Is there any way to quantify un-metered water usage in irrigation?

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Is there any way to quantify un-metered water usage in irrigation?

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2 Answers

  1. Irrigation

    You can use evapotranspiration method : The evapotranspiration (ET) method calculates the amount of water needed to maintain  landscaped area for a given location based on the water requirements of the type of plants, specific conditions of  the site, and precipitation received by the site.  ET represents the loss of water from the Earth’s surface through  the combined processes of evaporation (from soil and plant surfaces) and plant transpiration.   Or else, use irrigation audit method. You can find literature on both the methods.

  2. The other way is to have flumes constructed close to the intake/abstraction point; which can be calibrated; flow and depth (height) of water (Charts are generated and for every height you tell how much water is flowing and time of irrigation can be recorded); it is commonly used in community projects;