Subsidence Monitoring in Danish Coastal Cities
University of Copenhagen, DENMARK
The purpose of this study is to describe land subsidence in 3 danish coastal cities.
The first of the areas being studied is Copenhagen, the capital of Denmark and a major harbour city. Since there always is a lot of development and a lot of water flows through the oeresund strait I expect to see some subsidence due to development and erosion.
The second area is Esbjerg, which has it's harbour out toward to North Sea. The last area is Skagen, the northernmost part of Denmark. This area is mostly sand and the harbour is located eastern side of the peninsula. The subsidence monitoring will be done using Interferometric Synthetic Aperture Radar (InSAR). Using InSAR to produce a subsidence map is more common these days, since there is much more radar data available and it is fairly easy to obtain through the internet.
Creating a timeseries of InSAR data will show the surface displacement of a desired area between different image acquisition times. In this study the software package StaMPS was used to create to the subsidence maps using Single Looc Complex (SLC) image files from Eolisa. The final maps are then compared to subsidence maps created from GPS data from the same areas. The comparison will then determine how well InSAR does at subsidence monitoring in coastal cities.