How to calculate the 100-year flood

Posted on by mrsoltys
There are a number of ways to calculate the 1 in 100 flood, some more complicated than others. This simple way does a great job of explaining the basics (and the shortcomings behind the metric).  First we start with historical data, and we need a good chunk of it. Since we're in Boulder I'm going to use the Boulder Creek @...Read More

About 100 year floods (and probabilities, and risk analysis)

Posted on by mrsoltys
I'm based in Boulder, and it's flooding.  Luckily, we're all fine here. Flooding is kind of a weird natural disaster.  First: It doesn't feel very threatening: It's just raining outside... a lot. But it does post some serious risks and deserves to be taken seriously. 100 year floods (Should be called: the 1% flood) [caption id="attachment_1348" align="alignright" width="300"] Near Boulder Creek...Read More