Geology Reference
In-Depth Information
224
III. Introduction to Water Resources and Contamination
5.
Do the data suggest that the greatest quantity of
hydrochloric acid is used in the vicinity of site 3 (Warren
area) or site 5 (Youngstown area)? Why?
7. The mean discharge at sites 1, 5, and 7 was 408, 673, and
809 cubic feet per second (cfs), respectively. On a date char-
acterized by the mean flow, the sulfate concentration at these
sites was 175,280, and 420 mg/L, respectively.
a.
What was the increase in sulfate load, in tons per day,
between sites 1 and 5, and 5 and 7? Use the equation: hood
(tons/day) = Q x C x 0.0027, where, Q = stream dis-
charge (cfs), C = concentration of contaminant (mg/L),
and 0.0027 = constant to convert seconds and mg/L to
days and tons.
6.
Considering the temperature data, would you expect the
dissolved oxygen content to be higher upstream from Warren
(sites 1, 2) or in and downstream from Youngstown (sites
5,6,7)? Why?
FIGURE 14.5 Water quality in the Mahoning River. Ranges of chloride concentrations (mg/L) for water types are:
1 = 20-35; 2 = 36-50; 3 = 51-65; 4 = 66-80.
FIGURE 14
.6
Water quality in the Mahoning River. pH ranges for water types are:
1 = 7.1-7.5; 2 = 6.6-7.0; 3 = 6.1-6.5: 4 = 5.5-6.0.
