| Title: | Modelling nitrogen pressure in river basins: A comparison between a statistical approach and the physically-based SWAT model |
| Authors: | Grizzetti, B., F. Bouraoui and G. De Marsily |
| Year: | 2005 |
| Journal: | Physics and Chemistry of the Earth |
| Volume (Issue): | 30(8-10) |
| Pages: | 508-517 |
| Article ID: | |
| DOI: | 10.1016/j.pce.2005.07.005 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic and pollutant |
| Primary Application Category: | model and/or data comparison |
| Secondary Application Category: | nitrogen cycling/loss and transport |
| Watershed Description: | 8900 km^2 drainage area including portions of the Great Ouse, Nene, Welland and Witham watersheds located in the East Anglia region, United Kingdom (the calibration watershed was a portion of the 1380 km^2 Great Ouse). |
| Calibration Summary: | Daily/monthly 1995-99 (at Bedford) E values: streamflow = .75/.86 TON = .24/.32 |
| Validation Summary: | Daily/monthly (1995-99) E values: Roxton: streamflow = .67/ .77 TON = .28/.38 Willen: streamflow = .45/.59 TON = .004/-.06 -------------------------- Annual (1995-99) for whole basin (50 subwatershed outlets): streamflow = .66 TON = .68 |
| General Comments: | Comparisons between SWAT and a statistical method based on the SPARROW approach are reported. The two approaches were found to be similar in statistical realibility and both estimated similar total oxidized nitrogen (TON) loads for the Roxon and Willen monitoring stations. The authors state that the statistical model should be viewed primarily as a screening tool and that SWAT is more useful for scenarios. |
| Language: | English |
| Keywords: | Statistical models; Physically-based models; Nitrogen load; Diffuse pollution; SWAT |