Hydrogeological Model for the Prospective Underground Transport Tunnel Area in Riga, Latvia

Proceedings of 4th International Scientific Conference „Applied Information and Communication Technologies 2010” 2010
Aivars Spalviņš, Jānis Šlangens, Inta Lāce

The publication is devoted to numerical modeling of groundwater regime changes that may happen during and after building of the 7 km long and 50 metres deep underground transport tunnel in Riga. Two kinds of changes are expected: the ones caused by the tunnel impermeable body and by harmful effects that may happen during its construction. For example, the impact of open deep construction trenches. To estimate possible after effects caused by the tunnel and the trenches, the hydrogeological model has been created. By comparing results provided by the undisturbed (no tunnel) and disturbed models, the groundwater regime changes were found. They contained the ones for the groundwater heads and flows, for hydraulic gradients, for the meteoric infiltration. These changes were small and the tunnel itself should cause practically no disturbance of groundwater regimes. By modeling possible versions of watertight walls for trenches, it was found out that deep dry wrongly built trenches may cause considerable harm by lowering the groundwater table at their surroundings.

Keywords
hydrogeological models, underground tunnel

Spalviņš, A., Šlangens, J., Lāce, I. Hydrogeological Model for the Prospective Underground Transport Tunnel Area in Riga, Latvia. In: Proceedings of 4th International Scientific Conference „Applied Information and Communication Technologies 2010”, Latvia, Jelgava, 22-23 April, 2010. Jelgava: Latvia University of Agriculture, 2010, pp.60-68. ISBN 978-9984-48-022-0.

Publication language
English (en)