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(14 marks) QUESTION A4 a) The 0.5-hour unit hydrograph for a catchment is shown in Table 4: Table 4. Unit Hydrograph Tim
Posted: Wed May 04, 2022 8:38 am
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- 14 Marks Question A4 A The 0 5 Hour Unit Hydrograph For A Catchment Is Shown In Table 4 Table 4 Unit Hydrograph Tim 1 (56.73 KiB) Viewed 28 times
(14 marks) QUESTION A4 a) The 0.5-hour unit hydrograph for a catchment is shown in Table 4: Table 4. Unit Hydrograph Time (hours) UH ordinates (m³s¹) 0 0 0.5 40.4 1 234.4 1.5 250.6 2 146.0 2.5 38.0 3 17.0 3.5 0 Calculate the following: (i) Catchment area in km². [2 marks] (ii) S-hydrograph derived from this unit hydrograph. [4 marks] The 2-hour unit hydrograph. [4 marks] (iii) b) What would be the peak flow from a rainfall storm having excess rainfall at the rate of 10mm/hour for 10 hours for the catchment having the above unit hydrograph? [4 marks]