Your article on “Remembering the Great Flood of 1916: A Q&A with Filmmaker David Weintraub,” [June 15, Xpress] was very interesting and certainly timely in this new era of weather extremes.
One common error needs to be corrected, however. The filmmaker, David Weintraub, in making a point about land use and flooding, says: “This is where we live — a 100-year flood happens every 20 years here. Since the last one was 2004, you might say we’re due.” I understand the point he is making, but he doesn’t seem to understand the concept of the 100-year flood.
It is not that a flood of a certain magnitude will happen every 100 years, but rather that it has a 1 percent chance of occurring any year. You could experience a 100-year flood in consecutive years. That would be bad luck, but not unprecedented. So stay out of the flood plain!
— Paul Kelman