Details
| Original language | English |
|---|---|
| Title of host publication | Conference Proceedings |
| Subtitle of host publication | 25th European Meeting of Environmental and Engineering Geophysics |
| Pages | 1-5 |
| Number of pages | 5 |
| Volume | 2019 |
| Publication status | Published - 2019 |
| Event | 25th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2019, NSG 2019 - The Hague, Netherlands Duration: 8 Sept 2019 → 12 Sept 2019 |
Abstract
Subrosion is a geological process, which occurs worldwide. In extreme cases, it leads to the development of collapse sinkholes, which can pose a severe hazard, especially in urban areas. Hence, concepts are required to monitor the processes, which are related to subrosion. In two case studies we show the feasibility and the success of an approach that combines repeated levelling and time-lapse gravity surveys in the subrosion-prone urban areas of Bad Frankenhausen and Hamburg-Flottbek in Germany. Over several years of observation, in which quarterly measurement campaigns were carried out, we found both evidence of ongoing subsidence and mass redistribution in the subsurface. Especially for the known sinkhole areas, a decrease of gravity in the order of up to 2 μGal·a-1 suggests ongoing underground leaching and mass loss at both locations. In the context of data processing, we successfully applied a correction of the effects of varying soil water content on the adjusted gravity differences using the global model GLDAS Noah.
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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Conference Proceedings: 25th European Meeting of Environmental and Engineering Geophysics. Vol. 2019 2019. p. 1-5.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Monitoring of subrosion induced mass changes by time-lapse gravity surveys
T2 - 25th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2019, NSG 2019
AU - Gabriel, Gerald
AU - Kobe, Martin
AU - Weise, Adelheid
AU - Timmen, Ludger
N1 - Funding information: The work is part of the project SIMULTAN funded by the Federal Ministry for Education and Research (BMBF, grant no. 03G0843A), which is gratefully acknowledged.
PY - 2019
Y1 - 2019
N2 - Subrosion is a geological process, which occurs worldwide. In extreme cases, it leads to the development of collapse sinkholes, which can pose a severe hazard, especially in urban areas. Hence, concepts are required to monitor the processes, which are related to subrosion. In two case studies we show the feasibility and the success of an approach that combines repeated levelling and time-lapse gravity surveys in the subrosion-prone urban areas of Bad Frankenhausen and Hamburg-Flottbek in Germany. Over several years of observation, in which quarterly measurement campaigns were carried out, we found both evidence of ongoing subsidence and mass redistribution in the subsurface. Especially for the known sinkhole areas, a decrease of gravity in the order of up to 2 μGal·a-1 suggests ongoing underground leaching and mass loss at both locations. In the context of data processing, we successfully applied a correction of the effects of varying soil water content on the adjusted gravity differences using the global model GLDAS Noah.
AB - Subrosion is a geological process, which occurs worldwide. In extreme cases, it leads to the development of collapse sinkholes, which can pose a severe hazard, especially in urban areas. Hence, concepts are required to monitor the processes, which are related to subrosion. In two case studies we show the feasibility and the success of an approach that combines repeated levelling and time-lapse gravity surveys in the subrosion-prone urban areas of Bad Frankenhausen and Hamburg-Flottbek in Germany. Over several years of observation, in which quarterly measurement campaigns were carried out, we found both evidence of ongoing subsidence and mass redistribution in the subsurface. Especially for the known sinkhole areas, a decrease of gravity in the order of up to 2 μGal·a-1 suggests ongoing underground leaching and mass loss at both locations. In the context of data processing, we successfully applied a correction of the effects of varying soil water content on the adjusted gravity differences using the global model GLDAS Noah.
UR - http://www.scopus.com/inward/record.url?scp=85088223949&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.201902357
DO - 10.3997/2214-4609.201902357
M3 - Conference contribution
VL - 2019
SP - 1
EP - 5
BT - Conference Proceedings
Y2 - 8 September 2019 through 12 September 2019
ER -