From 1981 to 1995 the NRFA published annual Yearbooks as part of the Hydrological Data UK series, bringing together the principal datasets relating to river flows, groundwater levels and areal rainfall throughout the UK and featuring a comprehensive hydrological review of the year. Also included in the editions for 1986-95 are water quality data for a representative selection of river basins throughout Britain. Publication of the Yearbooks in the Hydrological Data UK series was discontinued following the 1995 edition. Hard copies of Yearbooks are available from the National River Flow Archive, though a few editions are out of print: Contact the NRFA.
