Document Detail

Modelling nitrate losses from agricultural activities on a national scale.
MedLine Citation:
PMID:  15850205     Owner:  NLM     Status:  MEDLINE    
The Nitrogen Risk Assessment Model for Scotland (NIRAMS) has been developed as a screening tool for prediction of streamwater N concentrations draining from agricultural land in Scotland. The objective of the model is to be able to predict N concentrations for ungauged catchments, to fill gaps in monitoring data and provide guidance in relation to policy development. The model uses national land use, soils and meteorology data sets and has been developed within an ArcView GIS user interface. The model includes modules to calculate N inputs to the land, residual N remaining at the end of the growing season, weekly time-series of leached N and transport of N at the catchment scale. The N leaching and transport are. controlled by hydrological modules, including a national water balance model and a catchment scale transport model. Preliminary testing of NIRAMS has been carried out on eight Scottish catchments, diverse in terms of geographic location as well as land use. The model is capable of predicting the correct mean level of stream N concentrations, as well as the basic characteristics of seasonal variation. As such the model can be of value for providing estimates of N concentrations in ungauged areas.
S M Dunn; A J A Vinten; A Lilly; J DeGroote; M McGechan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water science and technology : a journal of the International Association on Water Pollution Research     Volume:  51     ISSN:  0273-1223     ISO Abbreviation:  Water Sci. Technol.     Publication Date:  2005  
Date Detail:
Created Date:  2005-04-26     Completed Date:  2005-08-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  319-27     Citation Subset:  IM    
The Macaulay Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, UK.
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MeSH Terms
Models, Theoretical*
Nitrates / analysis*
Nitrogen / analysis*
Rivers / chemistry
Water Movements*
Water Pollutants, Chemical / analysis*
Water Supply
Reg. No./Substance:
0/Nitrates; 0/Water Pollutants, Chemical; 7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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