Figure 1 Field measurements for estimating bankfull values
Fieldwork measuring discharge in rivers and streams is popular at AS and A2. Bankfull refers to the flow of a river when it is just contained within the channel and banks. Once bankfull is exceeded, a river is in flood and water will spill over on to the floodplain. Bankfull discharges in river channels are important because:
■ they have an impact on river processes (moving sediment, erosion etc.)
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