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Modeling Phosphorus Concentrations in Irish Rivers Using Land Use, Soil Type, and Soil Phosphorus Data

Landscape and Watershed Processes

Karen Daly*,a, Paul Millsb, Brian Coultera and Martin McGarrigleb

a Teagasc, Johnstown Castle Research Centre, Wexford, Ireland
b Environmental Protection Agency Regional Inspectorate, The Mall, Castlebar, Mayo, Ireland



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  		Fig. 1. Location and identification of 35 subcatchment areas used in the model development.

 


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  		Fig. 2. Relationship between proportion of high production grassland (Higrass) in a catchment and the annual flow-weighted phosphorus concentrations (MRP) values for 35 catchments, where the two clusters of data, A and B, are highlighted and separated by the broken line.

 


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  		Fig. 3. Map of predicted flow-weighted phosphorus concentrations (MRP) on a national scale using the models developed for Cluster A and B type areas.

 


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  		Fig. 4. Relationship between observed total P and predicted flow-weighted phosphorus concentrations (MRP) for (a) Cluster A and (b) Cluster B type areas of the Lough Conn and Mask catchments.

 




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The SCI Journals Agronomy Journal Crop Science
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and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2002 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.