Evaluation of the EV1 distribution for different low flow series in the Shannon river basin in Ireland

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Title: Evaluation of the EV1 distribution for different low flow series in the Shannon river basin in Ireland
Authors: Nasr, Ahmed Elssidig
Bruen, Michael
Permanent link: http://hdl.handle.net/10197/2287
Date: Apr-2009
Abstract: The Shannon river basin is the largest in Ireland and it encompasses a number of urban and rural towns. The water of this river provides the demand for drinking, agriculture, ecology, industry, etc. Therefore it is essential to ensure that such demands are available during dry season where the rainfall ceases and the source of water is the baseflow from groundwater. In this study a frequency analysis of the time series of different low flow events have been carried out. The results of this analysis allow of assessing the availability of water to satisfy the required demands during the case of any drought period which may occur in the future. The EV1 distribution, which has been adopted in Ireland, has been fitted to each time series using three methods: (i) method of moments; (ii) method of maximum likelihood; and (iii) method of probability weighted moments. Time series of six low flow events including (1) annual minimum; (2) 3-day sustained low flow (3-SLF); (3) 7-SLF; (4) 10-SLF; (5) 15-SLF; and (6) 30-SLF have been extracted for 55 hydrometric stations in the basins. These stations have been selected because of the availability of flow records which allow of having enough points in each time series. They are also representative for the basin since their catchments cover wide area in the basin.
Funding Details: Other funder
Type of material: Conference Publication
Publisher: European Geosciences Union
Journal: Geophysical Research Abstracts
Volume: 11
Issue: EGU2009-5461-1
Copyright (published version): Author(s) 2009
Keywords: Low flow frequency curveEV1 distributionShannon river basin
Subject LCSH: Stream measurements--Ireland--Shannon River
Streamflow--Mathematical models
Other versions: http://meetingorganizer.copernicus.org/EGU2009/EGU2009-5461-1.pdf
Language: en
Status of Item: Peer reviewed
Conference Details: Presented at the European Geosciences Union General Assembly 2009, Vienna, Austria, 19 – 24 April 2009
Appears in Collections:Centre for Water Resources Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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