Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A gauging structure is to be built across an artificial drainage channel in order to measure discharges. Designers have settled on a contracted sharp crested rectangular weir. The channel cross section is trapezoidal in shape, with a bed width of 3m and side slopes of 1 Vertical to 3 Horizontal. The bed and wall of the channel is covered with grass with an estimated Manning's n of 0.045. Along the length of the channel the bed drops by an average of 2.5 metres every kilometre. Historic accounts indicate that the maximum flow of water in the channel prior to the construction of the gauging structure was 1.4 m. As the channel cross section is relatively consistent over its length we can assume that in the absence of the gauging structure that water flows at normal depth. The general equation for flow over a weir is given by:
d ideal Q = C ×Q
Where Q is the actual flow rate, Qideal is the discharge estimated from conservation of energy principles and Cd is an experimentally derived coefficient which is dependent on the shape of the weir and the depth of water flow. In the calculations for flow over the weir you are instructed to account for the approach velocity to calculate the value of Qideal. In order to measure discharge an ultrasonic senor is to be located just upstream of the weir. The selected sensor has a maximum range of 1m, i.e. (max reading) - (min reading) = 1.0m
Weir Design Criteria:
To avoid submergence the crest of the weir must be at least 0.05 m above the downstream water depth. Here we can assume that the depth downstream is equal to the normal depth. To simplify calculations we will assume that Cd = 0.7 Water depth over the weir will be restricted by the range of the sensor.
Tasks:
a) Design the weir structure in order to accommodate the design max flow and maximise the use of the electronic sensor. Design variables include weir width and height of crest above the bed.
b) Use the direct step method to determine water profile upstream of the weir as a result of the weir. Plot the longitudinal bed, water surface and energy profiles over the length of this profile.
Determine the effective size as well as the uniformity coefficient and coefficient of curvature for each soil. Determine also the percentages of gravel, sand, silt, and clay according to (a) ASTM, (b) AASHTO, (c)USCS, and (d) the British Standard.
A four-lane urban freeway (two lanes in each direction) is located on rolling terrain and has 12-ft lanes, no lateral obstructions within 6 ft of the pavement edges, and an interchange every 2 miles.
The suspended load exerts a force F = 600 lb at A and bar OA weighs 200 lb. Assume that the bar's weight acts at its midpoint. Determine the tensions in the cables and the reactions at the ball and socket support O.
consider the cantilever beam-mass system. formulate and solve the minimum weight design.
Determine the transformed moment of inertia for the beam using steel as the reference material. Express your answer in in^4 to the nearest 0.1 in^4.
A 32000 lb airplane lands on an aircraft carrier and is caught by an arresting cable. The cable is inextensible and is paid out at A and B from mechanisms located below deck and consisting of pistons moving in long oil-filled cylinders.
A separate hopper-bottomed grit storage tank has a usable volume of 3 cubic yards. Compute the detention time in the aerated unit and the estimated length of time required to fill the storage tank with grit.
Assume a hydrostatic condition in a cubic tank with 64ft length, 32ft width and 16ft height. The tank is filled with 15ppg( pounds per gallon) fluid. Calculate the pressure in psignat the bottom of the tank.
Twenty years of annual maximum rainfall depths are given below. Determine the rainfall depths to be used for storm structure design for the following annual return periods: 2, 5, 10, 25, 50, & 100 year.
A developer wants to provide access to a new building from a driveway placed 1000 ft upstream of a busy intersection. He is concerned that queues developing during the red phase of the signal at the intersection will block access.
A tracer study was conducted to assess groundwater velocity and showed that a slug of a conservative tracer took 34 days to travel the 10-m distance between two wells.
Calculate the length of 10 equal-sized aeration basins for secondary treatment of a wastewater flow of 10 MGD with 20,000 lb of BOD per day for a conventional activated sludge process with a maximum loading of 40 lb BOD/ 1000 ft3*d.
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd