Encroachment method

{
  "id": "MLC-T-MET-005364",
  "term": "Encroachment method",
  "field": "Meteorology and atmospheric science",
  "definition": "A hydraulic modeling procedure used in floodplain management to determine the boundaries of a floodway. The method involves simulating artificial obstructions, or encroachments, on the edges of a river's floodplain and calculating the resulting increase in the water surface elevation for a specific flood event, such as the 100-year flood. Under U.S. FEMA regulations, the floodway is defined so that these encroachments do not cause the base flood elevation to rise by more than one foot.",
  "see_also": [
    "energetics method"
  ],
  "url": "https://mlchart.com/terminology/meteorology/encroachment-method/"
}