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Photogrammetric high resolution methods for nested parametrisation and validation of a physical-based soil erosion model

Subject Area Physical Geography
Term from 2019 to 2024
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 405774238
 
Final Report Year 2024

Final Report Abstract

The project aimed to improve the cross-scale modelling of soil erosion, with a particular focus on complex, variable and discontinuous processes (e.g. rill formation). An innovative method combination of photogrammetric measurement and optimisation techniques and physically based erosion models was developed to reduce the limitations of existing process-oriented models. UAV-based 3D reconstruction methods and AI-supported analysis approaches were used for high-resolution observation of soil surface changes at various nested scales (plot, slope and catchment scales). The data obtained was used to calibrate and validate erosion models such as RillGrow, FullSWOF and LISEM, and enabled a differentiated recording of erosion processes. Particularly noteworthy is the development of an automated procedure for rill detection and the introduction of new correction methods to improve photogrammetric soil measurements. Initial results show that high-resolution data significantly increases modelling accuracy and provides new, detailed insights into erosion dynamics. The project presents promising approaches for more accurate and cross-scale modelling of soil erosion, which are important for both research and practical applications.

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