Modelling the dynamical effect of solar radiation on the oxygen content of a small creek

✍ Scribed by Judith L. Jacobsen; Henrik Madsen; Poul Harremoës

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 180 KB
• Volume: 9
• Category: Article
• ISSN: 1180-4009
• DOI: 10.1002/(sici)1099-095x(199801/02)9:1<3::aid-env281>3.0.co;2-2

✦ Synopsis

Data from a small stream are used to explore various dynamical models of the oxygen level. Special attention is given to an analysis and a description of how the solar radiation aects the oxygen level. The models are formulated in continuous time using stochastic dierential equations. The parameters of the models are estimated using discrete time data and a maximum likelihood method. The continuous time formulation makes it possible to directly interpret the parameters of the model, as the estimated parameters have speci®c physical, biological or chemical meaning. The advantages of using a low pass ®lter on the point measured solar radiation, as an input variable, are demonstrated. This investigation will eventually contribute to a comprehensive study of the dynamics that governs the oxygen content in a recipient.