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?).
Reservoir and Streamflow Routing
In hydrology, a reservoir is usually a natural pond that is enlarged or made using a dam to keep the water clean. Reservoirs or dams can be constructed in several ways, including controlling the existing watercourse, disrupting the watercourse to form embayment within it, by digging or building any number of retaining walls.
Water Resource Systems Analysis
Water resources are natural water sources that may be as useful as water sources. 97% of the world's water is saltwater and only 3% is pure water; just over two-thirds of this ice sheet is located in glaciers. The remaining pure frozen water is found primarily as groundwater, with only a small fraction present above the ground or in the air. Natural sources of freshwater include surface water, under river flow, groundwater, and ice water. Artificial water sources can include treated wastewater (recycled water) and saline seawater.
hydrology engineering
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