Preview

Erosion modelling Baden-Württemberg

IPROconsult Logo

Development of a processing strategy for soil erosion modelling for Baden-Württemberg based on the Glems catch-ment area

 

Project background and objective

 

The background to the pilot project was the heavy rainfall risk manage-ment already implemented in Baden-Württemberg, in which municipal heavy rainfall hazard maps are created, which include information on flow paths, flow velocities and over-flow heights of the surface runoff. In order to be able to identify the sur-faces threatened by erosion due to heavy rain, in terms of potential erosion and input of displaced soil material, it is necessary to comple-ment the heavy rainfall risk manage-ment with soil erosion modelling.

 

The aim was to develop a processing strategy for erosion risk modelling for the state of Baden-Württemberg. Due to their methodological advantages, physically-based soil erosion mo-dels were to be used for this purpose (EROSION-3D and open-LISEM).

 

The pilot project was initiated in the German federal state of Baden-Würt-temberg by a broad alliance of spe-cialised authorities within the Ministry of the Environment and Ministry of Agriculture: In the selected pilot area (Glems), a catchment area of about 195 km², located northwest of Stutt-gart, agricultural use dominates on 

Divider
Client:

State Office for Geology, Raw Materials and Mining (LGRB) in the Freiburg Regional Council

Cooperation partner:

geomer GmbH 

Services provided:

Erosion modelling

Execution period:

2021 - 2022 

Published results:

Project report "Erosion modelling for Baden-Württemberg (Glems region)" LGRB technical report 2023/1: https://produkte.lgrb-bw.de/docPool/c717_data.pdf
Digital appendix to the project report Pilot area Glems: https://doi.org/10.5281/zenodo.
7680734

 

the fertile, particularly erosion-prone loess loam soils.

 

Work steps

  • Identification of primary data sources (including digital terrain model, digital landscape model, agricultural crop data, soil map, heavy precipitation data) and development of a processing methodology according to the requirements of the erosion models based on the pilot area Glems
  • Derivation of the required soil and land cover parameters from the land use and soil information for the soil erosion models
ENTWURF

Erosion modelling Baden-Württemberg

IPROconsult Logo
  • Implementation of simulation runs for the Glems pilot area with the two physically-based erosion models EROSION-3D and openLISEM for various land use and precipitation scenarios, evaluation and plausibility check of the results, map creation and design for the erosion hazard maps

 

  • Development of instructions for model application and criteria for model selection regarding the different fields of application of the various stakeholders

 

  • Workshops with the stakeholders, regarding their requirements and expectations of the modelling, as well as the plausibility of the modelling results
  • Development of principles and recommendations for the further procedure for soil erosion modelling (in connection with heavy rainfall risk management): Proposal of a combined approach from a state-wide processing ("Erosion hazard maps Baden-Württemberg" for initial assessment of the significance within the framework of heavy rainfall risk management) coupled with a municipal erosion risk management process (ERM)

 

  • Development of a digital data collection form for field documentation of soil erosion events (for collection in a standardised state-wide database), e.g. for use in the validation of erosion modelling
Figure 1: Project meeting in Stuttgart
Figure 2: Validation workshop with farmers in Ditzingen

Figure 3: Section of the erosion hazard maps (Glems pilot area) for scenario simulations at three different time points

ENTWURF