Developing best practice for infilling daily river flow data
Harvey, Catherine L.; Dixon, Harry; Hannaford, Jamie. 2010 Developing best practice for infilling daily river flow data. In: Kirby, Celia, (ed.) Role of Hydrology in Managing Consequences of a Changing Global Environment. Proceeding of the BHS Third International Symposium. British Hydrological Society, 816-823.Before downloading, please read NORA policies.
Complete river flow time series are indispensable to the sustainable management of water resources and even very short gaps can severely compromise data utility. Suitably-flagged flow estimates, derived via judicious infilling, are thus highly beneficial. The UK National River Flow Archive provides stewardship of and access to daily river flow records from over 1500 gauging stations and, whilst the majority are sensibly complete, historical validation reveals a significant quantity of gaps. A full assessment of the suitability of existing techniques for infilling such gaps is lacking. This paper therefore presents an appraisal of various simple infilling techniques, including regression, scaling and equipercentile analysis, according to their ability to generate daily flow estimates for 25 representative UK gauging stations. All of the techniques rely upon data transfer from donor stations and results reveal that the equipercentile and multiple regression approaches perform best. Case studies offer further insight and an example of infilling is presented, along with areas of future study. The results demonstrate the potential for developing generic infilling methodologies to ensure a consistent and auditable approach towards infilling, which could find wider application both within the UK and internationally.
|Item Type:||Book Section|
|Programmes:||CEH Topics & Objectives 2009 onwards > Water > WA Topic 1 - Variability and Change in Water Systems > WA - 1.4 - Management and dissemination of freshwaters data|
|ISSN:||ISBN 1 903741 17 3|
|NORA Subject Terms:||Data and Information
|Date made live:||17 Nov 2010 10:25|
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