Table 1 Mean grain size in mm and corresponding 95% confidence intervals (CI), classification according to DIN EN ISO 14688-1 [66] and mean and standard deviation of percentage loss on ignition according to DIN 38414-3 [67] of sediment samples from the reference sites (H1-H3R, N1-N2R), restoration sites (H4, N3-N5) and transect sites (H5-H9, N6-N9) at the river Horloff in March 2017 and at the river Nidda in May 2017
Sampling site | Mean grain size in mm [95% CI] | Classification according to DIN EN ISO 14688-1 | Mean loss on ignition in % [± SD] |
|---|---|---|---|
Horloff | |||
 H1 | 0.127 [0.090–0.164] | Fine sand | 8.45 ± 0.16 |
 H2 | 0.077 [0.063–0.091] | Fine sand | 14.1 ± 0.47 |
 H3R | 0.154 [0.144–0.195] | Fine sand | 10.9 ± 0.28 |
 H4 | 0.204 [0.135–0.273] | Medium sand | 11.2 ± 0.20 |
 H5 | 0.135 [0.099–0.171] | Fine sand | 11.3 ± 0.08 |
 H6 | 0.186 [0.114–0.259] | Fine sand | 14.5 ± 0.24 |
 H7 | 0.072 [0.056–0.089] | Fine sand | 8.72 ± 0.05 |
 H8 | 0.153 [0.108–0.197] | Fine sand | 10.5 ± 0.25 |
 H9 | 0.234 [0.153–0.315] | Medium sand | 12.3 ± 0.06 |
Nidda | |||
 N1 | 0.562 [0.335–0.789] | Medium sand | 5.18 ± 0.16 |
 N2R | 0.158 [0.116–0.200] | Fine sand | 10.8 ± 0.19 |
 N3 | 0.178 [0.127–0.221] | Fine sand | 8.70 ± 0.17 |
 N4 | 0.253 [0.186–0.319] | Medium sand | 9.40 ± 0.34 |
 N5 | 0.386 [0.258–0.513] | Medium sand | 10.1 ± 0.11 |
 N6 | 0.317 [0.193–0.441] | Medium sand | 6.00 ± 0.12 |
 N7 | 0.270 [0.170–0.370] | Medium sand | 9.96 ± 0.11 |
 N8 | 0.441 [0.291–0.591] | Medium sand | 10.6 ± 0.25 |
 N9 | 0.226 [0.158–0.294] | Medium sand | 8.08 ± 0.14 |