Statistical evaluation of Agricultural terraces control on soil erosion
Résumé
Agricultural terraces, built on slopes, are known to limit soil erosion, promote water retention and increase yield. This information is mainly feedback from experimental plots (Deng et al., 2021). Agricultural terraces are now seen as a method of adaptation to climate change, which in some regions will result in prolonged droughts interspersed with intense rainfall events (e.g. Kosmowski, 2016). The question of their resistance to extreme rainfall remains. The research work presented here exploits the comparison of Sentinel2 satellite data acquired before and after the storm Alex that hit the south of France in October 2020. A change detection model (Cerbelaud et al., 2021) is used to assign a probability of damage to agricultural plots. Outside the major river beds, this damage is the consequence of intense runoff with erosion and deposition processes. The territory studied is that of the Alpes Maritimes, located on the Mediterranean coast. It still has many terraces maintained or used for the cultivation of olive trees. The approach consists in evaluating whether the probability of damage is statistically lower in plots with terraces than in plots without terraces. The results indicate a significant effect of terraces on damage limitation in agricultural plots.
https://esdac.jrc.ec.europa.eu/public_path/shared_folder/euso/workshop_soil_erosion/erosion_mitigation-management/43%20-%20Breil%26Cerbelaud.pdf
Domaines
Sciences de l'environnementOrigine | Fichiers produits par l'(les) auteur(s) |
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