Whilst dredging can in some cases reduce flooding duration, it cannot prevent flooding during these extreme events and should therefore not be considered as the winning solution to flooding events.ĭredges are used in this capacity to clean ponds of decaying byproducts of the breeding process and to keep water clarity at acceptable levels. Is dredging a good solution?įrom an ecological perspective, dredging can have many significant impacts upon river ecosystems and their wildlife. There were six main potential impacts identified as associated with dredging: habitat loss, hydraulic entrainment, release of contaminants, sedimentation, suspended sediment and underwater noise (Figure 1). What are the 3 major effects of dredging? Removing sediment can maintain the appropriate width and depth for enabling the safe, unobstructed passage of cargo vessels carrying oil, raw materials, and other essential commodities.ĭredging impacts marine organisms negatively through entrainment, habitat degradation, noise, remobilization of contaminants, sedimentation, and increases in suspended sediment concentrations. The advantages of dredging are: Widening and Deepening: Dredging can be a critical process for the commercial shipping industry. Dredging impacts marine organisms negatively through entrainment, habitat degradation, noise, remobilization of contaminants, sedimentation, and increases in suspended sediment concentrations.
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