Lake

{
  "id": "MLC-T-ENV-015270",
  "term": "Lake",
  "field": "Environment",
  "definition": "1. In EMAP, a standing body of water greater than 1 hectare (about 2.5 acre) that has at least 1000 m2 (about 0.25 acre) of open water and is at least 1 meter (about 3 feet) deep at its deepest point.\n\n2. Natural water body where the inlet flows moving under the force of gravity are greater than the outlet flows and fed by surface and underground runoff [Original source: adapted from http://www.eolss.net/sample-chapters/c07/e2-03-01-03.pdf].\n\n3. A component of Earth's surface water. A lake is where surface-water runoff (and maybe some ground-water seepage) have accumulated in a low spot, relative to the surrounding countryside.\n\n4. A body of fresh or salt water entirely surrounded by land.\n\n5. A natural inland body of water, fresh or salt, extending over 40 acres or more and occupying a basin or hollow on the earth’s surface, which may or may not have a current or single direction of flow.\n\n6. Slow-moving or standing body of freshwater that occupies an inland basin that is not a stream, spring, or wetland.\n\n7. Any inland body of open water with some minimum surface area free of rooted vegetation and with an average hydraulic retention time of more than 7 days. Lakes or reservoirs might be natural water bodies or impounded streams, usually fresh, surrounded by land or by land and a man-made retainer (e.g., a dam). Lakes or reservoirs might be fed by rivers, streams, springs, and/or local precipitation. Flow-through reservoirs with an average hydraulic retention time of 7 days or less should be considered a freshwater river or stream.[40 CFR 125.83 (CFR 2013)]\n\n8. Standing bodies of open water that contribute surface water flow to a water identified in paragraph (1)(i) of this definition in a typical year either directly or through one or more waters identified in paragraph (1)(ii), (iii), or (iv) of this definition. A lake, pond, or impoundment of a jurisdictional water does not lose its jurisdictional status if it contributes surface water flow to a downstream jurisdictional water in a typical year through a channelized non-jurisdictional surface water feature, through a culvert, dike, spillway, or similar artificial feature, or through a debris pile, boulder field, or similar natural feature. A lake or pond, or impoundment of a jurisdictional water is also jurisdictional if it is inundated by flooding from a water identified in paragraph (1)(i), (ii), or (iii) of this definition in a typical year.\n\n9. A natural inland body of water, fresh or salt, occupying a basin or hollow on the earth's surface, which may or may not have a current or single direction of flow.",
  "subject": "Ecosystems",
  "references": [
    "Environmental Modeling and Assessment Program (EMAP) Master Glossary",
    "Federal LCA Commons Elementary Flow List for Life Cycle Assessment",
    "USGS Water Science for Schools",
    "NASA Earth Observatory Glossary",
    "USDA Natural Resources Conservation Service Glossary",
    "40 CFR 131.43 (CFR 2013)",
    "40 CFR 125.93 (CFR 2013)",
    "40 CFR 120.2 (CFR 2020)",
    "NSTEPS Online Glossary of Terms; N-STEPS Online Glossary of Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/lake/"
}