River Landform

Which of the following defines 'overland flow'?

• Highest water discharge in a stream

• Non-channel surface water flow

• Stream flow contributed by ground water

• Waterflow in a stream at maximum capacity

Which of the following features are associated with a trellis drainage pattern?

• Permeable rocks

• Homogeneous rocks

• Uplifted dome structure

• Alternating hard and soft rocks

If a river channel is 10m wide and 2m deep and has a velocity of 0.25m s^-1, what would be the discharge, in cumecs?

• 3

• 5

• 80

• 84

Calculate the hydraulic radius of the channel with a bed 9m wide and bank as deep as 6m

• 1.33m

• 2.57m

• 21.0m

• 54.0m

The ratio between the cross section of a river and the length of t=its wetted perimeter refers to its

• channel roughness

• channel slope

• hydraulic radius

• roughness coefficient

Which of the following processes would NOT be regarded as an output in the drainage basin?

• Runoff

• Infiltration

• Evaporation

• Transpiration

Select the process(es) which may NOT be associated with intereception?

• Drip-flow

• stem flow

• Through flow

Which of the following features are LIKELY to be formed when the velocity of the stream is suddenly reduced?

• Alluvial fans

• Point bars

• Incised meanders

The term 'stream order' identifies the

• arrangement of streams of different orders

• hierarchy of a drainage network

• number of channels in a drainage basin

• number of segments in a stream

In relation to storm hydrograph, which of the following factors will result in SHORTER lag time?

• High water table

• High infiltration capacity

• High interception by trees

• Rainfall of long duration