Gain control of the groundwater
Groundwater represents an important parameter in the geotechnical engineering. The groundwater level has a major influence on material behavior (drained-undrained), and changes in groundwater level can result in settlements and damage to buildings and infrastructure. An artesian pore pressure, or excess pore pressure in the ground, will of course have a major impact on the material behavior and stability.
Groundwater is an important resource, even though in most of the larger Norwegian water works use surface water as a raw water source. In transportation projects cuts and terrain changes may affect groundwater level in such a way that it causes changes in the vegetation and the quantity and quality of drinking water in private groundwater wells in adjacent areas.
Human activity can also result in the infiltration of pollution to groundwater, and thereby result in an increased spread resulting from groundwater movement. Knowledge of different substances chemical properties in combination with hydrogeological expertise is essential in order to provide a realistic assessment of the associated risks.
In many of NGI's projects hydrogeology is one of several professional aspects to be considered, while it sometimes is the main focus.
- infiltration wells and online monitoring
- hydrogeological field methods and groundwater mapping
- groundwater flow and ground pollution transport
- management of groundwater level in connection with ground works and construction projects
Research and development
- groundwater monitoring and modeling at Gardermoen airport, with a focus on the spread of the PFAS (per- and polyfluoriaed alkyl substances)
- hydrogeological issues related to drainage and settlement around excavations (see the project BegrensSkade)
- new model for the spread of pollution in marine deposits in urban and industrial areas