Table 1.
Field study site characteristics
| Study reach | UC1 | MT1 | PC4 | PC2 | AB1 | AB4 | PC1 | PC5 |
|---|---|---|---|---|---|---|---|---|
| Pleistocene glacial history | Glaciated | Glaciated | Glaciated | Glaciated | Glaciated | Glaciated | Non-glaciated | Non-glaciated |
| Vegetation zone | Subalpine | Subalpine | Subalpine | Subalpine | Subalpine | Montane | Montane | Montane |
| Elevation (m) | 3054 | 3035 | 3013 | 2927 | 2901 | 2547 | 2420 | 2226 |
| Drainage area (km2) | 12.7 | 14.8 | 10.1 | 11.1 | 19.1 | 82.2 | 105.3 | 243.8 |
| Valley width (m) | 26 | 61 | 15 | 14 | 67 | 247 | 33 | 27 |
| Valley length (m) | 55 | 100 | 40 | 60 | 90 | 215 | 130 | 170 |
| Channel width (m) | 6 | 7 | 4 | 5 | 7 | 14 | 17 | 13 |
| Confinement (m m−1) | 0.22 | 0.11 | 0.25 | 0.36 | 0.10 | 0.06 | 0.51 | 0.46 |
| Channel slope (m m−1) | 0.028 | 0.063 | 0.069 | 0.063 | 0.037 | 0.012 | 0.037 | 0.023 |
| Stream power (W m−1) | 1740 | 3994 | 4183 | 3856 | 2439 | 1237 | 4319 | 4562 |
| Unit stream power (W m−2) | 312 | 111 | 1140 | 753 | 357 | 88 | 252 | 358 |
| Sediment volume (m3) | 402 | 1269 | 169 | 101 | 3126 | 28799 | 590 | 816 |
| Total reach mass (Mg) | 362 | 1142 | 152 | 91 | 2814 | 25919 | 531 | 734 |
| Mean sample depth (cm) | 35 | 28 | 38 | 27 | 36 | 41 | 39 | 24 |
| Charcoal Sample size, n | 2 | 15 | 6 | 3 | 6 | 3 | 9 | 8 |
| Mean Age (cal y BP) | 1417 ± 880 | 1203 ± 545 | 1320 ± 512 | 178 ± 134 | 2108 ± 2140 | 1116 ± 551 | 668 ± 68 | 486 ± 443 |
| Flux per valley length (kg m−1 yr−1) | 16.2 | 8.3 | 6.0 | 2.8 | 7.1 | 98.7 | 4.0 | 7.9 |
Potential predictors for site averages of the weighted mean 14C ages and flux of fine floodplain sediment per valley length. Site-average ages are presented with standard deviations of the mean as errors