100-years flood Archives

Talking about return rate is a disservice to the public

Talking about return rate is a disservice to the public even if flood experts usually use the term when communicating to the public. Background of Bell Falls Hydro Dam The officials stated that: “… The dam was designed for a maximum one-thousand-year flood of 960 cubic metres per second.” We will look at relatively rare events. For the sake of this discussion, let’s consider events with a probability of less than 1/10 per year. At 1/10 talking about probability to…