Memorias de investigación
Ponencias en congresos:
Improving the low-wind performance of the AERMOD atmospheric dispersion model for predicting short-range impacts of livestock ammonia emissions.
Año:2013
Áreas de investigación
  • Ciencias naturales y ciencias de la salud
Datos
Descripción
Short-range impacts to sensitive ecosystems as a result of ammonia emitted by livestock farms are often assessed using atmospheric dispersion modelling systems such as AERMOD. These assessments evaluate mean annual atmospheric concentrations of ammonia and nitrogen deposition rates at the ecosystem location for comparison with ecosystem damage thresholds. However, predictions of mean annual atmospheric concentrations can be dominated by periods of stable night-time conditions, which can contribute significantly to mean concentrations. AERMOD has been demonstrated to overestimate concentrations in certain stable low-wind conditions and so the model could potentially overestimate the short-range impacts of livestock ammonia emissions. This paper tests several modifications to the parameterisation of AERMOD (v12345) that aim to improve model predictions in low-wind conditions. The modifications are first described and then are applied to three pig farm case studies in the USA, Denmark and Spain to assess whether the modifications improve long-term mean ammonia concentration predictions through improved model performance. For these three case studies, most of the modifications tested improved model performance as a result of reducing the long-term mean concentration predictions, with the largest effect for low- or ground-level sources (e.g. slurry lagoons or naturally ventilated housing).
Internacional
Si
Nombre congreso
15th Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes
Tipo de participación
960
Lugar del congreso
Madrid, Spain
Revisores
Si
ISBN o ISSN
978-84-7353-695-0
DOI
Fecha inicio congreso
06/05/2013
Fecha fin congreso
09/05/2013
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4
Título de las actas
Proceedings of 15th conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Madrid, Spain
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Contaminación de agroecosistemas por las prácticas agrícolas