SEDIMENT CONNECTIVITY ASSESSMENT AND SOIL EROSION MODELLING:HOW TO IDENTIFY HOT-SPOTS AND IMPROVE SOIL PROTECTION MEASURES
| Autoři | |
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| Rok publikování | 2025 |
| Druh | Konferenční abstrakty |
| Citace | |
| Popis | Extreme rainfall events have become more frequent in recent decades. They especially threaten small watersheds with limited drainage capacity. Knowledge about sediment connectivity is crucial for the mitigation of the negative impacts of these events on local communities. Unfortunately, information on connectivity, extent of soil erosion, and causal precipitation events is insufficient or missing. In our research, we used various methods for sediment connectivity assessment (ECA, IC, field mapping) and tested the WEPP (GeoWEPP) model in five small catchments in the Czech Republic, where the precipitation caused soil erosion on arable land. The WEPP model was validated by results obtained from UAV measurement. GeoWEPP soil erosion maps were compared with the results of the connectivity assessment for Hot-spot delineation. The main output is maps for each catchment containing hot spots regarding soil erosion and sediment connectivity. For one catchment, a series of maps were created showing the impact of crop type change on soil erosion and sediment connectivity. This study i) offers a new perspective on the link between sediment connectivity and the topic of soil erosion, ii) Tests the widely used WEPP model and its GIS interface on available data for the Czech Republic, iii) Suggests results that can serve as a basis for land use management, soil erosion, and flood protection improvement. |
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