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POLLUTION SOURCES LOCALISATION IN URBAN SEWER SYSTEMS.
Abstract
Nowadays a typical task in water quality modelling is to simulate the pollution spreading downstream, i.e. initial and boundary conditions are known. However, in practice opposite problems may occur: pollution concentration time courses in specific locations are known (e.g. based on the on-line monitoring), but the position of the pollution source is unknown. This type of task can occur in case of accidental pollution and is named as an inverse task. Particular importance has the inverse task application in urban environment - in sewer systems. Inverse task can be solved by water quality monitoring in different sewer profiles, based on simple presence of the monitored pollutant. An interesting approach to solve the inverse task is to monitor the hydrodynamic dispersion in sewer system, assuming discontinuous and instantaneous pollution sources (similar to a single toilet flush). A unique pollution source identification in sewer systems is very unlikely because of the sewer system tree structure and its branching, but result of inverse task can be a selection of regions with high probability of source location. Such approach can help to monitor and localise human activities in urban environment.
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References11
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