Abstract:
Technical and economical impacts of flow
measurements in sewer systems are a major 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
upgrading and maintenance activities.
This paper discusses the advantages of using Monte Carlo
method to perform the evaluation of the measurement uncertainty,
considering the non-linear and multi-stage nature of the
mathematical models adopted. The influence of geometric
conditions and other relevant parameters are considered in the
quality of measurements. The study was developed in the context
of a specific sewer system, using a particular measurement system,
from which measurement data was gathered.
