Skip to main content


Title: Teddington low flow survey 1991
Author: Clare Dale
Document Type: Monograph
Annotation: EA additional title info: National Rivers Authority Biology
In 1976, following a very dry spring and early summer, a drought order was brought in to allow increased abstraction from the River Thames to take place, in order to maintain drinking water supplies. Consequently, flows over Teddington weir fell to extremely low levels. Due to the conditions of the Thames Water Authority abstraction licence, restrictions on flow could not be invoked early on in the year. It was proposed that if there had been more flexible restrictions on flow, there would have been less need for drastic flow reduction, and reservoir supplies could still have been maintained. The effects of these low flows in 1976, and the resulting public inquiry of 1986 led to the creation of the Teddington Flow Proposal. This allowed Thames Water Authority to vary the conditions of its licence to abstract water from the River Thames between Windsor and Teddington. Increased abstraction during the winter and spring period was allowed, in order to maintain reservoir levels and prevent excessive abstraction during the summer. The minimum target flow over the weir could be reduced, when necessary, to 200 thousand cubic metres of water per day (tcmd). The Proposal recommended biological monitoring of the river, the results of which, as well as further information regarding the Proposal, are detailed in the Teddington Low Flow Survey reports of 1989 and 1990 (Attrill, 1990 and 1991). This document presents the results of the 1991 Teddington Low Flow Survey.
Publisher: National Rivers Authority
Publication Date: [1992]
Publication Place: Reading
Subject Keywords: RiversDroughtDrinking water systemsWater abstractionWater abstraction licenses
Geographic Keywords: EnglandThames
Extent: 16; + figures, tables and appendices
Total file downloads: 317

Download PDF    Display PDF in separate tab