SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Using the Soil and Water Assessment Tool to estimate dissolved inorganic nitrogen water pollution abatement cost functions in central Portugal 
Authors:Roebeling, P.C., J. Rocha, J.P. Nunes, T. Fidelis, H. Aves and S. Fonseca 
Journal:Journal of Environmental Quality 
Volume (Issue):43(1) 
Article ID: 
URL (non-DOI journals): 
Broad Application Category:pollutant only 
Primary Application Category:economic and or cost/benefit assessment 
Secondary Application Category:pollutant cycling/loss and transport 
Watershed Description:3,685.45 km^2 Vouga River in central Portugal 
Calibration Summary: 
Validation Summary: 
General Comments:This article is part of a JEQ special SWAT section. 
Abstract:Coastal aquatic ecosystems are increasingly affected by diffuse source nutrient water pollution from agricultural activities in coastal catchments, even though these ecosystems are important from a social, environmental and economic perspective. To warrant sustainable economic development of coastal regions we need to balance marginal costs from coastal catchment water pollution abatement and associated marginal benefits from coastal resource appreciation. Diffuse-source water pollution abatement costs across agricultural sectors are, however, not easily determined given the spatial heterogeneity in bio-physical and agro-ecological conditions as well as the available range of best agricultural practices (BAPs) for water quality improvement. We demonstrate how the Soil and Water Assessment Tool (SWAT) can be used to estimate diffuse-source water pollution abatement cost functions across agricultural land use categories – based on a stepwise adoption of identified BAPs for water quality improvement and, corresponding, SWAT-based estimates for agricultural production, agricultural incomes, and water pollution deliveries. Results for the case of Dissolved Inorganic Nitrogen (DIN) surface water pollution by the key agricultural land use categories (‘annual crops’, ‘vineyards’ and ‘mixed annual crops & vineyards’) in the Vouga catchment (Central Portugal), show that no win-win agricultural practices are available within the assessed BAPs for DIN water quality improvement. Estimated abatement costs increase quadratically in the rate of water pollution abatement, with largest abatement costs for the ‘mixed annual crops & vineyards’ land use category (between 41 900 € tDIN-1 yr-1 and 51 900 € tDIN-1 yr-1), and fairly similar abatement costs across the ‘vineyards’ and ‘annual crops’ land use categories (between 7 300 € tDIN-1 yr-1 and 15 200 € tDIN-1 yr-1).