What does water year mean?

Definitions for water year
wa·ter year

This dictionary definitions page includes all the possible meanings, example usage and translations of the word water year.

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  1. water yearnoun

    The timespan between October 1 and September 30 of the next year.


  1. Water year

    A water year (also called hydrological year, discharge year or flow year) is a term commonly used in hydrology to describe a time period of 12 months for which precipitation totals are measured. Its beginning differs from the calendar year because part of the precipitation that falls in late autumn and winter accumulates as snow and does not drain until the following spring or summer's snowmelt. The goal is to be ensure that as much as possible of the surface runoff during the water year is attributable to the precipitation during the same water year.Due to meteorological and geographical factors, the definition of the water years varies. The United States Geological Survey (USGS) defines it as the period between October 1 of one year and September 30th of the next, as late September to early October is the time for many drainage areas in the US to have the lowest stream flow and consistent ground water levels. The water year is designated by the calendar year in which it ends, so the 2010 water year started on October 1, 2009 and ended on September 30, 2010.One way to identify a water-year is to find that successive 12-month period that most consistently, year after year, gives the highest correlation between precipitation and streamflow and negligible changes in storage (i.e., soil water and snow). Usually, the time when the variation of storage from year to year is the smallest is the time with the minimum storage level and minimum flow. However, the practical considerations also affect the water year definitions. For example, in Canada the water year starts in October, apparently to coincide with the US one, although better measurement conditions exist in winter.To accommodate the regional and climatic variations, some researchers use a per-gauge local water year that starts in the month with the lowest average streamflow.

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How to say water year in sign language?


  1. Chaldean Numerology

    The numerical value of water year in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of water year in Pythagorean Numerology is: 8

Examples of water year in a Sentence

  1. Tommy Beaudreau:

    While it’s encouraging, it’s great, the long-term trend here has been continued drought and water shortages, but there’s a chance even with a good water year that it just kind of pushes the curve out a few months and we have to continue our planning process accordingly.

  2. Marcie McCartney:

    Everybody around and in that basin is doing all they can to use water as wisely as possible, we're seeing a lot of( water) saving this year, which is awesome, but Great Salt Lake is definitely suffering, and the only way we're going to get those lake levels up higher is a better water year for our snow pack.

  3. Alex Tardy:

    The fires can grow 1,000 acres in one hour, so it is critical to get suppression ASAP, especially in Santa Ana dry wind and warm conditions, the summer of 2021 was the warmest on record for mountains and deserts, so that is much extra stress on the vegetation. The winter of 2020-21 was about 40 to 50 % of average rainfall( dry water year), so that also adds to more stress and drying of fuels( live or dead fuels).


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"water year." Definitions.net. STANDS4 LLC, 2023. Web. 4 Dec. 2023. <https://www.definitions.net/definition/water+year>.

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