Table 2.
Comparison of (A) geomorphic and (B) wood jam characteristics in reaches 2 and 3.
| Wide reach (R3) | Narrow reach (R2) | ||
|---|---|---|---|
| A. Geomorphic and wood jams features (not tested statistically) | |||
| Section length (km) | 3.34 | 1.35 | |
| Total area of low-flow water table (ha) | 16.63 | 3.5 | |
| Total area of inundated zone (ha) | 23.75 | 5.77 | |
| Total volume of wood jams within the inundated zone (m3) | 140.6 | 87.9 | |
| Total mass of wood jams within the inundated zone (t) | 10,547 | 6592 | |
| Number of wood jams within the inundated zone (items per 1 km of river length) | 10.5 | 50.4 | |
| Number of wood jams within the inundated zone (items per 1 ha) | 2.1 | 11.8 | |
| Specific mass of wood jams within the inundated zone (kg per ha) | 1480 | 2892 | |
| Volume of wood jams within the inundated zone (m3 per 1 ha) | 5.92 | 15.2 | |
| Specific wood area in the inundated zone (m2 per 1 km of river length) | 48.7 | 97 | |
| Volume of wood jams within the inundated zone (m3 per 1 km of river length) | 20.3 | 67.1 | |
| n = 35 | n = 68 | p value | |
|---|---|---|---|
| B. Geomorphic and wood jam features (tested statistically) | |||
| Mean width of low-flow channel (m) | 26.1 | 23.1 | p = 0.14 |
| Mean width of inundated zone (m) | 75.2 | 42.4 | p < 0.0001 |
| Mean mass of wood jams within the inundated zone (t) | 301.3 | 96.9 | p < 0.0001 |
| Mean elevation of wood jams above low-flow water table (m) | 0.53 | 0.83 | p = 0.0002 |
| Total wood area in the inundated zone (m2) | 163 | 131 | p < 0.0001 |
| Mean volume of wood jam within the inundated zone (m3) | 4 | 1.29 | p < 0.0001 |
Statistical comparisons were performed based on measurements done and calculated based on Statistically significant differences between the reaches for the given parameters are highlighted in bold.