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The database could support further development of environmental flow assessment (EFA) methodologies. For example, some of the existing desktop EFA methods make use of the estimates produced by comprehensive EFAs and analyze those estimates (e.g. EF as % of total flow etc) in the context of hydrological variability. However those methods are only locally calibrated. The DB can allow to expand their application to different regions, countries and flow regimes. It can support the development of global EF standards. Studies which aim to provide such estimates, or which contain the description of EF already provided, should be able to explicitly indicate the magnitude of EFs, the environmental objective they have, and the proportion of the long-term mean annual flow they constitute together with the characteristic measure(s) of hydrological variability.

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