A: The term “100-year flood” is often used as an attempt to simplify the definition of a flood that statistically has a 1-percent chance of occurring in any given year. Likewise, the ...

Most years it’s the number one natural disaster in the US by dollars of damage. So being able to characterize flood risks is a crucial job of civil engineers. Engineering hydrology has equal ...

GRAFTON, N.D. – The Grafton Flood Risk Reduction Project, a project to divert the Park River and stop overland flooding, has officially removed Grafton from the 100-year floodplain. On Jan. 19 ...

La Crosse’s record daily rainfall on Saturday highlights a problem that is no longer a once in a hundred-year phenomenon. Flood mitigation is an old conversation. Just step into the La Crosse ...

Below you’ll find what's expected to be inundated in a 100-year flood, which has a 1-percent chance of occurring in a year, and a 500-year flood, which has a 0.2 percent chance of occurring in a ...

New flood barriers would extend on the west side of the Napa River from near the Oxbow at the River Terrace Inn to north of ...

It would remove 39 houses from the 25-year floodplain and 11 from the 100-year floodplain. “The ponds also allowed the system to efficiently convey the 25-year storm when it previously could not ...

The U.S. Army Corps of Engineers recently answered some frequently asked questions in a press release: Q: What does a “100-year flood” mean? A: The term “100-year flood” is often used as an ...