Using the table below, calculate the mean annual suspended sediment yield for the river basin from 1980 to 2020.
Table 1: River Basin Suspended Sediment Yield (1980−20201980-20201980−2020)
| Year | Suspended Sediment Yield (t km−2 yr−1\text{t km}^{-2}\text{ yr}^{-1}t km−2 yr−1) |
|---|---|
| 1980 | 124.5 |
| 1990 | 138.2 |
| 2000 | 112.8 |
| 2010 | 145.6 |
| 2020 | 160.9 |
130.3 t km−2 yr−1130.3\text{ t km}^{-2}\text{ yr}^{-1}130.3 t km−2 yr−1
136.4 t km−2 yr−1136.4\text{ t km}^{-2}\text{ yr}^{-1}136.4 t km−2 yr−1
138.2 t km−2 yr−1138.2\text{ t km}^{-2}\text{ yr}^{-1}138.2 t km−2 yr−1
170.5 t km−2 yr−1170.5\text{ t km}^{-2}\text{ yr}^{-1}170.5 t km−2 yr−1
19 exam-style questions on AQA GCSE Geography Numerical skills. Each one has a worked solution and a mark scheme showing where the marks go.