Plateau Creek in Colorado carries 10 m3/s of water with a Selenium (Se) concentration of 0.003 mg/L. A farmer starts withdrawing 2 m3/s of the creek water to irrigate his land. During irrigation, the water picks up Se from the salts in the soil. One third of the irrigation water is lostto the ground and plants, and the other two-thirds is returned back to Plateau Creek. The irrigation run-off back to the creek contains 1.5 mg/L Se. Se is a conservative, non-reactive substance, and the stream does not pick up more Se from any other source. If the farmer irrigatescontinuously, what will be the steady-state concentration of Se in Plateau Creek, downstream from the farm (after the irrigation run-off returns to the Creek)?
Plateau Creek in Colorado carries 10 m3/s of water with a Selenium (Se) concentration of 0.003 mg/L. A farmer starts withdrawing 2 m3/s of the creek water to irrigate his land. During irrigation, the water picks up Se from the salts in the soil. One third of the irrigation water is lost
to the ground and plants, and the other two-thirds is returned back to Plateau Creek. The irrigation run-off back to the creek contains 1.5 mg/L Se. Se is a conservative, non-reactive substance, and the stream does not pick up more Se from any other source. If the farmer irrigates
continuously, what will be the steady-state concentration of Se in Plateau Creek, downstream from the farm (after the irrigation run-off returns to the Creek)?
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