Study the fieldwork data table below, compiled by a student investigating downstream changes in channel efficiency along a local stream.
| Site | Distance from source (km) | Wetted perimeter (m) | Cross-sectional area (m2m^2m2) | Hydraulic radius (units) |
|---|---|---|---|---|
| 1 | 0.8 | 1.40 | 0.28 | 0.20 |
| 2 | 3.4 | 3.20 | 1.12 | 0.35 |
| 3 | 7.9 | 5.50 | 2.64 | 0.48 |
Which of the following is the correct unit used for hydraulic radius in this table?
m2\text{m}^2m2
m\text{m}m
Dimensionless (no units)
m−1\text{m}^{-1}m−1
125 exam-style questions on Edexcel A GCSE Geography Investigating physical environments (rivers or coasts). Each one has a worked solution and a mark scheme showing where the marks go.