Short Review

Abstract

The working hypothesis of this fine example of repeated gravity measurements is, that the mass loss accompanying the formation of cavities is measurable. The measurement campaign is carried out over four years (2014-2018) in a karst area in Germany affected by the formation of sinkholes and active ground subsidence. These bear a hazard to the buildings and infrastructure, as suddenly the roof of the cavities can collapse creating a hole of many meters depth and bringing down buildings or streets located above the cave. The subsidence is documented by a precise repeat levelling C1