Peña Haro, S.; Pulido-Velazquez, M.; Sahuquillo Herráiz, A. (2009). A hydro-economic modelling framework for optimal management of groundwater nitrate pollution from agriculture. Journal of Hydrology. 373(1-2):193-203. doi:10.1016/j.jhydrol.2009.04.024
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/63686
Title:
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A hydro-economic modelling framework for optimal management of groundwater nitrate pollution from agriculture
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Author:
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Peña Haro, Salvador
Pulido-Velazquez, M.
Sahuquillo Herráiz, Andrés
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UPV Unit:
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Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient
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Issued date:
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Abstract:
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A hydro-economic modelling framework is developed for determining optimal management of groundwater nitrate pollution from agriculture. A holistic optimization model determines the spatial and temporal fertilizer application ...[+]
A hydro-economic modelling framework is developed for determining optimal management of groundwater nitrate pollution from agriculture. A holistic optimization model determines the spatial and temporal fertilizer application rate that maximizes the net benefits in agriculture constrained by the quality requirements in groundwater at various control sites. Since emissions (nitrogen loading rates) are what can be controlled, but the concentrations are the policy targets, we need to relate both. Agronomic simulations are used to obtain the nitrate leached, while numerical groundwater flow and solute transport simulation models were used to develop unit source solutions that were assembled into a pollutant concentration response matrix. The integration of the response matrix in the constraints of the management model allows simulating by superposition the evolution of groundwater nitrate concentration over time at different points of interest throughout the aquifer resulting from multiple pollutant sources distributed over time and space. In this way, the modelling framework relates the fertilizer loads with the nitrate concentration at the control sites. The benefits in agriculture were determined through crop prices and crop production functions. This research aims to contribute to the ongoing policy process in the Europe Union (the Water Framework Directive) providing a tool for analyzing the opportunity cost of measures for reducing nitrogen loadings and assessing their effectiveness for maintaining groundwater nitrate concentration within the target levels. The management model was applied to a hypothetical groundwater system. Optimal solutions of fertilizer use to problems with different initial conditions, planning horizons, and recovery times were determined. The illustrative example shows the importance of the location of the pollution sources in relation to the control sites, and how both the selected planning horizon and the target recovery time can strongly influence the limitation of fertilizer use and the economic opportunity cost for meeting the environmental standards. There is clearly a trade-off between the time horizon to reach the standards (recovery time) and the economic losses from nitrogen use reductions. (C) 2009 Elsevier B.V. All rights reserved.
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Subjects:
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Nitrogen management
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Diffuse groundwater pollution
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Hydro-economic modelling
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Optimization
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Water Framework Directive
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Copyrigths:
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Reserva de todos los derechos
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Source:
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Journal of Hydrology. (issn:
0022-1694
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DOI:
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10.1016/j.jhydrol.2009.04.024
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Publisher:
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Elsevier
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Publisher version:
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http://dx.doi.org/10.1016/j.jhydrol.2009.04.024
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Thanks:
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The authors thank the Editor, Geoff Syme, and two anonymous reviewers for their detailed and helpful comments on improving the paper. Support for this research was provided by the Mexican Ministry of Science and Technology ...[+]
The authors thank the Editor, Geoff Syme, and two anonymous reviewers for their detailed and helpful comments on improving the paper. Support for this research was provided by the Mexican Ministry of Science and Technology (CONACyT).
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Type:
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Artículo
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