GENERAL ACOUSTICS GmbH © LOG_aFlow ® - the Hydrodynamic Software for Hydraulic Engineering and...
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Transcript of GENERAL ACOUSTICS GmbH © LOG_aFlow ® - the Hydrodynamic Software for Hydraulic Engineering and...
GENERAL ACOUSTICS GmbH©
LOG_aFlow® - the Hydrodynamic Softwarefor Hydraulic Engineering and Navigation
Remarks on Quality Assessment
General Acoustics GmbHAm Kiel-Kanal 124106 KielGermany
Phone: +49 431 5 80 81 [email protected]
GENERAL ACOUSTICS GmbH©
LOG_aFlow® - hydrodynamic ADCP – data interpolation in space and time
LOG_aFlow® - the main idea
I.) Challenge
synoptic view of the flow? whole area, fixed timesunsynchronised (ADCP)-data
II.) Setting up a physical model for interpolation
confining on layer-integrated velocities (2-D-approximation);
III.) Solution
synoptic view of the flow!!!time discrete description, whole investigation areaLOG_aFlow®
GENERAL ACOUSTICS GmbH©
conformity
quality and error-velocity at every depth-cell
LOG_aFlow® - prerequisites
checking and preparing ADCP – Data
check data for
continuity
Quality of interpolation results is mainly determined by the quality of ADCP - data
Therefore the quality of ADCP – data has to be checked for applicability of the data itself
ADCP – data have also to be checked for conformity with interpolation technology
RdiToLaf
GENERAL ACOUSTICS GmbH©
RdiToLaf: preprocessing of ADCP-data
Quality assessment of ADCP - data
GENERAL ACOUSTICS GmbH©
Quality assessment of ADCP - data
1st characteristic: data quality at every cell (quality, error velocity)
(device – dependent parameter)
adjustable thresholds for neglecting ‚bad‘ data
GENERAL ACOUSTICS GmbH©
Quality assessment of ADCP - data
2nd characteristic: - quality of the data ensemble
- data conformity and integrity with evaluation technology
(method– dependent parameter)
adjustable thresholds for marking of non-compliant data
From the example a question arise – Is it allowed to work with depth-integrated flow velocities or is it more realistic to work with layer-integrated flow velocities?
This decision has to be made by the user, always!
LOG_aFlow® and RdiToLaf assists the user to make this decision!!
GENERAL ACOUSTICS GmbH©
Conclusions
advice: depth-cell range integration
Attention for the data quality information (RdiToLaf)
Explore the layer-integrated data evaluation