 |
| Titel |
Case studies: Soil mapping using multiple methods |
| VerfasserIn |
Hauke Petersen, Tina Wunderlich, Said A. Al Hagrey, Wolfgang Rabbel, Harald Stümpel |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250039060
|
|
|
|
|
|
| Zusammenfassung |
| Soil is a non-renewable resource with fundamental functions like filtering (e.g. water), storing
(e.g. carbon), transforming (e.g. nutrients) and buffering (e.g. contamination). Degradation of
soils is meanwhile not only to scientists a well known fact, also decision makers in politics
have accepted this as a serious problem for several environmental aspects. National
and international authorities have already worked out preservation and restoration
strategies for soil degradation, though it is still work of active research how to put these
strategies into real practice. But common to all strategies the description of soil state
and dynamics is required as a base step. This includes collecting information from
soils with methods ranging from direct soil sampling to remote applications. In an
intermediate scale mobile geophysical methods are applied with the advantage of fast
working progress but disadvantage of site specific calibration and interpretation
issues.
In the framework of the iSOIL project we present here some case studies for soil mapping
performed using multiple geophysical methods. We will present examples of combined field
measurements with EMI-, GPR-, magnetic and gammaspectrometric techniques carried out
with the mobile multi-sensor-system of Kiel University (GER). Depending on soil type
and actual environmental conditions, different methods show a different quality of
information. With application of diverse methods we want to figure out, which methods or
combination of methods will give the most reliable information concerning soil
state and properties. To investigate the influence of varying material we performed
mapping campaigns on field sites with sandy, loamy and loessy soils. Classification of
measured or derived attributes show not only the lateral variability but also gives hints
to a variation in the vertical distribution of soil material. For all soils of course
soil water content can be a critical factor concerning a succesful application of
geophysical methods, e.g. GPR on wet loessy soils will result in a high attenuation of
signals.
Furthermore, with this knowledge we support the development of geophysical
pedo-transfer-functions, i.e. the link between geophysical to soil parameters, which is active
researched in another work package of the iSOIL project.
Acknowledgement:
iSOIL-Interactions between soil related sciences – Linking geophysics, soil science and
digital soil mapping is a Collaborative Project (Grant Agreement number 211386) co-funded
by the Research DG of the European Commission within the RTD activities of the FP7
Thematic Priority Environment. |
|
|
|
|
|
|