N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model
Nitrous oxide (N<sub>2</sub>O) is a potent greenhouse gas stemming mainly from nitrogen (N)-fertilizer application. It is challenging to quantify N<sub>2</sub>O emissions from agroecosystems because of the dearth of measured data and high spatial variability of the emissions....
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/1/50 |
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| author | Cong Wang Christoph Schürz Ottavia Zoboli Matthias Zessner Karsten Schulz Andrea Watzinger Gernot Bodner Bano Mehdi-Schulz |
| author_facet | Cong Wang Christoph Schürz Ottavia Zoboli Matthias Zessner Karsten Schulz Andrea Watzinger Gernot Bodner Bano Mehdi-Schulz |
| author_sort | Cong Wang |
| collection | DOAJ |
| description | Nitrous oxide (N<sub>2</sub>O) is a potent greenhouse gas stemming mainly from nitrogen (N)-fertilizer application. It is challenging to quantify N<sub>2</sub>O emissions from agroecosystems because of the dearth of measured data and high spatial variability of the emissions. The eco-hydrological model SWAT (Soil and Water Assessment Tool) simulates hydrological processes and N fluxes in a catchment. However, the routine for simulating N<sub>2</sub>O emissions is still missing in the SWAT model. A submodule was developed based on the outputs of the SWAT model to partition N<sub>2</sub>O from the simulated nitrification by applying a coefficient (K<sub>2</sub>) and also to isolate N<sub>2</sub>O from the simulated denitrification (N<sub>2</sub>O + N<sub>2</sub>) with a modified semi-empirical equation. The submodule was applied to quantify N<sub>2</sub>O emissions and N<sub>2</sub>O emission factors from selected crops in two agricultural catchments by using NH<sub>4</sub>NO<sub>3</sub> fertilizer and the combination of organic N and NO<sub>3</sub><sup>−</sup> fertilizer as N input data. The setup with the combination of organic N and NO<sub>3</sub><sup>−</sup> fertilizer simulated lower N<sub>2</sub>O emissions than the setup with NH<sub>4</sub>NO<sub>3</sub> fertilizer. When the water balance was simulated well (absolute percentage error <11%), the impact of N fertilizer application on the simulated N<sub>2</sub>O emissions was captured. More research to test the submodule with measured data is needed. |
| first_indexed | 2024-03-10T01:56:08Z |
| format | Article |
| id | doaj.art-96246129d6bb46eebd69df740b40d9b8 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T01:56:08Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-96246129d6bb46eebd69df740b40d9b82023-11-23T12:56:20ZengMDPI AGAtmosphere2073-44332021-12-011315010.3390/atmos13010050N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT ModelCong Wang0Christoph Schürz1Ottavia Zoboli2Matthias Zessner3Karsten Schulz4Andrea Watzinger5Gernot Bodner6Bano Mehdi-Schulz7Institute for Hydrology and Water Management, Department of Water, Atmosphere and Environment, University of Natural Resources & Life Science, 1190 Vienna, AustriaInstitute for Hydrology and Water Management, Department of Water, Atmosphere and Environment, University of Natural Resources & Life Science, 1190 Vienna, AustriaInstitute for Water Quality and Resource Management, TU Wien, 1040 Vienna, AustriaInstitute for Water Quality and Resource Management, TU Wien, 1040 Vienna, AustriaInstitute for Hydrology and Water Management, Department of Water, Atmosphere and Environment, University of Natural Resources & Life Science, 1190 Vienna, AustriaInstitute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources & Life Science, 3430 Tulln an der Donau, AustriaInstitute of Agronomy, Department of Crop Science, University of Natural Resources & Life Science, 3430 Tulln an der Donau, AustriaInstitute for Hydrology and Water Management, Department of Water, Atmosphere and Environment, University of Natural Resources & Life Science, 1190 Vienna, AustriaNitrous oxide (N<sub>2</sub>O) is a potent greenhouse gas stemming mainly from nitrogen (N)-fertilizer application. It is challenging to quantify N<sub>2</sub>O emissions from agroecosystems because of the dearth of measured data and high spatial variability of the emissions. The eco-hydrological model SWAT (Soil and Water Assessment Tool) simulates hydrological processes and N fluxes in a catchment. However, the routine for simulating N<sub>2</sub>O emissions is still missing in the SWAT model. A submodule was developed based on the outputs of the SWAT model to partition N<sub>2</sub>O from the simulated nitrification by applying a coefficient (K<sub>2</sub>) and also to isolate N<sub>2</sub>O from the simulated denitrification (N<sub>2</sub>O + N<sub>2</sub>) with a modified semi-empirical equation. The submodule was applied to quantify N<sub>2</sub>O emissions and N<sub>2</sub>O emission factors from selected crops in two agricultural catchments by using NH<sub>4</sub>NO<sub>3</sub> fertilizer and the combination of organic N and NO<sub>3</sub><sup>−</sup> fertilizer as N input data. The setup with the combination of organic N and NO<sub>3</sub><sup>−</sup> fertilizer simulated lower N<sub>2</sub>O emissions than the setup with NH<sub>4</sub>NO<sub>3</sub> fertilizer. When the water balance was simulated well (absolute percentage error <11%), the impact of N fertilizer application on the simulated N<sub>2</sub>O emissions was captured. More research to test the submodule with measured data is needed.https://www.mdpi.com/2073-4433/13/1/50SWATN<sub>2</sub>O submoduleN<sub>2</sub>O emission factoragricultural catchmentsmodel performance |
| spellingShingle | Cong Wang Christoph Schürz Ottavia Zoboli Matthias Zessner Karsten Schulz Andrea Watzinger Gernot Bodner Bano Mehdi-Schulz N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model Atmosphere SWAT N<sub>2</sub>O submodule N<sub>2</sub>O emission factor agricultural catchments model performance |
| title | N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model |
| title_full | N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model |
| title_fullStr | N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model |
| title_full_unstemmed | N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model |
| title_short | N<sub>2</sub>O Emissions from Two Austrian Agricultural Catchments Simulated with an N<sub>2</sub>O Submodule Developed for the SWAT Model |
| title_sort | n sub 2 sub o emissions from two austrian agricultural catchments simulated with an n sub 2 sub o submodule developed for the swat model |
| topic | SWAT N<sub>2</sub>O submodule N<sub>2</sub>O emission factor agricultural catchments model performance |
| url | https://www.mdpi.com/2073-4433/13/1/50 |
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