Table 4.
Median, range and standard deviation (SD) of environmental characteristics for four river types (HWS = head water streams, MGR = medium gradient rivers, LLR = lowland rivers, MES = Mediterranean streams).
| River type | Altitude [m.a.s.l.]a | Mean annual air temperature [°C]a | Mean annual precipitation [mm]a | Latitudea | Longitude | Mean january air temperature [°C] | Slope [‰] | Catchment size [km2] | Distance from source [m] | |
|---|---|---|---|---|---|---|---|---|---|---|
| HWS | Median | 478.0 | 12.3 | 1189.6 | 43.03943 | −7.327000 | 6.0 | 15.9 | 21.0 | 8.0 |
| Range | 0.0–2043.0 | 1.1–14.6 | 557.8–1564.5 | 37.84787–58.87025 | −9.090744–26.547563 | −6.4–9.7 | 0.9–294.6 | 1.0–681.0 | 1.0–62.0 | |
| SD | 363.5 | 2.6 | 254.4 | 2.909860 | 8.563482 | 4.1 | 38 | 79.1 | 9.4 | |
| MGR | Median | 210 | 8.1 | 763.9 | 48.43017 | 15.961294 | −3.5 | 7.1 | 47.0 | 13.0 |
| Range | 1.0–1595.0 | −2.3–14.7 | 474.3–1623.3 | 40.22691–68.49354 | −8.552902–29.509454 | −15.8–9.7 | 0–194.5 | 1.0–40157.0 | 1.0–521.0 | |
| SD | 291.1 | 3.4 | 251.7 | 6.771172 | 11.789414 | 5.5 | 21.1 | 4158.7 | 71.8 | |
| LLR | Median | 75.0 | 7.7 | 659.1 | 53.85842 | 17.456455 | −3.5 | 1.8 | 91.0 | 17.0 |
| Range | 0.0–470.0 | 2.4–15.9 | 562.4–1277.9 | 39.57362–63.66892 | −8.995163 27.042127 | −10.3–11.2 | 0–28.8 | 2.0–6855.0 | 1.0–240.0 | |
| SD | 82.2 | 2.1 | 108.7 | 3.799002 | 8.992162 | 3.9 | 4.4 | 1159.6 | 47.7 | |
| MES | Median | 208.0 | 13.7 | 1101.5 | 42.66090 | −7.744205 | 7.0 | 12.4 | 27.0 | 10.0 |
| Range | 2.0–1275.0 | 8.9–17.0 | 522.5 – 1562.0 | 37.18996–53.99423 | −9.245325–13.390564 | −10.3–11.2 | 0.01–97.2 | 2.0–1163.0 | 2.0–89.0 | |
| SD | 294.0 | 1.7 | 280.3 | 2.142648 | 6.236943 | 2.8 | 18.4 | 131.2 | 11.5 | |
a
Indicates variables used for river type modelling.