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1. Water Budget and Streamflow Measurement (a) In hydrology applications, a water budget can be used by an engineer to manage the flow of water in and out of a water catchment area. Discuss in detail the application of water budget for a detention pond. [5 marks] (b) Streamflow data are recorded in Table Q1 for an open channel that is connected to a detention pond. Determine the discharge and mean velocity of the channel by using the mid-section method. [10 marks] Table Q1 for use in Question 1(b). Depth Distance from bank (m) (m) 0 0 2 2.5 5 3.5 8 3.5 12 4.8 15 4.8 18 4.2 21 3.4 23 2 24 0 Velocity (m/s) At 0.2 d At 0.8 d 0 0 4.0 3.5 5.3 4.4 6.3 5.4 6.5 5.9 6.6 6.0 5.8 5.2 5.5 4.4 4.2 3.2 0 0