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Comparison of average of heavy metals concentration in upstream and downstream sediments with guideline for sediments (mg/kg) [15–17].
| Heavy metals | Cd | Cr | Cu | Fe | Mn | Ni | Pb | Zn | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sampling point | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 |
| Average | 14.5 | 24.5 | 42 | 55.5 | 51.5 | 65 | 232 | 239 | 409 | 437 | 87.8 | 115 | 182 | 223 | 35 | 41 |
| Fresh water sediments guideline | 0.99 | 43.4 | 31.6 | — | — | 22.7 | 35.8 | 121 | ||||||||
| Marin sediments | 5.1 | 260 | 390 | — | — | — | 450 | 410 | ||||||||
1: upstream; 2: downstream.
