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Title: Concentration fluctuations and source identification in single and multiple dispersing plumes
Author: Nicolson , Alexander
ISNI:       0000 0004 5347 6643
Awarding Body: University of Surrey
Current Institution: University of Surrey
Date of Award: 2014
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The work described in this thesis was undertaken to support the development and application of Shell Global Solutions LightTouch oil and gas exploration technique, which uses inverse dispersion modelling to predict a plume's source location from atmospheric concentration measurements. The overall aim was to develop a better understanding of dispersion issues relevant to the interpretation of measurements from fixed and mobile sensors. This translated into understanding how dispersion models assisted this activity and, where appropriate, developing modelling capability. A LightTouch field trial, conducted in the Algerian Sahara is analysed. Concentration measurements, collected using a survey aircraft, revealed a complex, non-Gaussian plume structure. It is shown by the application of the Atmospheric Dispersion Modelling System (ADMS) that the data demonstrate an episodic release in the presence of an existing methane background. An accurate reconstruction of the observed behaviour is demonstrated.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available