The stormwater system of a given site includes the surface overland flow which exits by a rectangular concrete channel to (Manning‘s n = 0.015) drain it. The drainage channel is 100 m long, 20 cm wide, and has a longitudinal slope of 0.6%. The catchment surface of 1950 m2 has an average slope of 0.7%. The site surface is rough asphalt pavement (Manning‘s n = 0.020) and the distance from the upstream catchment boundary to the channel inlet is 100 m. The 25-yr design effective rainfall rate of 78.45 mm/h, which will produce an estimated channel flow rate of 0.034 m3 /s and channel water depth of 0.2 m.

Determine:

a) Estimate the time of concentration of the overland flow over the site using the kinematic wave approach.

b) Estimate the time of concentration from the open channel using the velocity approach and Manning’s equation.

c) Estimate the total time of concentration of the catchment

A 5 m wide rectangular channel carries a flow of 20 m³/s. The slope of the channel is 0.005 and the Manning’s n is 0.03. The flow encounters a 0.5 m step up that is 0.1 m long. The depths far upstream and downstream are normal.

1. Classify this channel
2. Qualitatively sketch this scenario, label gradually varied flow curves and provide appropriate depths.
3. Draw this scenario on an E-Y cycle graph, and label all depth changes.

1. What are green house gases? How do they impact the environment?

2. Which of the methods for concept generation, in your opinion, have a high probability of generating a good idea for a new product? Explain your answer.

3. How can the green engineering aspects be incorporated in product and tool design?

A Seven-sided closed field traverse has the following angles and distances in meters which were measured using a Total station:

AB = 51.7660;

BC = 76.9470;

CD = 37.0700;

DE = 29.2019;

EF = 28.7758;

FG = 36.7056;

GA = 41.9555;

The adjusted angles are as follows:

A = 128˚27’02”;

B = 101˚41’49”;

C = 102˚22’05”;

D = 143˚12’43”;

E = 161˚08’23”;

F = 131˚57’22”;

G = 131˚10’35”;

Given the Azimuth of AB is (160˚ 00' 00").

Compute the bearings or the azimuths of rest of the sides.

1. Compute the coordinates of the traverse stations using coordinates of station A as 1,000.000 N, 1,000.000 E.
2. Compute the area enclosed by the traverse using the co-ordinate method.
3. It was decided to divide the traverse into two parts AGFED and DCBA, find the area of each part and the length and direction of AD.

1. Write at least two sentences in your own words to explain the difference of using flexible boundary channel and the rigid boundary channel (based on the design considerations presented here).

2. Answer True or False and justify your answer:

    a. The rigid boundary channel is recommended for channels with very high velocities because it can easily resist the shear stress caused by the water flow.

    b. The trapezoidal cross section (with a value of m = 4 or more) is always more appropriate to be used instead of the rectangular channel in areas in which the neighboring land use restricts the channel top width.   

Both of the films you are discussing are: (Charlie Chaplin's Modern Times and René Clair’s A Nous La Liberté ).

1.) Both of these films depict the struggle between Labor and Capital within the context of industrialized production. In each film, explain what the issues of contention are between the two sides (the laborers and the wealthy capitalists), decide which side is favored by each of the two filmmakers and explain how those biases are revealed within each film, and then describe how each of these disputes gets resolved in the end. In your conclusion, draw comparisons and contrasts between the two films in the way they represent workers' rights and business owners' rights.

A Seven-sided closed field traverse has the following angles and distances in meters which were measured using a Total station:

AB = 51.7660;

BC = 76.9470;

CD = 37.0700;

DE = 29.2019;

EF = 28.7758;

FG = 36.7056;

GA = 41.9555;

The adjusted angles are as follows:

A = 128˚27’02”;

B = 101˚41’49”;

C = 102˚22’05”;

D = 143˚12’43”;

E = 161˚08’23”;

F = 131˚57’22”;

G = 131˚10’35”;

Given the Azimuth of AB is (160˚ 00' 00").

Compute the bearings or the azimuths of rest of the sides.

1. Compute the coordinates of the traverse stations using coordinates of station A as 1,000.000 N, 1,000.000 E.
2. Compute the area enclosed by the traverse using the co-ordinate method.
3. It was decided to divide the traverse into two parts AGFED and DCBA, find the area of each part and the length and direction of AD.

Determine the quantities of materials required per cubic yard to create a concrete mix. The specifications require a maximum size aggregate of 3/4 in., a minimum cement content of 6 sacks per cy, and a maximum water-cement ratio of 0.5. Assume 7% air voids. Consider the ratio of course aggregates to be 65% of the total aggregates by volume.

Please refer to the standard weights & densities (at the end of the test) for specific gravities and unit conversions.

what is truss profile and how to determine the pitch (rise ) ratio as well as panels and web members of the truss?

Can someone please assist me with the design of a 4.0m column, secured to a foundation at the bottom and fixed to 3 beams at the top. The loads are axial and at a magnitude of 1500kN total applied load. The design is based on Eurocode 2.

Code to be used when designing: Eurocode 2
concrete strength: C32
steel strength: 460
given dimensions for column: 300mm x 300mm

Determine the quantities of materials required per cubic yard to create a concrete mix. The specifications require a maximum size aggregate of 3/4 in., a minimum cement content of 6 sacks per cy, and a maximum water-cement ratio of 0.5. Assume 7% air voids. Consider the ratio of course aggregates to be 65% of the total aggregates by volume. Please refer to the standard weights & densities (at the end of the test) for specific gravities and unit conversions.

Discuss the important aspect of the IPD ( Integrated project delivery) in 1 page

civil construction engineering

PAGE 1 Table 11-1 Boat Specifications Spring 2020 Group_Project MET 405 - Economic Analysis for Engineering and Technology Total points: 100 Due Date: April 23, 2020 by 11:59 pm Project Case: Harbor Delivery Service (HDS) is an over the water delivery service operating in several large port/metropolitan areas. Each branch office has from 5 to 15 boats in its fleet. Currently, each branch office purchases its boats locally based on the branch manager’s preferences. This has resulted in each branch having a mix of brands and models and both diesel- and gasoline-powered units in some ports. Maintenance for this mixed fleet is a major headache, and costs seem out of control. To better utilize resources, the company has been repositioning boats to avoid unnecessary purchases and idle resources. This has been far from a resounding success, as the receiving locations are not prepared to maintain the boats if they differ from those it currently has. The branch managers inevitably find major faults with the boats transferred into their site. Additionally, this causes the sites to need both diesel and gasoline refueling facilities, with the inevitable confusion and mistakes. The various types and brands also make it difficult to create a “brand image.” HDS has decided to centralize procurement of boats and to standardize on brands and fuel types. The task of standardizing the fleet has been assigned to a team consisting of the chief operating officer and three branch managers. The team has identified the size and configuration of boat that best meets the general needs of HDS but have been unable to agree on a common power unit. A poll of the branch managers finds that five out of ten branch managers prefer the gasoline option due to its higher speed, while two out of ten are indifferent to the choice of power unit. Marketing has expressed a preference for diesel power units. They claim that the customers perceive diesel units as less flammable and support this preference with data that shows that insurance premiums are $500 more per year for gasoline-powered boats. Marketing cannot show that demand has been impacted by power unit choice. You have been tasked with recommending the appropriate power unit. To support this task, you have constructed the following table (Table 11-1) based on the specifications of the two boats under consideration. Gasoline Diesel Purchase price $76,586 $97,995 Engine size 350 hp 300 hp Average speed (manufacturer’s estimate) Knots (nautical mile per hour) 21.1 17.4 Fuel consumption (gallons per hour) 26 17 Fuel capacity (gallons) 300 300 PAGE 2 The boat manufacturer (the only difference in the two boats is the engine) has supplied an estimate of the average speed of each unit and the fuel consumption based on this average speed. Since the boats are used in harbors and for fairly short runs, the higher speed of the gasoline engine is valued at only $50 per day. When not in use, the gasoline engines will be turned off, while the diesel units would idle and burn fuel at the rate of 1 gal per hour. Both units are seen as adequate to meet the delivery schedules/requirements of HDS. Your investigations into maintenance costs have determined that the diesel unit requires $9000 in annual maintenance (mainly for the cooling system), while the gasoline engine unit has an annual cost of $6000. Oil changes are $25 for the gasoline unit and $57 for the diesel unit. Oil changes occur every 100 hours of engine use. Diesel is estimated to run $2.95 per gallon while gasoline runs $3.15 per gallon. The branch offices are located adjacent to a fueling/service dock ran by another business unit of HDS’s parent company. The boats are docked at the fueling facility overnight and each evening the tanks are topped off before the boats are turned over to the maintenance crew for service and cleaning. Thus, nightly refueling stops cost $15, but if refueling must be done during the day it costs $55. The units will typically cover 200 nautical miles in the course of the day. Crews are changed every six hours. The delivery service operates 18 hours per day 7 days a week. The diesel units, if purchased, will be kept in service for 4 years before being sold for $48,000 each. The gasoline units will be sold after 3 years of service for $38,000. HDS’s minimum attractive rate of return (MARR) is 18%. How many nautical miles per day must be traveled to change your recommendation?

A sand specimen is isotropically consolidated in a triaxial test apparatus to 420 kPa and then sheared with the drainage valves open (i.e., an S or CD test). At failure, (σ1 – σ3) is 1046 kPa. Determine the major and minor principal stresses at failure and the effective internal friction angle (assume c' = 0). Plot the Mohr diagram. (Problem originally from Holtz and Kovacs, 11-10)

Another specimen of the same sand as in Problem 1 (i.e., same f' and c') is tested in a direct shear apparatus under a normal pressure of 420 kPa. The sample fails when a shear stress of 280 kPa is reached. Determine the major and minor principal stresses at failure. Plot the Mohr diagram. (Problem originally from Holtz and Kovacs, 11-11)

1. A column with 7 m high and 397 mm X 488 mm masonry is built with 25.8 Mpa CMUs in M mortar, with four vertical bars, Fy = 414 MPa, placed in grout with the same strength of the CMUs.

   The column is designed to carry 1000 KN axial compression forces.

   a) Find the minimum steel reinforcement and the bars diameters

   As min = 0.0025 Ag,                          0.0025 An < As < .04 An

   b) Calculate the allowable axial load

   Pa=(0.25fm'An+0.65 As Fs) 1-h140 r2

   Fs=0.4 Fy   ≤24,000 psi 165.6 Mpa , As M13 = 129 mm2

2. c) Determine the required ties and the spacing
3. d) Is the column designed in 6-b can carry an axial compression load of 1200 KN, Explain?