Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.5194/soil-8-541-2022
Lizenz creative commons licence
Titel (primär) On the benefits of clustering approaches in digital soil mapping: an application example concerning soil texture regionalization
Autor Dunkl, I.; Ließ, M.
Quelle Soil
Erscheinungsjahr 2022
Department BOSYS
Band/Volume 8
Heft 2
Seite von 541
Seite bis 558
Sprache englisch
Topic T5 Future Landscapes
Daten-/Softwarelinks https://doi.org/10.17605/OSF.IO/GMJTQ
Abstract High-resolution soil maps are urgently needed by land managers and researchers for a variety of applications. Digital soil mapping (DSM) allows us to regionalize soil properties by relating them to environmental covariates with the help of an empirical model. In this study, a legacy soil dataset was used to train a machine learning algorithm in order to predict the particle size distribution within the catchment of the Bode River in Saxony-Anhalt (Germany). The random forest ensemble learning method was used to predict soil texture based on environmental covariates originating from a digital elevation model, land cover data and geologic maps. We studied the usefulness of clustering applications in addressing various aspects of the DSM procedure. To improve areal representativity of the legacy soil data in terms of spatial variability, the environmental covariates were used to cluster the landscape of the study area into spatial units for stratified random sampling. Different sampling strategies were used to create balanced training data and were evaluated on their ability to improve model performance. Clustering applications were also involved in feature selection and stratified cross-validation. Under the best-performing sampling strategy, the resulting models achieved an R2 of 0.29 to 0.50 in topsoils and 0.16–0.32 in deeper soil layers. Overall, clustering applications appear to be a versatile tool to be employed at various steps of the DSM procedure. Beyond their successful application, further application fields in DSM were identified. One of them is to find adequate means to include expert knowledge.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26527
Dunkl, I., Ließ, M. (2022):
On the benefits of clustering approaches in digital soil mapping: an application example concerning soil texture regionalization
Soil 8 (2), 541 - 558 10.5194/soil-8-541-2022