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Simulation of nutrient reduction scenarios with three different models. Does the selection of model affect the recommended set of measures?

Simulation of nutrient reduction scenarios with three different models. Does the selection of model affect the recommended set of measures?
Simulation of nutrient reduction scenarios with three different models. Does the selection of model affect the recommended set of measures?
This article compares and discusses the results of applying three different models in order to quantify the phosphorus loads in Kapos catchment, Hungary. The models range from the very simple TEOTIL operating on statistical data and export coefficients, via the semi?complex INCA?P to the highly complex and process?based SWAT. All models have been calibrated with use of basically the same input and calibration data. The models have, to the extent they are capable, been used further to simulate a set of theoretical pollution reduction scenarios. The calibration results showed that all the models are basically able to simulate historical loads of TotP on a catchment level, except maybe those years with particularly high or low loads (INCA?P in 1999 and TEOTIL in 2002). The scenario analysis showed that the models are to a varying degree capable of simulating the simplified scenarios, where TEOTIL seems to a limited extent suitable for such analysis. This study demonstrated that the selection of model can influence the output of the scenario analysis significantly, and the selection of tool to be applied should therefore be made with great care. The most obvious example is the comparison of the simulation of the reduced runoff from area sources (scenario E) with the simulation of reduced discharges from point sources (scenario F). Based on the simulation results, TEOTIL considers reduction in nutrient runoff from areas to be the most efficient measures, while INCA?P and SWAT results would suggest focusing on the reduction of point?source discharges.
modelling, pollution reduction scenarios, nutrient runoff and discharges, management strategies
1571-5124
15-22
Bakken, Tor Haakon
d0abb38b-fce1-4c76-90a2-c50ffce8d61a
Szomolányi, Mária
dd8eafa0-6433-4a9d-a685-159b71039c09
Lázár, Attila N.
d7f835e7-1e3d-4742-b366-af19cf5fc881
Tjomsland, Torulv
f5ef7f59-c624-46d5-9c8a-98e0226bac5c
Borgvang, Stig A.
c470b8da-1be7-4c82-b850-a15810d2da91
Bakken, Tor Haakon
d0abb38b-fce1-4c76-90a2-c50ffce8d61a
Szomolányi, Mária
dd8eafa0-6433-4a9d-a685-159b71039c09
Lázár, Attila N.
d7f835e7-1e3d-4742-b366-af19cf5fc881
Tjomsland, Torulv
f5ef7f59-c624-46d5-9c8a-98e0226bac5c
Borgvang, Stig A.
c470b8da-1be7-4c82-b850-a15810d2da91

Bakken, Tor Haakon, Szomolányi, Mária, Lázár, Attila N., Tjomsland, Torulv and Borgvang, Stig A. (2009) Simulation of nutrient reduction scenarios with three different models. Does the selection of model affect the recommended set of measures? International Journal of River Basin Management, 7 (1), 15-22. (doi:10.1080/15715124.2009.9635366).

Record type: Article

Abstract

This article compares and discusses the results of applying three different models in order to quantify the phosphorus loads in Kapos catchment, Hungary. The models range from the very simple TEOTIL operating on statistical data and export coefficients, via the semi?complex INCA?P to the highly complex and process?based SWAT. All models have been calibrated with use of basically the same input and calibration data. The models have, to the extent they are capable, been used further to simulate a set of theoretical pollution reduction scenarios. The calibration results showed that all the models are basically able to simulate historical loads of TotP on a catchment level, except maybe those years with particularly high or low loads (INCA?P in 1999 and TEOTIL in 2002). The scenario analysis showed that the models are to a varying degree capable of simulating the simplified scenarios, where TEOTIL seems to a limited extent suitable for such analysis. This study demonstrated that the selection of model can influence the output of the scenario analysis significantly, and the selection of tool to be applied should therefore be made with great care. The most obvious example is the comparison of the simulation of the reduced runoff from area sources (scenario E) with the simulation of reduced discharges from point sources (scenario F). Based on the simulation results, TEOTIL considers reduction in nutrient runoff from areas to be the most efficient measures, while INCA?P and SWAT results would suggest focusing on the reduction of point?source discharges.

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More information

Published date: 2009
Keywords: modelling, pollution reduction scenarios, nutrient runoff and discharges, management strategies
Organisations: Civil Maritime & Env. Eng & Sci Unit

Identifiers

Local EPrints ID: 350086
URI: https://eprints.soton.ac.uk/id/eprint/350086
ISSN: 1571-5124
PURE UUID: f9cd7e74-903e-4aa0-9025-409fa876609b
ORCID for Attila N. Lázár: ORCID iD orcid.org/0000-0003-2033-2013

Catalogue record

Date deposited: 19 Mar 2013 12:44
Last modified: 06 Jun 2018 12:25

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