It seems the community has been crying out for a post of this nature and so here I am; gallantly riding into the maelstrom of a politically sensitive issue, on the back of my watery steed, wielding my lance of science and wearing my armour of academic integrity.
For starters, this is a complex topic. The exact ramifications of river dredging upon geomorphology will be a function of the river typology, sediment characteristics, the dredging technique employed, existing floodplain connectivity and antecedent environmental conditions – the points made within this post are theoretical and generic, just like my post on the geomorphic impact of weir removal. I’d invite you to highlight examples where what I suggest should happen, hasn’t happened.
Another point to make is that the academic literature has relatively little information on the geomorphic effects of river dredging in low-energy rivers. A few key papers have highlighted the following morphological effects of dredging in high-energy…
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