A river catchment has a 2 hour unit hydrograph with the ordinates 0, 3, 11, 35, 55, 66, 63, 40, 22, 9 and 2 m/s. Assume that the base flow at time t=0 hour is 20 m/s and linearly increases to 44 m/s at t=24 hours. a) Compute the hydrograph resulting from two successive 2 hour periods of effective rain of 2.0 cm and 1.5 cm respectively. b) To prevent downstream flooding, the maximum flow to be released from the catchment is set at 180 m/s. Calculate the space needed to store the excess water from this event (in m?).

Describe the Procedures and equipment needed for obtaining water samples above the water table.

What are the applications and significants of jet of water impinging on solid flat and curved surfaces. Give real world civil engineering examples.

Explain and relate (as far as you can and to the best of your knowledge) if the turbidity data you get is the initial value of the turbidity of the water, how should the water be treated in the coagulation, flocculation, and precipitation according to the diagram on the side? Primary Secondary Chlorine disinfection tank Bar screen Grit chamber Settling tank Aeration tank Settling tank To river, lake, or ocean Raw sewage Sludge Activated sludge (kills bacteria) from sewers Air pump Sludge digester Disposed of in landfill or ocean or applied to cropland, pasture, or rangeland Sludge drying bed Brooks/Cole, Cengage Learning