T-year event

{
  "id": "MLC-T-MET-009859",
  "term": "T-year event",
  "field": "Meteorology and atmospheric science",
  "definition": "A meteorological or hydrological event, such as a flood or rainfall storm, of a magnitude that is statistically expected to be equaled or exceeded on average once every T years. The recurrence interval T is the reciprocal of the annual exceedance probability; for example, a 100-year event has a 1% chance of being equaled or exceeded in any given year. This statistical measure is used in engineering design, risk assessment, and floodplain management to characterize the severity of extreme events.",
  "url": "https://mlchart.com/terminology/meteorology/t-year-event/"
}