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http://hdl.handle.net/10773/18047
Title: | Assessing the impacts of sustainable agricultural practices for water quality improvements in the Vouga catchment (Portugal) using the SWAT model |
Author: | Rocha, João Roebeling, Peter Rial-Rivas, María Ermitas |
Keywords: | SWAT2009 SWAT-Cup calibration Sustainable agricultural practices N-NO3 export Crop yields |
Issue Date: | 2015 |
Publisher: | Elsevier |
Abstract: | The extensive use of fertilizers has become one of themost challenging environmental issues in agricultural catchment areas. In order to reduce the negative impacts fromagricultural activities and to accomplish the objectives of the European Water Framework Directive we must consider the implementation of sustainable agricultural practices. In this study, we assess sustainable agricultural practices based on reductions in N-fertilizer application rates (from 100% to 0%) and N-applicationmethods (single, split and slow-release) across key agricultural land use classes in the Vouga catchment, Portugal. The SWAT model was used to relate sustainable agricultural practices, agricultural yields and N-NO3 water pollution deliveries. Results show that crop yields as well as N-NO3 exportation rates decrease with reductions in N-application rates and single N-application methods lead to lower crop yields and higher N-NO3 exportation rates as compared to split and slow-release N-application methods. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/18047 |
DOI: | 10.1016/j.scitotenv.2015.07.038 |
ISSN: | 0048-9697 |
Appears in Collections: | CESAM - Artigos DAO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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1-s2.0-S0048969715303818-main.pdf | 2.02 MB | Adobe PDF |
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