5. Compare the hydraulic detention times for an ideal CMFR at steady state, with and without flow recycle as shown in the image below: Q, Co Q, Co Q, C Q, C Without flow recycle q, C With flow recycle The rate of reaction is the same in both scenarios with dC/dt% D-kC, where C is contaminant concentration. Hint: Use mass balance equation
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A: The given figure is shown below:
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- Direction: Choose A- When both statements are true; B - When both statements are false; C- When the first statement is true and the second statement is false; D- When the first statement is false and the second statement is true. First Statement: The piezometric surface of an aquifer confined by an aquiclude is higher than that of an unconfined. Second Statement: Hydraulic conductivity is a measure of permeability or impermeability of a geologic unit. OA B. D.(a) A stratified aquifer has a total thickness of 30 m and is made up of three layers. The top layer has a coefficient of permeability of 20 m/day and a thickness of 12.0 m. The middle and bottom layers have permeability of 15 m/day and 20 m/day respectively and are of equal thickness. Calculate the following:Don't copy from other solutions thank you. Three piezometers have been installed in the confined aquifer having a uniform thickness of 4.6 m. and hydraulic conductivity of 2 x 104 m/s. a) Compute the hydraulic grądient. b) Compute the transmissivity in m2/day. c) Compute the flow rate per unit width of the aquifer in liters/day.
- 3.1 Construct IPR of a vertical well in an oil reservoir. Consider (1) transient flow at 1 month, (2) steady-state flow, and (3) pseudo-steady-state flow. The following data are given: Porosity, o = 0.25 Effective horizontal permeability, k = 10 md Pay zone thickness, h = 50 ft Reservoir pressure, pe or p = 5,000 psia Bubble point pressure, p, = 100 psia Fluid formation volume factor, B, = 1.2 Fluid viscosity, M. = 1.5 cp Total compressibility, c, = 0.0000125 psi- Drainage area, A = 640 acres (re = 2,980 ft) Wellbore radius, rw Skin factor, S = 5 0.328 ftNeed help with C. 8. An aquifer has a hydraulic conductivity of 12 ft/d and an effective porosity of 17% and is under a hydraulic gradient of 0.0055. (A) Compute the specific discharge. (B) Compute the average linear velocity. (C) The water temperature is 14°C and the mean pore diameter is 0.33 mm. Is it permissible to use Darcy's law under these circumstances? What is the reason for your answer?B. Under certain conditions the Thiem equation (5-43) for confined aquifers, is equivalent to the Cooper-Jacob equation (5-58) for confined aquifers. What are the conditions? (This exercise is easier than Problem A.) C. If an analysis is made of the hydraulic conductivity of a site using permeameter tests of core samples, slug tests of monitoring wells, and pumping tests of production wells, it is often observed that the hydraulic conductivity as measured by each method is different. Which method would be most likely to have the greatest hydraulic conductivity, and which the least? What are some possible reasons why this would be true?
- 1. In a system with 4 reservoirs and 1 pipe junctions, how many hydraulic headloss equations are formulate? A. 3B. 2C. 1D. 4E. 5 2. In turbulent flow, which is correct?BJ: higher Re value has lower friction factorJB: lower Re value has lower friction factorGroup of answer choices A. BJ is true and JB is false B. BJ is true and JB is true C. BJ is false and JB is false D. BJ is false and JB is true 3.which of the following is always the same for horizontal closed conduit? A. Total headB. Velocity headC. Elevation headD. Pressure headCORRECT LETTER PLS 1. In a system with 4 reservoirs and 1 pipe junctions, how many hydraulic headloss equations are formulate? A. 3B. 2C. 1D. 4E. 5 2. In turbulent flow, which is correct?BJ: higher Re value has lower friction factorJB: lower Re value has lower friction factorGroup of answer choices A. BJ is true and JB is false B. BJ is true and JB is true C. BJ is false and JB is false D. BJ is false and JB is true 3.which of the following is always the same for horizontal closed conduit? A. Total headB. Velocity headC. Elevation headD. Pressure headP 4: A sand sample of 35cm2 cross sectional area and 20cm long was tested in a constant head permeameter. Under a head of 60cm, the discharge was 120ml in 6min. The dry weight of sand used for the test was 1120g, and G3=2.68. Determine (a) the hydraulic conductivity in cm/s, (b) the discharge velocity, and (c) the seepage velocity. Answers: a) 3.174 x 103 cm/s, b) 9.52 x 10³ cm/s, c) 2.36 x 10-² cm/s
- Problem (4) The following results have been reported for field pumping test from a well, where the top permeable layer is unconfined and underlain by an impermeable layer, for a steady state condition: m3 q = 0.68 min h, = 5.6m at r, = 60m h, = 5m at r, = 30m Calculate the hydraulic conductivity (cm/s) of the permeable layer.Figure Q1 shows an internal piping system of a building. The pipe is uPVC of total length 35 m. The minor loss coefficients are as shown in the figure. The flow velocity in the pipe is designed to be 1.0 m/s and the residual pressure head at appliance X must be at least 0.8m. Determine the required pipe diameter using Darcy Weisbach formula. Level 8.5 m k = 0.8 Water tank IT Roof beam Minor loss coefficients: E Stop valve, k = 10 O 90°elbow, k = 1 Level 4 m Figure Q12):(A): Derive the basic differential equation of Terzaghi's one dimensional consolidation theory for saturated soils. (B): For the concrete dam shown in figure below. The water heads are 16 m on the upstream side and 2 m on the downstream side. 1- Calculate the seepage loss through the subsoil per unit length if the average value of the hydraulic conductivity is (6x10³ cm/sec) horizontally and (3x10 cm/sec) vertically. 2- Calculate the exit gradient if the average length of the last square is 0.9 m. XXX Impervious Dam Permeable Xxxxx