Given a particular gravity dam profile with the following data, draw the profile, show the direction and location of all forces and quantify their magnitudes in diagram and tabular form. Data Height of the dam =63 m Free board =3 m U/S slope 0.2H:1 V Top width =10 m D/S slope 0.8H:1 V Seismic zone is moderate Height of U/S inclined face =20 m Wind velocity at the site =80Km/hr Total base width =54 m Tail water depth =10 m K h ​ =0.1,K v ​ =0.2 Expected depth of silt deposit =10 m Fetch distance of reservoir from dam site =40 m Location of uplift drainage from the heel of the dam =9 m.

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Example: Assume that Mina PLC, a financial analyst, is doing a consulting work for evaluating the two projects given below. The projects costs Br.500 million each and the required rate of return for each of the projects is 12%, the projects’ expected net cash flows are as follows: 1. Calculate each of the project’s payback, net present value(NPV) and Internal rate of return (IRR) 2. Which project or projects should be accepted if they are independent

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2.4 A 10,000-lb wheel load exerting contact pressure of 80 psi is applied on an elastic two-layer system, as shown in Figure P2.4. Layer 1 has elastic modulus 200,000 psi and thickness 8 in. Layer 2 has elastic modulus 10,000 psi. Both layers are incompressible, with Poisson ratio 0.5.Assuming that the loaded area is a single circle, determine the maximum surface deflec- tion, interface deflection, and interface stress. [Answer:0.025 in., 0.024 in, 11 psi] 10,000 lb 80 psi 0 E1-200,000 psi V10.5 8 in. E2-10,000 psi 2-0.5 FIGURE P2.4

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The per capita water demand of a small town having population census records indicated in Table 1, is given by 9 = 150 – 99.6 9.0 where, q = per capita demand [1/c/d] t is time in years starting from 1985. Table 1 Population census records Year 1985 1995 2005 Population 5000 7500 9480 Moreover, from historical water usage data the peaking factors for maximum day and peak hour water demands are estimated to be 175% and 250% of the average day demand, respectively. Determine a The design capacity of a treatment plant if it is to serve the town until the end of 2020. b. The design capacity of the distribution main Use the decreasing rate of increase method for population forecasting and assume a fire demand of 3 m/min.

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A city of 40000 residents has an average per capita water demand of 150 1/c/d. The average size of institutional and commercial areas is 200 ha and that of industrial areas is 100 ha. The expected unit water demands are 20 mº/ha/d for institutional and commercial areas, and 15 m/ha/d for industries. The public water demand and unaccounted for system losses are estimated to be 5 % and 15% of the total water demand, respectively. Calculate the total water demand, excluding fire flow.

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