Scenario:As a Hydraulic Engineer you are required to design a dam to create a reservoir in Amman City, openchannel and pumps to convey water from the reservoir to a downstream community, and a pipenetwork to distribute the water within the community. Based on the hydrology assessment of thewatershed the dam height was set to 12 m above ground level, with a freeboard of 2m (water level inthe dam is 10m), dam width of 60m, and downstream flow was set at 8.5 m3/s (see Fig.1 below). Yourtask as an engineer is to provide a water supply for a planned community. Your project will involve (as a minimum): 10 m 12 mQ-8.5 mys60 mTop viewSide viewFig .1: Side and top of view of the proposed dam1. Provide preliminary dam design, A stable gravity dam cross-section must be designed in termsof sliding and overturning given that the coefficient of sheer resistance of the foundation soil is0.75, and the tailwater level of water converted into the channel directly behind the dam is 0.5m.Assuming an uplift force variation with no information about drainage (as a straight line from100% of the headwater pressure at the upstream face (heel) to 100% of the tailwater pressure atthe downstream face (toe) applied over 100% of the base area) and assuming usual conditionsonly.1.1 Provide a schematic diagram showing the forces imposed on the dam1.2 Determine the horizontal and vertical forces imposed on the dam body.1.3 Determine the dam weight needed to achieve a sliding factor of safety of 1.51.4 Determine the moments imposed at the dam toe.1.5 Determine the dam weight needed to achieve an overturning factor of safety of 2.1.6 Assuming that the dam downstream is with a slope of 1V/2H determine the dam base width tosatisfy the stability requirements1.7 At the dam bottom an emergency square gate (4mx4m) is placed to discharge water during floodevents, and it is supported by a hinge at the top. What would be the force needed to open the gate?2. Designing an open channel to convey the water to the two downstream communities where, thelevel of the two downstream communities relative to the dam bed is shown.2.1 Design an open channel using Manning equation. The channel should carry a flow rate of 8.5m'/s. Use the best hydraulic section approach to size the channel. It is concrete lined with a bed slopeof 0.001m/m, and a side slope of 2.2.2 Show a section of your designed channel with specified dimensions (use a proper drawing toscale).

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