Some geography students investigated how river channel characteristics change downstream at three different sites along the River Severn.
Figure 7a: River channel fieldwork recording sheet
| Site | Distance from source (km) | Bedload size (longest axis in cm) | River velocity (seconds to travel 10m) |
|---|---|---|---|
| 1 | 2.4 | ||
| 2 | 8.1 | ||
| 3 | 15.3 |
Identify three pieces of fieldwork equipment that the students would need to collect the primary data shown in Figure 7a.
