Ger de Lange

Senior Engineering Geologist; expert on land subsidence, earthquake hazard, marine engineering geology

+31(0)88335 7865 LinkedIn profile

Ger de Lange is working as expert in the interpretation and application of geological and geotechnical information for national and international civil engineering. On the subject of land subsidence, his experience includes the construction of nationwide subsidence prediction maps for the Netherlands, and subsidence studies of Ho Chi Minh City, Vietnam and Jakarta, Indonesia.
Ger is a member of the IUGG national commission for Land Subsidence and Sea Level Fluctuations and from November 2014 of the UNESCO Working Group on Land Subsidence. Ger conducted research and worked on projects on regional subsidence and water management, artificial ground freezing, open pit mine stability and nuclear waste disposal. Ger developed a subsidence modeling tool incorporating time dependent processes, which has been modified at Deltares to interact with the MODFLOW hydrological models. Recently Ger worked on the hazard analysis of induced earthquakes in the Groningen Gas Field. Ger was co-developer of the Climate Adaptation Toolkit, a guideline for regional and local authorities in the implementation of climate adaptation measures.
Ger authored and co-authored papers on land subsidence, on stochastic modelling of heave risk in excavations, on nuclear waste disposal in Tertiary clays, and on artificial ground freezing.

Working experience

2010-present Deltares Senior Engineering Geologist/Consultant, subsidence expert
1997-2010 TNO, the Netherlands Senior Engineering Geologist/Consultant, Geo-Infrastructure and Geo-Observation Team
1992-1997 GeoDelft, the Netherlands Senior Engineering Geologist
1991-1992 Ballast Nedam Group, Saudi Arabia Senior Geotechnical Project Manager
1981-1991 Fugro, the Netherlands Engineering Geologist