Articles | Volume 8, issue 12
Geosci. Model Dev., 8, 4045–4067, 2015
Geosci. Model Dev., 8, 4045–4067, 2015

Model description paper 21 Dec 2015

Model description paper | 21 Dec 2015

Coupling global models for hydrology and nutrient loading to simulate nitrogen and phosphorus retention in surface water – description of IMAGE–GNM and analysis of performance

A. H. W. Beusen et al.

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Short summary
The IMAGE-Global Nutrient Model (GNM) is used to study the impact of multiple environmental changes on N and P delivery to surface water and transport and in-stream retention in rivers, lakes, wetlands and reservoirs over prolonged time periods. N and P are delivered to water bodies via diffuse sources (agriculture and natural ecosystems) and wastewater. N and P retention in a water body is calculated on the basis of the residence time of the water and nutrient uptake velocity.