Using the regime-theory method, design a channel to carry wastewater from a manufacturing plant. Assume a design discharge of 950 ft3/s.950 ft3/s. The channel will have a sand bed and banks. Use a Manning’s roughness coefficient of 0.025.

Assume: Water Temp = 60°F, slope = 0.25%

A clean sand deposit has a total unit weight gabove the groundwater table of

18.9 kN/m3and a submerged unit weight of 9.84 kN/m3. The groundwater table

is located 1.5 m below ground surface. Standard penetration tests were

performed at 3 m below the ground surface with a blow count of 3 blows for

the first 150mm, 4 blows for the second 150mm and 5 blows for the third

150mm. Estimate the shear wave velocity of the sand at 3 m below the ground

surface. If a cone penetration test was performed at 3m below the ground

surface and the cone tip resistance was 3.9 MPa, estimate the shear wave velocity.

Compare the values obtained from both approaches.

(a) A snow sample 20 cm high melted into 3 cm of water. What was the density of the snow sample?
(b) What is the water equivalent of snow accumulation measuring 9 inches with a density of 8%?
(c) Compute the overall snow-water equivalent for a watershed for which following elevation-area-snow-water-
equivalents have been measured.

Elevation (m) 2000 2500 3000 3500 4000
Cumulative area (km2) 0 255 432 519 605
Snow-water equivalent (mm) 0 0 8 22 30

Hi I need Stress Strain Graphs to be made for the following data tables. There should be 3 graphs, one for each table. I also need to know what material each sample is made of. I assume this is calculated from calculating the Modulus of Elasticity E. However I do not really know. I appreciate everything. There is an image of the tables as well as the data itself below this post.

Include the Following

• Stress Strain graphs for each sample showing what variable and unit you have on both axes, and stating if it is sample 1, 2 or 3. Show the points in the graph and additionally a trendline.
• Explain how you got your conclusion (i.e., show your work) including how it was calculated/how you got it, what value it had and what you compared with.
• Your conclusion of what each of the three samples are made of.  

During the construction phase of a health-care project, delays not attributed to the

contractor were experienced, but the contractor was delayed in submitting all delay

information required by the contract until 7 days before the contractual completion date,

can the architect issue an extension of time prior to the completion date? Explain.

The city of Stillwater is planning to install a new settling tank as an upgrade to their existing water treat plant. You run a batch settling test using a 2.0 m column and coagulated water from their existing tank and collect the following data (Table 1). Using this data, design a settling tank to remove 65% of the influent suspended solids. Assume a design flow of 0.5 m³/s. Use scale up factors of 0.65 for overflow rate and 1.75 for detention time (Eckenfelder 1980). Discuss your results.

Table 1. Percent suspended solids removal as a function of time and depth.

What is the purpose of a throttling valve? What are the implications of having a throttling valve prior to the pump inlet? Explain in terms of NPSH.

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A process to remove contaminant A includes two independent pipes flowing into a cylindrical reactor, and a single outlet port. The reactor has a diameter of 2.8 m and a height of 2 m. The flow in the larger of the inlet pipes is 2.5 m3/s and contains 50 μg/L of A. The smaller pipe also carries contaminant A at a rate of 5x104 μg/s. Under these conditions, the reactor’s outlet flow is 3.25 m3/s. Assuming that the removal of contaminant A follows first-order kinetics (k = 0.35 s-1): a) Sketch the described process and write a mass-balance equation for contaminant A around the entire control volume assuming the reactor behaves as an ideal CSTR. Calculate the steady-state concentration of A in the reactor, in μg/L. Answer: C=23.2 µg/m3 b) Calculate the flow and concentration of A in the smaller pipe, in m3/s and μg/L, respectively. c) If the smaller pipe inlet valve is suddenly closed so that its flow into the reactor is completely stopped, what is the new steady-state concentration of A in the reactor, in μg/L? Answer: C =18.4 µg/m3 d) How long does it take the contaminant A concentration to regain steady-state condition after this change? Express answer in seconds. Answer: t = 53.8 s

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