Logo des Repositoriums

Auflistung nach Autor:in "Kollmitzer, Christian"

1 - 2 von 2
  • Konferenzbeitrag
    Near Real-Time Quality Assurance of Hydrological Measurements using Failsafe Data Transfer
    (Environmental Informatics and Industrial Environmental Protection: Concepts, Methods and Tools, 2009) Stadler, Hermann; Klock, Erich; Kollmitzer, Christian; Pindeus, Dietmar; Skritek, Paul
    Quality control (QC) of hydrological measurements also from remote measuring sites will be in the future a basic necessity in state of the art hydrological investigations. This will be of particular importance within quality assurance networks and early warning systems of drinking water supplies and all other tasks of sustainable water resource management. These systems heavily rely on on-line measurements and near real-time data transmission as well as automated plausibility tests in the run-up to the database in a Central Monitoring Station (CMS). To accept the great challenge of "real-time" verification of the quality of the measurements, which is very important for the supply of consumers with high quality uncontaminated drinking water, according to the European Water Framework Directive (European Parliament, 2000), we have established a bidirectional, dual wireless communication structure, combining GSM/GPRS data transfer with LEO-Satellite communication. In this way we obtain a failsafe data link from the spring in the remote area to the CMS. The data logger as the remote control unit manages the use of the two possible communication media. If available, the GSM/GPRS communication is used, otherwise the LEO-Satellite link is activated. This is necessary, because the small scale terrestrial communication structure of the cell-phone-networks are often impaired by local events like thunderstorms and floods. But especially during these times it is crucial to achieve information of the reaction of the spring. Therefore our system is a contribution to an integrated Quality Management Tool, which allows retracing the complete chain of generation of the measuring values.
  • Konferenzbeitrag
    New Methods including Picture Processing for Hydro-Meteorological On-Line Data Acquisition
    (Environmental Informatics and Systems Research, 2007) Kollmitzer, Christian; Skritek, Paul; Woletz, Kurt; Stadler, Hermann
    Early warning systems, quality control networks and sustainable protection of drinking water resources became more and more important as a main task of water resources management. They heavily rely on on-line measurements, which mostly are automated. Nevertheless the quality of the measured data can be increased by an integrated Quality Management System, including also the field measurement devices into a complete chain of quality traceability. To increase the data reliability alternative measuring methods have to be evaluated. In our prototype development staff gauge images are digitally processed to achieve a second value for the actual water-level. If the both detected water levels are different, an alarm is generated or remote configuration procedures are performed. The system is a contribution to an integrated Quality Management Tool, allowing retracing the complete chain of measuring value acquisition. Low Earth Orbit Satellites then allow worldwide “nomadic” on-line data-communication from otherwise inaccessible regions. Their combination with plausibility tests in the run-up to the database enables us to accept the great challenge of "real-time" supervision of the quality of the measurements.