Use of groundwater modelling to quantitative evidence preservation for BOKU’s hydraulic engineering research channel Nußdorf | Einsatz der Grundwassermodellierung zur Unterstützung der quantitativen Beweissicherung beim Bau des BOKU-Forschungsgerinnes Nußdorf
2019
Mayr, Ernest | Handl, Sebastian | Perfler, Reinhard
The University of Natural Resources and Life Sciences Vienna has established a research channel for hydraulic engineering purposes at Vienna 19 (Nußdorf), Am Brigittenauer Sporn, with the withdrawal of water from river Danube at flow-km 1933.350 and the return to the Danube Canal at DK-km 0.500. Parts of the respective facilities are located within the protected zone III/2 of the Nußdorf Waterworks dedicated to the protection of groundwater resources. The present article aims to investigate and document effects of the research channel on the groundwater resources. The validation of specific effects of the construction activities on the quantitative groundwater conditions according to official note is carried out by means of two pumping tests. In order to visualize the effect of the channel on the groundwater regime, effects of colmation and temperature on the target parameter well depression have to be eliminated. For this purpose, a numerical groundwater model was compiled to improve the evaluation of the two pumping tests between the scenarios with and without consideration of cross section reduction. The results show that the effects of the channel structure are below the accuracy of the model adaptation to observations due to their low severity in both the water level and the inflow rate. It is therefore assumed that the quantitative flow of groundwater from the Brunnenfeld Nußdorf is not influenced by the research channel.
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