River environments

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Question 15

Figure 4a: River downstream bedload data

Site number	Distance from source (km)	Mean bedload size (?)
1	1.2	145
2	3.5	112
3	5.8	85
4	8.2	64
5	12.1	38
6	17.5	15

Using Figure 4a, identify the correct unit for mean bedload size.

$m/s\text{m/s}$

$mm\text{mm}$

$km2\text{km}^2$

$cm3\text{cm}^3$