The six-hour unit hydrograph of a watershed having a drainage area equal to 393 km? is as follows. For a storm over the watershed having excess rainfall of 5(x+1)cm for the first six hours and 15(x+1) cm for the second six hours, compute the streamflow hydrograph, assuming a constant baseflow of 100 m3 /s. (Let x be the last number of your student #) Time (h) Unit Hydrograph (m³/s*cm) 0 6 12 18 24 30 36 42 1.8 30.9 85.6 41.8 14.6 5.5 1.8

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Graphical Methods

The graphical method is a method of solving equations involving more than one variable using the Cartesian coordinate system. In civil engineering, the use of the graphical method is limited to the problems involving two variables. The graphical method has a great impact in solving the questions regarding engineering mechanics.