An engineer is attempting to estimate a) the hydraulic retention time (HRT), and b) the volume of a small lake. Using Br- as a conservative tracer, they very quicky adds NaBr from a boat in the middle of the lake and observes it to distribute almost instantly to a Br- concentration of 100 mg/L (precisely!). After 60 days, the concentration of Br- has dropped to 40 mg/l. What is the HRT in days? The outflow of the lake is measured by through the pipes in the dam that holds water in the lake. The total flow is 10,000 m3 /day. What is the volume of the lake?
An engineer is attempting to estimate a) the hydraulic retention time (HRT), and b) the volume of a small lake. Using Br- as a conservative tracer, they very quicky adds NaBr from a boat in the middle of the lake and observes it to distribute almost instantly to a Br- concentration of 100 mg/L (precisely!). After 60 days, the concentration of Br- has dropped to 40 mg/l. What is the HRT in days? The outflow of the lake is measured by through the pipes in the dam that holds water in the lake. The total flow is 10,000 m3 /day. What is the volume of the lake?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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An engineer is attempting to estimate a) the hydraulic retention time (HRT), and b) the volume of a small lake. Using Br- as a conservative tracer, they very quicky adds NaBr from a boat in the middle of the lake and observes it to distribute almost instantly to a Br- concentration of 100 mg/L (precisely!). After 60 days, the concentration of Br- has dropped to 40 mg/l.
What is the HRT in days?
The outflow of the lake is measured by through the pipes in the dam that holds water in the lake. The total flow is 10,000 m3 /day. What is the volume of the lake?
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