EGU21-7371, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-7371
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Testing different remote sensing compositing periods for SOC content extraction in areas across Germany

Simone Zepp1, Martin Bachmann1, Markus Möller2, Bas van Wesemael3, Michael Steininger4, Martin Wiesmeier5, and Uta Heiden1
Simone Zepp et al.
  • 1German Aerospace Center, Remote Sensing Data Center, Wessling, Germany (simone.zepp@dlr.de)
  • 2Julius Kühn-Institut (JKI) Federal Research Centre for Cultivated Plants, Institute for Crop and Soil Science, Braunschweig, Germany
  • 3Université catholique de Louvain, Earth and Life Institute, Belgium
  • 4Mitteldeutsches Institut für angewandte Standortkunde und Bodenschutz, Halle, Germany
  • 5Bavarian State Research Center for Agriculture, Institute for Organic Farming, Soil and Resource Management, Freising, Germany

High spatial and temporal soil information is crucial to analyze soil developments and for monitoring long term changes to avoid soil degradation. A sufficient soil organic carbon (SOC) content is one of the key soil properties to achieve sustainable high productivity of soils, soil health and increased agroecosystem resiliency. For the usage of remote sensing approaches, naturally exposed soils in Germany occur rarely. Mainly agricultural regions can provide areas of exposed soils for short periods of time during a year. The Soil Composite Mapping Processor (SCMaP) is a fully automated approach to make use of per-pixel based bare-soil compositing to overcome the issue of limited soil exposure based on multispectral Landsat (TM 4, ETM 5, ETM+ 7 and OLI 8) imagery for individually determined time periods between 1984 and 2019.

Due to the high spatial and temporal resolution the SCMaP soil reflectance composites contain a considerable potential to derive detailed soil parameters as the SOC contents of exposed soils to add information to existing soil maps on field scale for areawide applications. Besides the soil reflectance composites several field soil samples provided by different federal authorities build the data base for the SOC modeling. Machine learning (ML) algorithms incl. Partial Least Squares and Random Forest regression with various inputs and set-ups are used and applied for several test areas in Germany. Furthermore, the capabilities of different compositing lengths (5-, 10- and 30-years) to derive spatial SOC contents are tested. The results and the validation of the different ML approaches and compositing lengths will be shown, providing insight into the benefits of this approach.

How to cite: Zepp, S., Bachmann, M., Möller, M., van Wesemael, B., Steininger, M., Wiesmeier, M., and Heiden, U.: Testing different remote sensing compositing periods for SOC content extraction in areas across Germany, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-7371, https://doi.org/10.5194/egusphere-egu21-7371, 2021.

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