**Appendix A**

**Figure A1.** Spearman correlation of sediment and water data for Sampling 1 (5 November 2018). *p* ≤ 0.05 (green), *p* ≤ 0.01 (blue) and *p* ≤ 0.001 (brown), not significant (no color).

**Figure A2.** Spearman correlation of sediment and water data for Sampling 2 (15 March 2019). *p* ≤ 0.05 (green), *p* ≤ 0.01 (blue) and *p* ≤ 0.001 (brown), not significant (no color).
