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| Titel |
Modelling the impact of soil erosion on element transfer processes in agro-ecosystems |
| VerfasserIn |
Pu Shi, Raniero Della Peruta, Armin Keller, Rainer Schulin |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094263
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| Publikation (Nr.) |
 EGU/EGU2014-9665.pdf |
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| Zusammenfassung |
| Soil erosion is the main cause for loss of soil fertility worldwide. It can lead to degradation of
soil structure, pollution of water bodies, decrease in crop productivity, and excessive
accumulation of nutrients and trace elements in locations where eroded sediments are
re-deposited. Research into the element transfer in fields and landscapes associated with
erosion has hitherto focused on the assessment of element mobilization and nutrient export
into aquatic ecosystems. Less is known about the role of erosion in element redistribution
within terrestrial environments.
Hence, we are developing a GIS-linked model that describes and visualizes areal patterns
of particle-bound element transfer processes at the field to catchment scale, adapting and
combining existing process-based mechanistic models of soil erosion, soil hydrology,
sediment transport, crop growth, soil nutrient turnover and soil pollutant dynamics. The
model will be tested in a case study of selected catchment in the framework of the
Swiss National Research Program “Sustainable Use of Soil as a Resource” (NRP
68).
The goal is to create a tool that can be used to aid monitoring nutrient and pollutant fluxes
associated with erosion in agricultural landscapes, in particular to identify hot spots of
excessive pollutant accumulation related to the deposition of eroded sediments on agricultural
land for different scenarios of land use and climate change, and to support the evaluation of
land management strategies aiming to control them. |
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