Environmental Engineering Plateau Creek carries 5.0 m3/s of water with a selenium (Se) concentration of 0.0015mg/L. A farmer starts withdrawing 1.0m3/s of creek water to irrigate the land. During the irrigation, the water picks up selenium from the salts in the soil. One-half of the irrigation water is lost to the ground and plants, and the other half is returned to Plateau Creek. The irrigation runoff to the creek contains 1.00mg/L of selenium. Selenium is a conservative, nonreactive substance (it does not degrade in the stream), and the stream does not pick up more selenium from any other source. If the farmer irrigates continuously, what will be the steady-state concentration of selenium in the stream downstream from the farm (after the irrigation run-off returns to the stream)? Fish are sensitive to selenium levels over 0.04 mg/L. The farmer agrees not to use more water than will keep the stream selenium level below this ciritical concentration. How much water can the farmer withdraw from the stream to use for irrigation?
Environmental Engineering Plateau Creek carries 5.0 m3/s of water with a selenium (Se) concentration of 0.0015mg/L. A farmer starts withdrawing 1.0m3/s of creek water to irrigate the land. During the irrigation, the water picks up selenium from the salts in the soil. One-half of the irrigation water is lost to the ground and plants, and the other half is returned to Plateau Creek. The irrigation runoff to the creek contains 1.00mg/L of selenium. Selenium is a conservative, nonreactive substance (it does not degrade in the stream), and the stream does not pick up more selenium from any other source. If the farmer irrigates continuously, what will be the steady-state concentration of selenium in the stream downstream from the farm (after the irrigation run-off returns to the stream)? Fish are sensitive to selenium levels over 0.04 mg/L. The farmer agrees not to use more water than will keep the stream selenium level below this ciritical concentration. How much water can the farmer withdraw from the stream to use for irrigation?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Environmental Engineering
Plateau Creek carries 5.0 m3/s of water with a selenium (Se) concentration of 0.0015mg/L. A farmer starts withdrawing 1.0m3/s of creek water to irrigate the land. During the irrigation, the water picks up selenium from the salts in the soil. One-half of the irrigation water is lost to the ground and plants, and the other half is returned to Plateau Creek. The irrigation runoff to the creek contains 1.00mg/L of selenium. Selenium is a conservative, nonreactive substance (it does not degrade in the stream), and the stream does not pick up more selenium from any other source.
- If the farmer irrigates continuously, what will be the steady-state concentration of selenium in the stream downstream from the farm (after the irrigation run-off returns to the stream)?
- Fish are sensitive to selenium levels over 0.04 mg/L. The farmer agrees not to use more water than will keep the stream selenium level below this ciritical concentration. How much water can the farmer withdraw from the stream to use for irrigation?
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