Hydrology - Unit Hydrograph

The peak of flood hydrograph due to a 3-hour duration storm in a catchment is 180 m³/s. The total rainfall depth is 6.6 cm. It can be assumed that the average infiltration loss is 0.2 cm/h. There are no other losses. The...

The ordinates of a 1-hour unit hydrograph (UH) are given below. Time (hours): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 Ordinates of 1-hour UH (m³/s): 0, 13, 50, 80, 95, 85, 55, 35, 15, 10, 3, 0 These ordinates are used to de...

The ordinates of a one-hour unit hydrograph for a catchment are given below: | t (hour) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |---|---|---|---|---|---|---|---|---| | Q (m³/s) | 0 | 9 | 21 | 18 | 12 | 5 | 2 | 0 | Using the pr...

A two-hour duration storm event with uniform excess rainfall of 3 cm occurred on a watershed. The ordinates of streamflow hydrograph resulting from this event are given in the table. Time (hours) 0 1 2 3 4 5 6 7 Streamfl...

The ordinates, u, of a 2-hour unit hydrograph (i.e., for 1 cm of effective rain), for a catchment are shown in the table. A 6-hour storm occurs over the catchment such that the effective rainfall intensity is 1 cm/hour f...

The ordinates of a 2-hour unit hydrograph for a catchment are given as Time (h) 0 1 2 3 4 Ordinate (m³/s) 0 5 12 25 41 The ordinate (in m³/s) of a 4-hour unit hydrograph for this catchment at the time of 3 h would be ___...

An effective rainfall of 2-hour duration produced a flood hydrograph peak of 200 m³/s. The flood hydrograph has a base flow of 20 m³/s. If the spatial average rainfall in the watershed for the duration of storm is 2 cm a...