## 5 Conclusions  
Based on the results of the model solution presented in this paper, it can be concluded that the planned construction of the TEN-T railway connection between the airport on the left side of the Danube River through the city center on the other side of the Danube to the Petrzalka region will have varying impacts on the groundwater level regime in the area. Although there will be an increase in the groundwater level regime on the left side of the Danube River, it can be controlled by designing openings in a sealing wall, as proposed by the model. However, no significant impact was observed to the groundwater level regime on the right side of the Danube River in the Petrzalka region, and therefore, no additional measures were proposed.  
The presented model solution provides valuable information on the potential impacts of the planned construction on the groundwater level regime in the area, and it suggests measures that can be taken to mitigate any adverse effects. The findings of this study are expected to inform decision-making processes on the construction of the TEN-T railway connection and contribute to the development of sustainable infrastructure in the region. Through a thorough analysis of the impacts of the proposed railway line on the groundwater, we developed a solution model that allows for more accurate predictions of the fluctuations in the groundwater levels along the track. This model also provides valuable information about the potential adverse effects and options for mitigation. Specifically, by implementing openings above the railway, we successfully predicted an increase in the level of protection of the surrounding area of the planned railway line by lowering the groundwater level on the western side of the track and increasing it on the eastern side. These findings have significant implications for the decision-making processes and will contribute to the development of sustainable infrastructure. Our study expands knowledge in the field of managing and designing measures to minimize risks and enhance the safety of the railway project.  
**Author Contributions:** Conceptualization, D.B. and A.S.; methodology, D.B. and A.S.; software, D.B.; validation, D.B.; formal analysis, A.S., D.B. and M.C.; investigation, D.B. and A.S.; resources, M.C. and D.B.; data curation, M.C. and D.B.; writing--original draft preparation, A.S., D.B. and M.C.; writing--review and editing, A.S., D.B. and M.C.; visualization, D.B. and M.C.; supervision, A.S.; project administration, A.S. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research received no external funding.  
**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.  
**Acknowledgments:** The contribution was developed within the framework, and was based on the financial support, of the APVV-19-0383 project \"Natural and technical measures oriented to water retention in sub-mountain watersheds of Slovakia\", as well as the VEGA project No. 1/0728/21 \"Analysis and prognosis of the impact of construction activities on groundwater in urbanized territory\". The authors would like to express their sincere appreciation to the reviewers for their invaluable comments, which helped address any shortcomings and improve the paper's quality, ensuring the intended meaning is retained.  
**Conflicts of Interest:** The authors declare no conflict of interest.