Perched aquifer

{
  "id": "MLC-T-ENV-020511",
  "term": "Perched aquifer",
  "field": "Environment",
  "definition": "1. A lens of saturated soil above the main water table that forms on top of an isolated geologic layer of low permeability.\n\n2. A special case of unconfined aquifer which occurs wherever an impervious (or semipervious) layer of limited areal extent is located between the regional water table of an unconfined aquifer and the ground surface.",
  "subject": "Land, waste and cleanup",
  "references": [
    "Underground Storage Tank Sites Guide Glossary",
    "Leaking Underground Storage Tanks Sites Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/perched-aquifer/"
}