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7.5.1
Review of Measurement Site Information
Review of Measurement Site Information before departing from the measurement site
is important to ensure that all associated Metadata is accurate. It is recommended that
the user verify each variable populated during the measurement process with the main
focus on the measurement site reference.
It is not good data management practice to leave both measurement site references
empty or with abbreviate terms. It is recommended that the user makes use of
accurate site descriptions.
7.5.2
Review Measurement Summary
Review Measurement Summary is the evaluation of the measurement results and if the
results are expected from the flow conditions present at the measurement site. There
are a number of variables that can be evaluated after the measurement is completed and
it is recommended that the following process is followed during the evaluation.
The evaluation of measurement results should be performed during the measurement
and the review of measurement summary is just an overview of what was already
identified during a measurement. It is recommended to repeat a point velocity or
station measurement if any of the data collected during a measurement are not
consistent with the flow conditions present.
a) Point velocity measurements with regard to mean velocity, standard error and
quality control reports correspond within a station measurement and adjacent
stations.
b) Station measurements with regard to location, depth, mean velocity and panel
discharge correspond to adjacent stations and what is expected from the flow
conditions.
c) The total width based on station locations does that correspond with the actual
width of the measurement section.
d) The total discharge, area and mean velocity measured is within the expected flow
conditions.
e) Review measurement results against historical measurements performed at the
measurement site during similar flow conditions and or staff gauge readings (if
available).
f) Review total discharge measured against discharge reading from developed
Stage - Discharge Relationship (if available). Most organizations use a 5% error
band to determine if the measurement results are within the required
measurement standards.
The review process is a key component of overall data quality and it is recommended
that this process be completed in the field directly after the measurement. Most
organizations supply their hydrographers or hydrologists a copy of hydrological
FlowTracker2 User's Manual (January 2019)
114
SonTek – a Xylem brand
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