Loading

{
  "id": "MLC-T-ENV-015945",
  "term": "Loading",
  "field": "Environment",
  "definition": "1. The rate of release of a constituent of interest to a particular receiving medium.\n\n2. The quantity of a substance entering the environment (soil, water, or air).\n\n3. The total amount of pollutants entering a waterbody from one or multiple sources, measured as a rate, as in weight per unit time or per unit area.\n\n4. Quantity of a specific substance present per unit of surface area, such as the amount of lead in micrograms contained in the dust collected from a certain surface area divided by the surface area in square feet or square meters.\n\n5. Ratio of the biomass of gammarids (grams, wet weight) to the volume (liters) of test solution in either a test chamber or passing through it in a 24-hour period.\n\n6. Amount of matter or thermal energy that is introduced into a receiving water; to introduce matter or thermal energy into a receiving water. Loading may be either man-caused (pollutant loading) or natural (natural background loading).",
  "subject": "Policy and guidance",
  "see_also": [
    "Pollutant Loading"
  ],
  "references": [
    "Modeling Glossary; EPA Guidance on the Development, Evaluation and Application of Environmental Models EPA/100/K-09/003 | March 2009 at http://www.epa.gov/crem/library/cred_guidance_0309.pdf",
    "Drinking Water Technical & Legal Terms",
    "Impaired Waters and Total Maximum Daily Loads Glossary",
    "40 CFR 745.63 (CFR 2013)",
    "40 CFR 795.120 (CFR 2013)",
    "40 CFR 130.2 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/loading/"
}