Strengths - Reduces the amount of nutrients in sediments that are beneficial to plant development. - Prevents infilling of the stream - Slows the eutrophication dynamics of the stream. - Improves airworthiness in the river. - Positive impacts in long terms (6 to 24 months after dredging) for heavy metals reduction. | Weaknesses - Excessive cost of operation. - Short term negative impacts (turbidity, Resuspension of sediment, saturation of water with toxic metal). |
Threats - Potential effects of dredging on living organisms. - Problems of treatment and disposal of extracted sediments. | Opportunities - Environmental assessments of the removed sediments - Need to develop process environmentally friendly: - Dredging techniques are often costly; however precise dredging can lower the dredging cost by determination of dredging depth based on the pollution level prior dredging. This method can also provide a favorable environment for the benthos, - Re-use or remediation of contaminated dredged sediments. |