The present paper describes the implementation of a numerical model to simulate groundwater flooding in the Polustrovo urban area of St. Petersburg (Russia), characterized by a moraine aquifer system. The main purposes are to determine the causes of groundwater flooding and to simulate some examples of engineering solutions. The study concerns (a) data collection and processing also by means of geostatistical analysis, (b) conceptual model elaboration and (c) implementation of a 3D groundwater flow model (design, execution and calibration) using MODFLOW code. Results point out a shallow flow system governed by topography and by groundwater-surface water interaction. All surface water bodies collect water from the shallow aquifer. Flow direction is mainly W/E in the northern part of the area and N/S in the southern part. Hydraulic gradient of shallow aquifer (average of 0.4%) varies depending on lithology distribution, whereas in the deep aquifer the gradient has a constant value of 0.3%. In the southern part of the area, deep aquifer has artesian condition. Flooding results in the southern zone of study area, according to field observation. Likely cause of flooding is the quick decrease of hydraulic conductivity along flow direction in the shallow aquifer, in addition to the decrease of soil surface elevation. The rising of deep groundwater under artesian condition in the zones where the aquitard is eroded can increase the intensity of flooding. Finally, the modeling indicates that a passive drainage system or a hydraulic barrier (pumping wells) could represent some engineering solutions of the flooding problem.

Rotiroti, M., Fumagalli, M., Bonomi, T. (2015). Numerical modeling of groundwater flooding in urban area: The case of polustrovo (st. petersburg, russia). In Engineering Geology for Society and Territory - Volume 3: River Basins, Reservoir Sedimentation and Water Resources (pp. 219-222). Springer International Publishing [10.1007/978-3-319-09054-2_44].

Numerical modeling of groundwater flooding in urban area: The case of polustrovo (st. petersburg, russia)

ROTIROTI, MARCO;FUMAGALLI, MARIA LETIZIA;BONOMI, TULLIA
2015

Abstract

The present paper describes the implementation of a numerical model to simulate groundwater flooding in the Polustrovo urban area of St. Petersburg (Russia), characterized by a moraine aquifer system. The main purposes are to determine the causes of groundwater flooding and to simulate some examples of engineering solutions. The study concerns (a) data collection and processing also by means of geostatistical analysis, (b) conceptual model elaboration and (c) implementation of a 3D groundwater flow model (design, execution and calibration) using MODFLOW code. Results point out a shallow flow system governed by topography and by groundwater-surface water interaction. All surface water bodies collect water from the shallow aquifer. Flow direction is mainly W/E in the northern part of the area and N/S in the southern part. Hydraulic gradient of shallow aquifer (average of 0.4%) varies depending on lithology distribution, whereas in the deep aquifer the gradient has a constant value of 0.3%. In the southern part of the area, deep aquifer has artesian condition. Flooding results in the southern zone of study area, according to field observation. Likely cause of flooding is the quick decrease of hydraulic conductivity along flow direction in the shallow aquifer, in addition to the decrease of soil surface elevation. The rising of deep groundwater under artesian condition in the zones where the aquitard is eroded can increase the intensity of flooding. Finally, the modeling indicates that a passive drainage system or a hydraulic barrier (pumping wells) could represent some engineering solutions of the flooding problem.
Capitolo o saggio
Groundwater Flooding; Modflow; Moraine Aquifer; St. Petersburg;
English
Engineering Geology for Society and Territory - Volume 3: River Basins, Reservoir Sedimentation and Water Resources
2015
9783319090535
3
Springer International Publishing
219
222
44
Rotiroti, M., Fumagalli, M., Bonomi, T. (2015). Numerical modeling of groundwater flooding in urban area: The case of polustrovo (st. petersburg, russia). In Engineering Geology for Society and Territory - Volume 3: River Basins, Reservoir Sedimentation and Water Resources (pp. 219-222). Springer International Publishing [10.1007/978-3-319-09054-2_44].
none
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/52689
Citazioni
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 0
Social impact