Table 1
Sample sizes by study reach and their altitude (as metres above sea level, MSL), river flow (as Q values, m3 s−1; CEH, 2016), and average score per taxon (ASPT, as a measure of biological water quality), mean concentrations of ammonia (mg N L−1), nitrate (mg L−1) and phosphates (mg L−1) in 2009 (Environment Agency, 2009).
| Reach | n | MSL (m) | Q10 | Q50 | Q95 | ASPT | NH3 | Nitrates | Phosphates | Mean width | Mean depth (m) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 37 | 48 | 34.9 | 8.3 | 1.6 | 6.1 | 0.05 | 20.9 | 0.05 | 15 | 1.0 |
| 2 | 98 | 21 | 42.1 | 10.1 | 2.0 | 6.0 | 0.03 | 20.1 | 0.06 | 15 | 1.0 |
| 3⁎ | 88 | 8 | 219.0 | 53.6 | 15.4 | 4.9 | 0.06 | 22.0 | 0.24 | 35 | 4.0 |
| 4 | 18 | 17 | 146.5 | 36.5 | 10.7 | 5.8 | 0.04 | 17.4 | 0.14 | 25 | 2.0 |
Data presented for the River Severn section of the reach, rather than the River Teme (Fig. 1).
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