Abstract:
Technical requirements and economical impacts
of flow measurements in sewer systems are a issue concern in
today’s system’s management. Thus, the quality of the
measurements is considered to be a critical issue. Considering the
complex nature of the measurand and the metrological
requirements of local installations, the best available level of
accuracy in measurement results should be sought. Therefore, both
the knowledge of the measurand estimates and measurement of
uncertainties are required for achieving robust results.
Within this context, the quality of measurement results depends
on the knowledge of the uncertainty contributions and on the
selection of an appropriate method to evaluate the measurement
uncertainty. The study of these aspects can be of major importance
in providing information to management of the system, namely in
the selection of appropriate technology, upgrading and
maintenance activities.
The Monte Carlo method is used in this paper to carry out the
evaluation of the measurement uncertainty, considering its inherent
capacity to deal with non-linear and multi-stage mathematical
models. Influence of geometric conditions and other relevant
parameters in the quality of measurements is discussed. The study
was developed within the context of a specific sewer system, using
a particular measurement system, from which measurement data
was gathered.
