| Abstract | Nitrogen and phosphorus retention estimates in streams and standing water bodies were compared for four European catchments by a series of catchment-scale modelling tools of different complexity, ranging from a simple, equilibrium input-output type to dynamic, physical-based models: source apportionment, MONERIS, EveNFlow, TRK, SWAT, and NL-CAT. The four catchments represent diverse climate, hydrology, and nutrient loads from diffuse and point sources in Norway, the UK, Italy, and the Czech Republic. The models' retention values varied largely, with tendencies towards higher scatters for phosphorus than for nitrogen, and for catchments with lakes (Vansjo-Hobol, Z. elivka) compared to mostly or entirely lakeless catchments (Ouse or Enza, respectively). A comparison of retention values with the size of nutrient sources showed that the modelled nutrient export from diffuse sources was directly proportional to retention estimates, hence implying that the uncertainty in quantification of diffuse catchment sources of nutrients was also related to the uncertainty in nutrient retention determination. This study demonstrates that realistic modelling of nutrient export from large catchments is very difficult without a certain level of measured data. In particular, even complex process oriented models require information on the retention capabilities of water bodies within the receiving surface water system and on the nutrient export from micro-catchments representing the major types of diffuse sources to surface waters. |
| Text | 42309 2009 10.1039/b901207a ISI Web of Science WOS 000264098400012 NUTRIENTS STREAMS RIVERS BASIN LAKES NITROGEN AND PHOSPHORUS RETENTION IN SURFACE WATERS AN INTER COMPARISON OF PREDICTION BY CATCHMENT MODELS OF DIFFERENT COMPLEXITY HEJZLAR J., ANTHONY S., ARHEIMER B., BEHRENDT H., BOURAOUI F., LO PORTO A., KRONVANG B Biology Centre AS CR, v.v.i, Institute of Hydrobiology, Ceske Budeojovice, Czech Republic ADAS Consulting Ltd, Wolverhampton, UK WV6 8TQ Swedish Meteorological and Hydrological Institute, Norrkeoping, Sweden FV IGB, MEURuggelseedamm 310, 12587 Berlin, Germany Joint Research Centre, Institute for Environment and Sustainability of Soil and Water Unit, Ispra, Italy Alterra, Environmental Sciences Group, Wageningen, the Netherlands Swedish University of Agricultural Sciences, Uppsala, Sweden ISRA CNR, Bari, Italy National Environmental Research Institute, Silkeborg, Denmark NTUA, Athens, Greece Nitrogen and phosphorus retention estimates in streams and standing water bodies were compared for four European catchments by a series of catchment scale modelling tools of different complexity, ranging from a simple, equilibrium input output type to dynamic, physical based models source apportionment, MONERIS, EveNFlow, TRK, SWAT, and NL CAT. The four catchments represent diverse climate, hydrology, and nutrient loads from diffuse and point sources in Norway, the UK, Italy, and the Czech Republic. The models retention values varied largely, with tendencies towards higher scatters for phosphorus than for nitrogen, and for catchments with lakes Vansjo Hobol, Z. elivka compared to mostly or entirely lakeless catchments Ouse or Enza, respectively . A comparison of retention values with the size of nutrient sources showed that the modelled nutrient export from diffuse sources was directly proportional to retention estimates, hence implying that the uncertainty in quantification of diffuse catchment sources of nutrients was also related to the uncertainty in nutrient retention determination. This study demonstrates that realistic modelling of nutrient export from large catchments is very difficult without a certain level of measured data. In particular, even complex process oriented models require information on the retention capabilities of water bodies within the receiving surface water system and on the nutrient export from micro catchments representing the major types of diffuse sources to surface waters. 11 3 Articolo pubblicato JEM_retention_surface_water.pdf Articolo in rivista Royal Society of Chemistry, 1464 0325 Journal of environmental monitoring Print Journal of environmental monitoring Print J. environ. monit. Print Journal of environmental monitoring Print JEM Cambridge. Print Print antonio.loporto LO PORTO ANTONIO TA.P04.005.006 Gestione a scala di bacino delle risorse idriche e sostenibilita dell uso irriguo in agricoltura |
