Derivation of an 88-year inflow record for Talla Reservoir, Scotland, withspecial reference to low flows

A new synthetic inflow record for Talla Reservoir is derived from reservoir log data for the period 1907-94. The paper describes (i) the procedures wh ich were adopted for the derivation, based upon a reservoir water balance, and (ii) the changes in contributing area. For the years since construction of an upstream reservoir in 1968, the summer analysis draws on data from a neighbouring catchment in order to provide analysis of a more homogeneous time series. The paper also discusses the possibility of undertaking simila r work for other reservoirs, as a means of improving the knowledge of the p ast variability of UK water resources.