Movilización de carbono orgánico por distintos procesos erosivos en la conexión ladera-cauce

E. Nadeu; C. Boix-Fayos; J. de Vente; J. López; M. Martínez-Mena

doi:10.3989/Pirineos.2010.165008

Authors

E. Nadeu Departamento de Conservación de Suelos y Aguas y Manejo de Residuos Orgánicos, CEBAS-CSIC
C. Boix-Fayos Departamento de Conservación de Suelos y Aguas y Manejo de Residuos Orgánicos, CEBAS-CSIC
J. de Vente Departamento de Desertificación y Geoecología, EEZA-CSIC
J. López Departamento de Conservación de Suelos y Aguas y Manejo de Residuos Orgánicos, CEBAS-CSIC
M. Martínez-Mena Departamento de Conservación de Suelos y Aguas y Manejo de Residuos Orgánicos, CEBAS-CSIC

DOI:

https://doi.org/10.3989/Pirineos.2010.165008

Keywords:

Erosion processes, soil organic carbon, enrichment ratio, catchment, slope-bed connection

Abstract

With the purpose of analysing the type (labile or stable) and quantity of organic carbon (OC) mobilized by different erosive processes identified at the slope-bed connection, the erosion deposits of gullies, sheet erosion, bank erosion and tillage erosion were studied in a small catchment (10 ha) and compared to the characteristics of the catchment soils. Selectivity upon soil detachment and transport was associated to different OC content and types in the erosion deposits. Enrichment ratios of organic carbon sediment/soil were low (~0,40 ± 0,26), even though a slight enrichment was described for fine particles (positively correlated to CO). These results were attributed to mineralization processes prevailing over OC burial in a very active channel where depositional sites are scarce.

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