Análisis del papel de las terrazas de cultivo abandonadas en la hidrología y dinámica de sedimentos en una pequeña cuenca de montaña

P. Llorens; J. Latron; F. Gallart

doi:10.3989/pirineos.1992.v139.180

Analysis of the role of agricultural abandoned terraces on the hydrology and sediment dynamics in a small mountainous basin (High Llobregat, Eastern Pyrenees)

Authors

P. Llorens Institut de Ciències de la Terra Jaume Almera
J. Latron Centre d'Etudes et de Recherches Eco-Géographiques
F. Gallart Institut de Ciències de la Terra Jaume Almera

DOI:

https://doi.org/10.3989/pirineos.1992.v139.180

Abstract

In the Cal Parisa basin (36 Ha) a sub-basin of 17 Ha was Instrumented In 1989 In order to study the hydrological response and the sediment dynamics of mountainous areas highly modified by traditional agriculture and now abandoned. The results show the preservative role of the agricultural terraces, characterized by a high water retention capacity and a very low sediment yield, in spite of significant amounts of sediment which are transferred within the basin but do not reach the outlet During rainy periods the partial saturation of terraces produces important runoff volumes quickly drained by the man made network of ditches, generating sharp runoff peaks. These ditches are shown therefore to be the elements of major hydrological and linear erosion risks. Nowadays the lack of drainage network maintenance, as a result of land abandonment, has caused disorganization which may have some Important hydro-geomorphological and land conservation consequences.

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Published

1992-06-30

How to Cite

Llorens, P., Latron, J., & Gallart, F. (1992). Analysis of the role of agricultural abandoned terraces on the hydrology and sediment dynamics in a small mountainous basin (High Llobregat, Eastern Pyrenees). Pirineos, 139, 27–46. https://doi.org/10.3989/pirineos.1992.v139.180

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Issue

Vol. 139 (1992)

Section

Articles

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