Spatial Data Management

Mapping ground subsidence

Ground subsidence is of global concern. Pumping of groundwater and the extraction gas and petroleum of water and natural resources leads to subsidence varying from centimeters to meters. Because the subsidence can differ per location, damage is caused to infrastructure such as roads, homes, cables and pipelines. Information about subsidence is key to identify so actions can be taken to prevent damage to the infrastructure. Land subsidence measurements with Satellite Radar Interferometry (InSAR) are available with mini-meter accuracy. InSAR measurements have been performed and available for more then a decade now. In the Netherlands InSAR data from 2015 to recent is available  as open data files via the National Georegister and Rijkswaterstaat.

GeolinQ is able to store and visualize InSAR measurements via maps. In additionInSAR measurements can be processed to information products.

Mapping subsidence

InSAR measurements are performed by satellites such as the Sentinel-1 on a weekly base. The InSAR measurements are processed into subsidence data by specialist parties such as Sensar and Skygeo. With GeolinQ, these processed measurements can be accessed via the map. The changes in the soil height of an area in a period of time can easily be made clear with a time-slider in the map.

Charts and trend analysis

By visualizing the InSAR measurements in a graph the ground subsidence at a location during a period of time is immediately clear.

For trend analysis a trend line can be plotted in the graph. The time component and order of the polynomial of the trend analysis are adjustable.

Relating subsidence to infrastructure

Determine the infrastructure objects that may be at risk of damage due to subsidence. In GeolinQ the locations with large subsidence differences can be intersected with the locations of infrastructure objects. The result are infrastructure objects, such as roads, houses, cables and pipelines, at locations with large subsidence can be visualized on a map. On the basis of this information, further research can be conducted and measures may be taken to prevent damage to the infrastructure as much as possible.

Visualize subsidence and the effects on the infrastructure with GeolinQ.

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