Radar facies of unconsolidated sediments in The Netherlands: A radar stratigraphy interpretation method for hydrogeology
van Overmeeren, R.A.
Nederlands Instituut voor Toegepaste Geowetenschappen TNO
Since 1990, The Netherlands Institute of Applied Geoscience TNO has been carrying out ground penetrating radar (GPR) measurements to assess the potential for imaging and characterising different hydrogeological targets in more than 30 pilot areas in The Netherlands. The experience gained by processing this large amount of radar data has enabled reflection patterns characteristic of different depositional sedimentary environments to be identified. This paper presents typical examples of radar patterns for almost all the sedimentary environments in The Netherlands which are suitable for GPR measurements, including glacial (push moraines, glacio-fluvial deposits, glacio-lacustrine deposits), aeolian (coastal sand dunes, river dunes, cover sands), fluvial (braided river systems, meandering river systems), lacustrine (fen pools) and marine (beach ridges, estuarine deposits, littoral facies). Listing the different radar facies elements characteristic of each environment forms an aid for identifying the types of sedimentary sequences. This radar stratigraphy procedure will be helpful when defining the hydrogeological setting of the subsurface. Aquifer imaging is completed by characterising the reflections from the water table in the various environments as well as the reflection patterns from the host rock, because the intensity of a water-table reflection largely depends on grain size. The most characteristic parts of the GPR sections representative of the different sedimentary environments of The Netherlands have been grouped into a synoptic 'radar facies atlas', together with the inferred reflection patterns.
To reference this document use:
Depositional sedimentary environments
Ground penetrating radar
Radar facies atlas
Ground penetrating radar (GPR)
Elsevier Sci B.V., Amsterdam, Netherlands
Journal of Applied Geophysics, 40 (1-3), 1-18