- Title
- Hillslope erosion in a grassland environment: calibration and evaluation of the SIBERIA landscape evolution model
- Creator
- Hancock, G. R.; Gibson, Abraham; Wells, T.
- Relation
- Earth Surface Processes and Landforms Vol. 46, Issue 4, p. 728-743
- Publisher Link
- http://dx.doi.org/10.1002/esp.5060
- Publisher
- John Wiley & Sons
- Resource Type
- journal article
- Date
- 2021
- Description
- Field measurement and modelling of soil erosion provides insights into landscapesystems as well as the potential for enhanced landscape management. There are anumber of field and numerical methods by which soil erosion and deposition can bequantified. Here we examine the capability of the SIBERIA landscape evolutionmodel to quantify short-term erosion and deposition on a well-managed cattle grazing landscape on the east coast of Australia. The model is calibrated by twomethods (1) a geomorphological approach using a site digital elevation model(DEM) and soil data and (2) a laboratory-scale flume. The two calibration processesresulted in similar model input parameters and estimated erosion rates of 3.1 t ha−1year−1and 4.4 t ha−1year−1, respectively. These were found to closely match erosion rates estimated using the environmental tracer137Cs (2.7–4.8 t ha−1year−1. However, erosion and deposition estimated at individual points along the hillslopewas not well correlated with137Cs at the same position due to the temporal averag-ing of the model and microtopography. Sensitivity analysis showed the model wasmore sensitive to parameterisation than sub-DEM-scale topography. This placesconfidence in the model’s ability to estimate erosion and deposition across an entirehillslope and catchment on decadal time scales. We also highlight the robustnessand flexibility of the calibration methods.
- Subject
- 137Cs; flume; environmental tracer; landscape evolution model; Siberia; soil erosion
- Identifier
- http://hdl.handle.net/1959.13/1433343
- Identifier
- uon:39223
- Identifier
- ISSN:0197-9337
- Language
- eng
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