Modeling subsidence due to groundwater withdrawal
2 Institut für Angewandte Geowissenschaften, Fachgebiet Angewandte Geothermie, Technische Universität Darmstadt
P 14.4 in Urbane Hydrogeologie
Drawdown of the groundwater table due to extensive pumping can lead to land surface subsidence. At coastal locations drawdown can also result from a declining sea level. Especially in urban areas such a subsidence can have a severe impact (Zeitoun & Wakshal, 2013). Numerous groundwater flow and transport models are based on the software FEFLOW (Diersch 2014). Based on the so called Terzaghi (1943) approach a new software module has been developed which can be added to FEFLOW and which this way takes land subsidence due to groundwater drawdown into account. More advanced approaches like a full 3D mechanical coupling are also available (Rühaak et al., 2014). However, such an advanced approach is far more tedious while the simplified approach already can give sufficient results.
DIERSCH, H-J. (2014): Finite Element Modeling of Flow, Mass and Heat Transport in Porous and Fractured Media. Springer, Heidelberg Germany.
RÜHAAK, W.; BENSE, V.F., SASS, I. (2014): 3D hydro-mechanically coupled groundwater flow modelling of Pleistocene glaciation effects. Computers & Geosciences, 67: 89-99.
TERZAGHI, K. (1943): Theoretical Soil Mechanics. John Wiley, New York.
ZEITOUN, D.G., WAHSHAL, E., (2013): Land Subsidence Analysis in Urban Areas, Springer, Dordrecht.