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To avoid the salinization of soil in a farming area, parallel drainage canals are to be installed to maintain the water table at a depth of at least 4m below the ground surface. It is thought that no evapo-transpiration would occur below that depth. This water table aquifer has hydraulic conductivity of 1.5 m/day. The canals fully penetrate the aquifer and have a stage of 3m. The design depth from the ground surface to the bottom of the canal is 10 m. The daily recharge from precipitation and irrigation to the aquifer is 0.019 m. What is the optimal distance between the two drainage canals to achieve the desired water table control? What is the discharge rate per unit width of the aquifer to the canals?
A radar device is installed at a location on the roadside to measure instantaneous speeds of vehicles passing that location. The initial four vehicles' speeds are listed. Calculate the space-mean speed of these four vehicles.
Effective stress is defined as the overburden soil pressure less the buoyancy effect of water. What is the effective stress 20 feet deep if the specific weight of the dry soil is 113 pcf and the water table is 11 feet deep
What reaction should we consider superinposed. Also what is this structures indeterminancy.
A small blimp is temporarily moored wherein DC and the centerline of AB are coplanar. A force F from wind, weight, and buoyancy is shown acting at the centerline of the blimp. If F = 5i+ 10 j + 18 k kN
A trapezoidal channel is carrying water at a normal depth of 5.2 ft, the channel has a bottom width of 10 ft and side slopes of 2 H to 1 V. It is running on a slope of 0.005 ft/ft. What will be the shear stress in lb/ft^2 exerted on the channel be..
Four liters of water are equilibrated with a gas mixture containing carbon dioxide at a partial pressure of 0.3 atm. Henry's law constant for H2CO3* solubility is 2.0g/L-atm.
Water enters a very wide rectangular channel (Manning's n = 0.0149) at a velocity of 12.2 ms-1 and a depth of 0.61 m. An H3 curve forms downstream and the water jumps to a depth of 2.4 m some distance downstream.
Given the following data for a vertical curve of a road; G1=-2.5%, G2=+5.5% and station of PVI=250+50.At station 252+50, the vertical curve must intersect an existing road at elevation 48.48ft. the elevation on the tangent section at station 256+5..
Assume the earth is a sphere with a radius of 6,371,000.000 meters. Three points are defined by their latitude and longitude. Point Latitude (N) Longitude (W) A 40° 25' 48.67" 86° 54' 54.00" B 40° 25' 47.00" 86° 54' 54.00" Purdue CE C 40° 25' 47.0..
determine the minimum length of a 5/16 inch, side fillet weld that will be necessary if the plate is subjected to an axial stress of 20 ksi . use an allowable shearing stress through the throat of the weld of 21 ksi.
The wet bulb and dry bulb temperatures for humid atmospheric air (at 100 kPa) are measured to be 20 C and 25C respectively. Determine: a. using the psychrometric chart, the relative humidity b. using the psychrometric chart, the humidity ratio
(a) Determine the magnitude of the projected components of F acting parallel Fp and normal Fn to line OA. (b) Express these components Fp and Fn in Cartesian vector notation.
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