a.) Considering an evaporation rate of 20 mm/m²/d from the PCD, determine if the river's sodium concentration downstream of the outlet exceeds the regulatory limit for sodium of 30 mg/l. Note: evaporated water does not contain sodium. b.) Briefly discuss two potential ways to reduce the concentration of sodium at the outlet of the PCD.
a.) Considering an evaporation rate of 20 mm/m²/d from the PCD, determine if the river's sodium concentration downstream of the outlet exceeds the regulatory limit for sodium of 30 mg/l. Note: evaporated water does not contain sodium. b.) Briefly discuss two potential ways to reduce the concentration of sodium at the outlet of the PCD.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![Groundwater ingress from a mine and contaminated water from an industrial plant is pumped into a pollution
control dam (PCD) with an area of 125 m? and a depth of 4 m. The water in the PCD has an outlet which pumps its
water into a nearby river. The groundwater is pumped at a rate of 5 m³/d and has a sodium concentration of 18
mg/l. The industrial water is pumped at a rate of 3 m³/d with an average concentration of 175 mg/l of sodium. The
river has a background sodium concentration of 3 mg/l and an average flow of 14 m3/d.
a.) Considering an evaporation rate of 20 mm/m?/d from the PCD, determine if the river's sodium concentration
downstream of the outlet exceeds the regulatory limit for sodium of 30 mg/l. Note: evaporated water does
not contain sodium.
b.) Briefly discuss two potential ways to reduce the concentration of sodium at the outlet of the PCD.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fffe81373-2e5a-45dc-b6be-87d3935ee3e5%2F06d4f304-c30a-4a3b-9841-98bd82ce41f6%2Fho3b4i_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Groundwater ingress from a mine and contaminated water from an industrial plant is pumped into a pollution
control dam (PCD) with an area of 125 m? and a depth of 4 m. The water in the PCD has an outlet which pumps its
water into a nearby river. The groundwater is pumped at a rate of 5 m³/d and has a sodium concentration of 18
mg/l. The industrial water is pumped at a rate of 3 m³/d with an average concentration of 175 mg/l of sodium. The
river has a background sodium concentration of 3 mg/l and an average flow of 14 m3/d.
a.) Considering an evaporation rate of 20 mm/m?/d from the PCD, determine if the river's sodium concentration
downstream of the outlet exceeds the regulatory limit for sodium of 30 mg/l. Note: evaporated water does
not contain sodium.
b.) Briefly discuss two potential ways to reduce the concentration of sodium at the outlet of the PCD.
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