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Title: Extending Rutland yield analysis to 1933 : supporting documentation for the regional water resources strategy
Author: Glenn Watts
Document Type: Monograph
This is the third report in a series of supporting documents for the Anglian Region Water Resources Strategy. The yield of Rutland Water is calculated using a model which simulates the behaviour of the reservoir using historic flow records. For the most important component of the Rutland system, flow in the River Nene, gauging started in 1940. Yield analysis previously started at this date. Analysis of the yield of other reservoir systems in the Anglian Region has shown that the drought of 1934 to 1935 is the most severe on record. To allow comparison of the yield of Rutland with the yields of other systems, it is necessary to analyse the behaviour of the reservoir from 1933 onwards. This report describes the methods used to extend the flow records required for Rutland yield analysis. The effect of the extension of the records is considerable; for 1992 conditions the yield calculated using the records from 1933 to 1992 is 45 tcmd (almost 20%) lower than that calculated using the 1942 to 1992 period. Limited testing of the extended records suggest that they should provide a reasonable estimate of reservoir yield. However, there is room for improvement in the simulation of Nene and Welland flows, and consideration should be given to this. The results emphasise the importance of the 1930s drought in assessing the yield of Rutland Water. Any analysis which does not consider this period will overestimate Rutland yield.
Publisher: National Rivers Authority
Publication Date: 1993
Publication Place: Peterborough
Subject Keywords: Regional planningWater resourcesWater reservoirsModelsFlow rate
Geographic Keywords: RutlandNene (river)Nene catchment
Extent: 12; + appendices and figures
Total file downloads: 258

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