Uncertainties associated with the measurements and estimations of line item values result in unaccounted-for difference in this account. For the connected surface water system, volume for the unaccounted-for difference can not be calculated separately. This is because a value for evaporation and seepage from river channels within the connected surface water system and evapotranspiration within the riverine floodplains is not separately available.
Therefore, evaporation and seepage from river channels within the connected surface water system and evapotranspiration within the riverine floodplains, and unaccounted-for difference volume are provided together in Line item 14.10 Riparian and flood plain use.
National Water Account 2010
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