• 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?

A culvert is designed for a flood frequency of 100 years and a useful life of 20 years. The risk involved in the design of the culvert is in percentage?

8.67 A 1/25 scale model of a spillway is tested. The discharge in the model is 0.1 m³/s. To what prototype discharge does this correspond? If it takes 1 min for a particle to float from one point to another in the model, how long would it take a similar particle to traverse the corresponding path in the prototype?

A culvert is designed for a flood magnitude of return period 100 years and has expected life of 20 years. The risk in this hydrologic design is

For spillways on small embankments designed for a limited life of 45 years, calculate the risk of exceeding the design flood of a return period a) 50 years b) 100 years. Comment on the calculated risks with respect to the return periods

A broad-crested emergency spillway with a width of 5m must be capable of movinga design discharge of 10m3 /s. Determine the height of water above the spillway in this situation.

A new bridge is being placed in a channel to accommodate a new development.  The existing concrete lined (n=0.013) rectangular channel is 49 feet wide with a flow depth of 14 feet and flowrate of 1,380 cfs.  A contraction needs to be placed to reduce the cost of installing a bridge over the channel.  What is the smallest possible contraction (width) that can occur so that the upstream flows do not overtop the channel

I need answer within 20 minutes please please with my best wishes

What is the peak flow from a watershed with 2 acres and runoff coefficient of 0.8, for a 25-year return storm over 30 min period using the Rational Method? (Use the IDF for Washington, DC)

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... × mum