(2021). The terraces of the Anti-Atlas: from abandonment to the risk of degradation of a landscape heritage. Water, 02/02/2021, vol. 13, n. 4, p. 1-13.
https://doi.org/10.3390/w13040510
https://doi.org/10.3390/w13040510
Titre : | The terraces of the Anti-Atlas: from abandonment to the risk of degradation of a landscape heritage (2021) |
Type de document : | Article |
Dans : | Water (vol. 13, n. 4, February 2021) |
Article en page(s) : | p. 1-13 |
Langues : | Anglais |
Langues du résumé : | Anglais |
Catégories : |
Catégories principales 07 - ENVIRONNEMENT ; 7.5 - Dégradation : Impact, DésertificationThésaurus IAMM DEGRADATION DES TERRES ; EROSION ; PAYSAGE ; PAYSAGE AGRICOLE ; CULTURE EN TERRASSE ; EXODE RURAL ; ANTI ATLAS ; MAROC |
Résumé : | The Anti-Atlas is subject to an intense rural exodus. The agricultural terraces built for several centuries have been abandoned. They are gradually deteriorating. The risks of runoff and erosion are becoming significant. The objective was to study the effect of the abandonment of terraces on the risks of runoff and erosion in the territory of two villages, Tizerkine and Timzemzit. After the characterization of the soil surface conditions, the extent of erosion and the risk of runoff were qualified according to the age of abandonment. Erosion was assessed by estimating the ?soil surface factor? (PAP/CAR method) and infiltration by the double ring method. The abandonment of the terraces has led to a reduction in the plant cover of the soil surface and its opening and to enhancing its compaction. The risk of runoff is high. A year of abandonment reduced the infiltration from 301.8 mm/h (SD: 105.8 mm/h) to 129.6 mm/h (SD: 28.9 mm/h). Furthermore, 5 years of abandonment reduced it to 62.9 mm/h (SD: 14.9 mm/h). The walls of the terraces are gradually being destroyed with an increasing age of abandonment. More than half (57%) of the terraced slope surface has suffered moderate to high water erosion. More than 11% of the surfaces are severely degraded after 20 years of abandonment. The heritage made up of these managed slopes is being lost. Particular attention must be paid to these landscapes in order to better rehabilitate and develop them. |
Cote : | En ligne |
URL / DOI : | https://doi.org/10.3390/w13040510 |