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Contributed by Frederic Classon   
Monday, 24 April 2006

The shallow subsurface of present day urban areas has been severely modified by anthropogenic landscaping since pre-historic times. These changes of the geoenvironment can be reproduced by man made ground which shows a complex and heterogeneous distribution and structure.




For example, grave artificial landscaping in the Eastern Districts of Cologne can be traced back into roman times. It is recordet by deposits filling a trench, which  surroundet the former roman fort (see Fig. 1).

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For example, grave artificial landscaping in the Eastern Districts of Cologne can be traced back into roman times. It is recordet by deposits filling a trench, which  surroundet the former roman fort (see Fig. 1).

 

 

Fig. 1: 3-D subsurface model of the roman moat in the Eastern district of Cologne

Further anthropogenic elements recorded in subsurface structures, deposits and subsurface features are:

  • terraces and irrigation-canals for farming,
  • cuttings and embankments from railway- and road-engineering,
  • dikes and channels for flood defence,
  • landfills for relief levelling,
  • as well as banks and ditches from e.g. military constructions and fortifications,
  • quarries, pits and dumps from mining-activity (see Fig. 2)


Fig. 2: Structural model of the surface features and subsurface in the area of a former minig area.

Research-focus is to provide a guideline on how to locate and characterize and model man made ground, by using historic-geographical techniques and the latest Surface Information Systems such as Geographical Information Systems (GIS) and subsurface Geoscientific Information Systems (GSIS) such as GSI3D.

Fig. 3: Technogenic landuse sequences constructed from topographic maps

Timelapse Land-use sequences from historic maps and drawings, historical reports, archaeological excavations as well as from aerial photographs are constructed
(Fig. 2).
The structures and distribution of man-made ground deriving from the cartographical work provide potential boundaries and outcrops of artificial ground units. These data sets, in combination with borehole information, are integrated into a subsurface modelling software (GSI3D an the respective subsurface viewer), where sediment units can be addressed and distinguished by means of their 3-dimensional relationship, regarding textural, lithological, morphological as well as genetical features and properties.




These anthropogenic heritages have to be systematically addressed, characterized, quantified and qualified in order to understand the complexity of the urban subsurface in needs for a sustainable city-development for it contributes to an improved decision-support in terms of city-planning an city engineering.


List of publications and posters

  • Classon, F., Brunotte, E., Sobisch, H.-G. & Neber, A. (2005): Zur dreidimensionalen Modellierung von anthropogenen Ablagerungen in urbanen Räumen am Beispiel des rechtsrheinischen Kölns.- Geotechnik 2, 2005. Abstract:

  • Neber, A. Classon, F. Hesemann, J. & Sobisch, H.-G. (2004) An urban subsurface in three dimensions. A Surveying and Modelling Concept for the eastern part of Cologne.- In: JAKOBS, F., RÖHLING, H.-G. & UHLMANN, O. (Ed.): GeoLeipzig 2004 - Geowissenschaften sichern Zukunft. Schriftenreihe der Deutschen Geologischen Gesellschaft 34, 382.

  • Classon, F., Boenigk, W., Brunotte, E, Sobisch, H.-G., Neber, A. (2004): Modelling Concept for artificial Ground.- Tagungsband Deuqua-Tagung 2004 Poster

  • NEBER, A., CLASSON, F., KEMNA, H.-A., KLOSE, S., PERK, M., SCHADE, S., WEBER, B. & SOBISCH, H.-G. (2004). GEOSUM (Integrated working group for Geo-scienitific Surveying and Modelling in 3D): A step towards an integrated approach in three dimentsional subsurface modelling. In: JAKOBS, F., RÖHLING, H.-G. & UHLMANN, O. (Ed.): GeoLeipzig 2004 - Geowissenschaften sichern Zukunft. Schriftenreihe der Deutschen Geologischen Gesellschaft 34, 382.

  • NEBER, A., CLASSON, F., HESEMANN, J. & SOBISCH, H.-G. (2004). An urban subsurface in three dimensions, a surveying and modelling concept for the eastern parts of Cologne. In: JAKOBS, F., RÖHLING, H.-G. & UHLMANN, O. (Ed.): GeoLeipzig 2004 - Geowissenschaften sichern Zukunft. Schriftenreihe der Deutschen Geologischen Gesellschaft 34, 383.

  • Neber, A., Aubel, J., Classon, F., Hoefer, S., Kunz, A. & Sobisch, H.-G. (2006): From the Devonian to the present: Landscape and technogenic relief evolution in an urban environment.- IAEG 2006 (in press)

  • NEBER, A. & CLASSON, F. (2006): Artificial Changes of the Environment in the Eastern Parts of Cologne - A Depositional and Technological Journey from the Devonian to the Present.- Tagungsband SEAGA Conference 2006. Abstract: 

  • NEBER, A., HOWAHR, M. & CLASSON, F. (2006): The Urban Subsurface in Three Dimensions Using GSI3D - Decision Support for a Sustainable Management Based on 3D Geological/Technological Structure Models - A Guideline Towards Best Practice.- - Tagungsband SEAGA Conference 2006. Abstract:

     

     


Downloads:

Modelling Concept
for artificial Ground
(Deuqua Meeting 2004):

An urban subsurface
in three dimensions
(GeoLeipzig Meeting 2004)

 
GEOSUM: A Step towards an integrated concept in three dimensional subsurface modelling (GeoLeipzig Meeting 2004)



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