dissolved oxygen (DO) saturation percentage given a water temperature of 12°C
and a DO concentration of 10 mg/L.
24) Using the chart above, and given a temperature of 15°C, what value for DO concentration in mg/L would yield the
ideal (highest) percent saturation (as close as you can get)?
25) Define POINT and NONPOINT pollution and give two examples of each.
PointNonpoint-
Test
26)Complete the following table.
Units
DO
Fecal Coliform
pH
BOD
Temperature
Total Phosphates
Nitrates
Turbidity
Total Solids
% saturation
Colonies/100 mL
Units
mg/L
∆C
mg/L
mg/L
NTU or Ft
mg/L
Q-value
75
85
83
94
90
8
97
61
87
Weighting
Factor
0.17
0.16
0.11
0.11
0.10
0.10
0.10
0.08
0.07
TOTAL
27) What is the total WQI and what is the rating?
28) Explain the difference between Bioaccumulation and Biomagnification.
• Bioaccumulation:
•
Biomagnification:
29) Draw a food web of animals/organisms in the Cedar River Watershed. Should have at least three levels and
included decomposers AND labels for autotrophs, heterotrophs, herbivores, and producers.