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sveta [45]
3 years ago
5

04-9 (ML 6.12) A pristine stream flowing at 100 cubic feet per second (cfs) in the Rocky Mountains contains 5 mg/L of suspended

solids (SS). During the spring, ice melt conveys an additional 250 mg/L of TSS at a rate of 20 cfs into the stream. Determine the concentration of TSS in the stream during the spring. (Hint: Treat the ice melt as a secondary stream added to the first.) Answer: 46 mg/L
Physics
1 answer:
timurjin [86]3 years ago
4 0

Answer:

C_{mix} = 45.833 mg/l

Explanation:

Give data:

flow rate of stream is Q_1 100 cfs

concentration of suspended solids SS_1 5 mg/L

During spring time,

concentration of TSS = SS_2 = 250 mg/l

flow rate of stream Q_2= 20 cfs

we know that, concentration of mix is given as

C_{mix} = \frac{Q_1 SS_1 +  Q_2 SS_2}{Q_1 +Q_2}

C_{mix} = \frac{100\times 5 + 20\times 250}{100+20}

C_{mix} = 45.833 mg/l

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