The Worcester Wildlife Trust say that dredging is not the answer to river flooding.
In contrast to the views of many, they say they are compensating for dredging in the 1970's and 1980's, by allowing greenery to grow to absorb water and creating bends in waterways to slow down flow.
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It's said that the man had threatened to jump off a bridge with the children if a "new house and financial assistance" was not provided.
The figures have been released almost a week after a four-year-old boy had his face bitten by a dog.
Michael Roles of Bridlington was found guilty of 15 counts of sexual offences against children.