Welcome to the new forum
flash flooding destroyed downtown Ellicott cityMD Saturday!some of the video is crazy when it's happeningbut the aftermath in the second video is even more shocking
As a hydrologist, I cringe every time someone on the news uses "100-year storm" or "1000-year storm".The 100-year storm is an "exceedance probability", meaning there is a 1 percent chance of a storm of that magnitude occurring in a given year.Old Elliott City was regrettably built at the confluence of about 5 streams. Someone has cherry picked a piece of data somewhere in that watershed where 6 inches of rain fell. A 1000-year event, while technically true, isn't the whole picture.Yes it floods frequently there. Development in Howard County most likely makes runoff more intense then it once was. Climate change is also throwing our statistics out of whack.
Quote from: IamHydrogen on August 01, 2016, 07:10:50 amAs a hydrologist, I cringe every time someone on the news uses "100-year storm" or "1000-year storm".The 100-year storm is an "exceedance probability", meaning there is a 1 percent chance of a storm of that magnitude occurring in a given year.Old Elliott City was regrettably built at the confluence of about 5 streams. Someone has cherry picked a piece of data somewhere in that watershed where 6 inches of rain fell. A 1000-year event, while technically true, isn't the whole picture.Yes it floods frequently there. Development in Howard County most likely makes runoff more intense then it once was. Climate change is also throwing our statistics out of whack. ^ nominated for the hall of fame.
Quote from: sweetcell on August 01, 2016, 10:17:03 amQuote from: IamHydrogen on August 01, 2016, 07:10:50 amAs a hydrologist, I cringe every time someone on the news uses "100-year storm" or "1000-year storm".The 100-year storm is an "exceedance probability", meaning there is a 1 percent chance of a storm of that magnitude occurring in a given year.Old Elliott City was regrettably built at the confluence of about 5 streams. Someone has cherry picked a piece of data somewhere in that watershed where 6 inches of rain fell. A 1000-year event, while technically true, isn't the whole picture.Yes it floods frequently there. Development in Howard County most likely makes runoff more intense then it once was. Climate change is also throwing our statistics out of whack. ^ nominated for the hall of fame.Seconded. I love that he has 20 posts in a decade and just showed up to school everyone on rain.
Quote from: Julian, the BELOVED on August 01, 2016, 10:25:29 amQuote from: sweetcell on August 01, 2016, 10:17:03 amQuote from: IamHydrogen on August 01, 2016, 07:10:50 amAs a hydrologist, I cringe every time someone on the news uses "100-year storm" or "1000-year storm".The 100-year storm is an "exceedance probability", meaning there is a 1 percent chance of a storm of that magnitude occurring in a given year.Old Elliott City was regrettably built at the confluence of about 5 streams. Someone has cherry picked a piece of data somewhere in that watershed where 6 inches of rain fell. A 1000-year event, while technically true, isn't the whole picture.Yes it floods frequently there. Development in Howard County most likely makes runoff more intense then it once was. Climate change is also throwing our statistics out of whack. ^ nominated for the hall of fame.Seconded. I love that he has 20 posts in a decade and just showed up to school everyone on rain.and his screen name is a song from your favorite band, even better!