• HW 3-A spillway is designed for a 100-year exceedance flood. What is the probability of the design flood occurring exactly twice in a 50-year period?
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- OTO 'T (1 • HW1// Route the flood hydrograph indicated below through a reservoir. The storage (elevation versus volume) data obtained from the reservoir survey are given. The spillway has the following characteristics: 1. Flow 3LH 3/2 2. Length = 70 ft 3. Crest height = 60 ft Hydrology • Flood Routing • Reservoir Routing • HW1// = t + ||| Prepared by Drab Al Amery Inflow Time (hr) Flow (cfs) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 0 600 2100 2500 1600 950 550 300 80 0 فلاتر O 4th year civil engineering class. Storage Date Elevation Storage (ft) prope (acre ft) 60 61 62 63 65 300 330 360 395 430 470 إضافة شرح... × mumQ3:- Design an overflow spillway section for a design discharge of 4820 m³/s. The upstream water surface level is at elevation 128m and the bed channel elevation is 100m. The spillway having a vertical U/s face with 100m long. Then what is the maximum discharge that can be passed over this spillway without cavitation. 0.50 0.48 0.46 Th CD 0.44 HD 0.42 P 0.40 Q=CD V28 LH2 0.38 1.5 2.0 2.5 P HD 0 0.5 1.0 3.0Task 3 a) Concern has been expressed at the local waste water treatment plant regarding the overflows caused by storm water being passed down the same pipeline. The town area main drain has to deal with a maximum of 100m³/s approximately twice a year and so it is proposed that a single drain pipe capable of taking this volume of water be collected from the main storm drains into a temporary storage reservoir to be channelled into the river. The maximum head available is 22m. The pipe is 2050m long, the Darcey Weisbach figure is 0.011, what is the minimum pipe diameter for this project? b) Looking into the future with mean temperature levels exceeding 2.5°C above pre-industrial levels it is considered that the maximum size of the water drain pipe would increase by 4m³/second every decade. Provide a table of expected maximum drain loads over a period from 2030 to 2130 and plot this on a graph. You are advised to plot the maximum expected rainfall against pipe diameter. c) (i) Explain…
- A pipe having a diameter of feet with roughness coefficient of 0.013 flows full. If the slope of the energy grade line is 0.0025 and the discharge is 11.32 cfs, what is the diameter of the pipe?Water is flowing in a rectangular channel having width 3.85 m and depth 0.86 m. Classify the type of flow if the discharge through the channel is 8.45 m³/s. A Sub Critical B Critical C Super critical D None of the aboveA hydraulic jump occurred at the end of spillway. The following site dimensions are given:- -The discharge of the structure (Q) = 950 m³/s - The width of the structure (B) = 50 m - Fr₂ = 0.21, AE = 18.2 m Find :- 1- y₁ and y2 (the before and after the jump) 2- what is the name of this jump. 3- choose a suitable one of the following U.S.B.R stilling basins for this jump and find all necessary dimensions.
- OTO t 2 • HW • 5-If a designer accepts a 5% chance of a flood control levee being overtopped in 25 years, what return period of flood should be used in the design? ||| = فلاتر O إضافة شرح... × mum1iii. Consider a small, temporary (3 year design life) flood mitigation dam designed to contain a 20 year flood event. What is the risk that it will be overtopped at least once in the design life.OTO t 1- The spillway of a dam has a service life of 75 years. A risk of 5% for the failure of the structure (exceeding of the flood capacity) has been considered acceptable. For what return period should the spillway capacity be designed? • Ans// 1460 years 2 ||| = فلاتر O إضافة شرح... × mum
- A tube 15m long is to connect two large tank whose difference in water level is 2m the tube is to carry 5L/s of fow. What minimum size of tube is necessary to assure laminar flow condition?Give me right solution You have designed a 16-in diameter stormwater pipe to flow at a velocity of 5 ft/s when full. The Manning’s roughness coefficient is 0.011. What material is most likely the pipe made of and what is the slope of the energy grade line?OTO t H.W.1/ Design the overflow-spillway having a vertical upstream face and a crest length of 260 ft. the design discharge is 76000 cfs. The upstream water surface at design discharge is at El. 1000 ft and the average channel floor is at El. 885 ft. the slop of downstream is 0.8H:1V, cd-2.2? Assume pointed pier, around abutment and No. of piers 3. Assume the pier width = 8 ft 2 = ||| فلاتر O × إضافة شرح... mum