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Modelling and managing critical source areas of diffuse pollution from agricultural land using flow connectivity simulation

Lookup NU author(s): Dr Paul Quinn, Dr Caspar HewettORCiD


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A combined critical source area and flow accumulation model is described that predicts the spatial distribution in the risk of diffuse nutrient losses from agricultural fields reaching surface waters. The model is applied to a number of agricultural fields under a range of different land management scenarios. The model output highlights the importance of land management features such as tramlines, tracks and field drains in concentrating flow towards receiving waters and in increasing the risk of the delivery of pollutants derived from diffuse agricultural sources to watercourses. The model allows scenario analysis of the likely impact of flow path mitigation on diffuse nutrient loads. © 2004 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Heathwaite AL, Quinn PF, Hewett CJM

Publication type: Article

Publication status: Published

Journal: Journal of Hydrology

Year: 2005

Volume: 304

Issue: 1-4

Pages: 446-461

ISSN (print): 0022-1694

ISSN (electronic):

Publisher: Elsevier BV


DOI: 10.1016/j.jhydrol.2004.07.043


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