Accessibility navigation


Evaluating the risk of non-point source pollution from biosolids: integrated modelling of nutrient losses at field and catchment scales

Whitehead, P., Heathwaite, A. L., Flynn, N. J., Wade, A. J. and Quinn, P. F. (2007) Evaluating the risk of non-point source pollution from biosolids: integrated modelling of nutrient losses at field and catchment scales. Hydrology and Earth System Sciences, 11 (1). pp. 601-613. ISSN 1027-5606

Full text not archived in this repository.

Abstract/Summary

A semi-distributed model, INCA, has been developed to determine the fate and distribution of nutrients in terrestrial and aquatic systems. The model simulates nitrogen and phosphorus processes in soils, groundwaters and river systems and can be applied in a semi-distributed manner at a range of scales. In this study, the model has been applied at field to sub-catchment to whole catchment scale to evaluate the behaviour of biosolid-derived losses of P in agricultural systems. It is shown that process-based models such as INCA, applied at a wide range of scales, reproduce field and catchment behaviour satisfactorily. The INCA model can also be used to generate generic information for risk assessment. By adjusting three key variables: biosolid application rates, the hydrological connectivity of the catchment and the initial P-status of the soils within the model, a matrix of P loss rates can be generated to evaluate the behaviour of the model and, hence, of the catchment system. The results, which indicate the sensitivity of the catchment to flow paths, to application rates and to initial soil conditions, have been incorporated into a Nutrient Export Risk Matrix (NERM).

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Archaeology, Geography and Environmental Science > Department of Geography and Environmental Science
Faculty of Science > School of Archaeology, Geography and Environmental Science
Faculty of Science > School of Archaeology, Geography and Environmental Science > Earth Systems Science
ID Code:4230
Uncontrolled Keywords:modelling water quality biosolids sludge nitrogen phosphorus water quality River Lee River Thames River Stort nutrient risk model MULTIPLE SOURCE ASSESSMENT LAND-USE CHANGE NITROGEN MODEL WATER-QUALITY DIFFUSE POLLUTION AGRICULTURAL LAND INCA PHOSPHORUS EQUATIONS DYNAMICS
Additional Information:
Publisher:Copernicus

Centaur Editors: Update this record

Page navigation