As part of a physical geography river hydrology investigation, students measured the flow velocity (m s−1m\ s^{-1}m s−1) at four different distances across a river channel transect. At each distance, measurements were taken at three different depths (Surface, Mid-depth, and Bed).
| Distance from Left Bank (m) | Surface Velocity (m s−1m\ s^{-1}m s−1) | Mid-depth Velocity (m s−1m\ s^{-1}m s−1) | Bed Velocity (m s−1m\ s^{-1}m s−1) |
|---|---|---|---|
| 0.5 | 0.12 | 0.08 | 0.05 |
| 1.0 | 0.24 | 0.18 | 0.11 |
| 1.5 | 0.35 | 0.28 | 0.15 |
| 2.0 | 0.42 | 0.31 | 0.22 |
Calculate the median flow velocity for all the measurements recorded during this investigation. You should show your workings.