What will be the steady-state concentration of selenium

Assignment Help Civil Engineering
Reference no: EM13544552

Plateau Creek carries 5.0 m^3/s of water with a selenium (SE) concentration of 0.0015 mg/L. a farmer starts withdrawing 1.0 m^3/ of the creek water to irrigate the land. During irrigation, the water picks up selenium from the salts of 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 run-off to the creek contain 1.00 mg/L of selenium. Selenium is a conservative, nonreactive substance, and the stream does not pick up more selenium from any other source.

a) 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)?

Reference no: EM13544552

Questions Cloud

Find the steady state concentration if the air in the box : Consider the air over a city to be a box 100km on a side that reaches up to an altitude of 1.0 km. The air is blowing into the box along one of its sides with a speed of 4 m/s
Determine the force p that must be applied to the cylinder : The brass tube AB (E=105 GPa) has a cross-sectional area of 140 mm^2 and is fitted with a plug at A. The tube is attached at B to a rigid plate that is itself attached at C to the bottom of an aluminum cylinder
Determine the required do concentration in the treatment : Given the following information, determine the required DO concentration in the treatment plant effluent discharge in order to ensure that at no point downstream the DO in the river drops below 4 mg/L:
Determine the required diameter of the thread : A nylon thread is to be subjected to a 10-N tension. Knowing that E=3.2 GPa, that the maximum allowable normal stress is 40 MPA, and that the length of the thread must not increase by more than 1%, determine the required diameter of the thread.
What will be the steady-state concentration of selenium : 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)?
Find the axial load and the total change in each cross : A flat bar of cross section 20mm by 70mm elongates 4.0mm in a length of 2.0m as a result of axial load. If the elastic modulus is 199x106 kN/m2 and Poisson's ratio is 0.25 for the material, find the axial load and the total change in each cross secti..
Determine magnitude and direction of resultant force : Calculate the area of the triangle - exponential functions using logarithms - Determine the magnitude and direction of the resultant force.
Determine the normal stresses induced in the steel and in : The concrete post (Ec=3.6*10^6 psi and Ac= 5.5*10^-6/degrees F) is reinforced with six steel bars. each of 7/8-in diameter (Es=29*10^6 psi and As=6.5*10-6/ degrees F).
Notch fracture toughness show your supportin calculations : A Charpy V Notch test was conducted for an ASTM A572 Grade 50 bridge steel. the average values of the test results at four different test temperatires were found to be

Reviews

Write a Review

Civil Engineering Questions & Answers

  Consider the process of baking potatoes in coventional oven

Consider the process of baking potatoes in coventional oven.Can the hot air in the oven be treated as a thermal energyreservoir? Explain

  How many moisture of aggregate will be needed

Base course aggregate has a target dry density 119.7 lb/cu ft in place. it will be laid down and compacted in a rectangular street repair area of 2000 ft x 48 ft x 6 in the aggregate in the stockpile contains 3.1% moisture.

  Determine the direction of the resultant force measured

If F_1=470N and theta=26 degrees, determine the magnitude of the resultant force of the three forces acting on ring A. Determine the direction of the resultant force measured counterclockwise from the positive x-axis.

  Determine the pressure in the tank indicated by strain gage

The cylindrical wall of the tank is 6mm thick, has a 600mm inside diameter, and is made of steel with E = 200 GPa and v = 0.30. Determine the pressure in the tank indicated by a strain gage reading of 280*10^-6 in/in.

  Find what are the monthly payments and the total interest

A 2014 Ford Mustand convertible in 'Gotta have it Green Metallic' is retailing for $38,000. If you put $3,500 down on the vehicle, and obtain approval for a 2.19% car loan compounded monthly for 5 years.

  A canal is constructed parallel to a river 460m away both

a canal is constructed parallel to a river 460m away both fully penetrating an unconfined aquifer of clean sand and

  Determine the normal depth and the froude number for q

A trapezoidal channel lined with d50 = 10 cm has a bottom width of b = 1.2 m, side slopes of m = 3, and a longitudinal bottom slope of S0 = 0.008. Determine the normal depth and the Froude number for Q = 1.4 m3/s.

  Determine what is the carts speed at point b

The cart takes 5.00s to go from point A to point C, and the cart takes 1.90s to go from point B to point C. What is the cart's speed at point B. Express answer numerically to three significant figures in feet per second.

  What are its density specific weight and specific gravity

The 10mm diameter rod is made of Kevlar 49. Determine the change in length and the change in diameter.

  What is the probability of a water shortage in this city

During the next month, the amount of water available for a city is lognormally distributed with a mean of 1 million gallons and a c.o.v. of 40%, where as the total demand is expected to follow a lognormal distribution with a mean of 1.5 million gallo..

  Formulate problem as an ip and find optimal solution

The Record-a-Song company has contracted with a rising star to record eight songs. The sizes in MB of the different songs are 8, 3, 5, 5, 9, 6, 7, and 12, respectively. Record-a-Song uses two CDs for recording. Each CD has a capacity of 30 MB.

  What is the maximum height the pump can be installed

A particular mixed flow pump is operating just below the point of cavitation. The pump is sited with its intake 3 m above the water level in the reservoir and delivers 0.05 m3/s.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd