Water terms starting with I

125 terms

  1. Inundate To cover with impounded waters or floodwaters.
  2. Inundation Area Area downstream from a dam that would be subject to flooding in the event of a dam failure or large spillway release. See also, "Flood Plain".
  3. Inundation Map A map delineating the area that would be flooded by a particular flood event. It includes the ground surfaces downstream of a dam showing the probable…
  4. Invert The lowest point of an underground excavation or the lowest point of the interior of a circular conduit, pipe, or tunnel.
  5. Invertebrates All animals without a vertebral column, e.g. spiders, crabs, or worms.
  6. Investor Owned Utility (IOU) A power provider owned by stockholders or other investors; sometimes referred to as a private power provider, in contrast to a public power provider that…
  7. Ion An atom or molecule that has lost or gained one or more electrons and has become electrically charged as a result.
  8. Iowa vane A flow deflector that will divert water in a way calculated to attract fish.
  9. Irretrievable Commitments that are lost for a period of time.
  10. Irreversible Commitments that cannot be reversed, except perhaps in the extreme long term.
  11. Irrigable acreage for service (irrigable area for service) The acreage classified as irrigable for which project works have been constructed and project water is available.
  12. Irrigable area not for service Part of the total irrigable area for which service eventually will be available but for which project facilities have not yet been constructed.
  13. Irrigable land Arable land under a specific plan for which a water supply is or can be made available and which is provided with or planned to be provided with…
  14. Irrigated acreage Irrigable acreage actually irrigated in any one year. It includes irrigated cropland harvested, irrigated pasture, cropland planted but not harvested, and…
  15. Irrigated Area The gross farm area upon which water is artificially applied for the production of crops, with no reduction for access roads, canals, or farm buildings.
  16. Irrigation The controlled application of water for agricultural purposes through manmade systems to supply water requirements that are not satisfied by rainfall.
  17. Irrigation check Small dike or dam used in the furrow alongside an irrigation border to make the water spread evenly across the border.
  18. Irrigation district A cooperative, self-governing public corporation set up as a subdivision of the State government, with definite geographic boundaries, organized and…
  19. Irrigation Efficiency The ratio of the average depth of irrigation water that is beneficially used to the average depth of irrigation water applied, expressed as a percent.
  20. Irrigation Requirement Quantity of water, exclusive of effective precipitation, that is required for crop production. See crop irrigation requirement.
  21. Isobath An imaginary line on the earth's surface or a line on a map connecting all points which are the same vertical distance above the upper or lower surface of…
  22. Isochrome A curve showing the distribution of the excess hydrostatic pressure at a given time during a process of consolidation.
  23. Isohyet A line that connects points of equal rainfall.
  24. Isothermal Having a constant temperature.
  25. Isotropic mass A mass having the same property (or properties) in all directions.