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Título

Hydrological connectivity does change over 70 years of abandonment and afforestation in the spanish Pyrenees

Autor López-Vicente, Manuel ; Nadal-Romero, Estela ; Cammeraat, Erik L. H.
Palabras clave Runoff connectivity
Stream flow
Stream flow
Land abandonment
Afforestation
IC model
Fecha de publicación 2017
EditorJohn Wiley & Sons
Citación López-Vicente M, Nadal-Romero E, Cammeraat ELH. Hydrological connectivity does change over 70 years of abandonment and afforestation in the spanish Pyrenees. Land Degradation and Development 28 (4): 1298–1310 (2017)
ResumenRunoff connectivity depends on topography, rainfall, man-made elements (terraces, trails, roads and drainage systems) and vegetation. In this study, we quantified the effects of 70 years of human activities on runoff connectivity in the mountainous Araguás afforested sub-catchment (17·2 ha; Central Spanish Pyrenees). The IC index of hydrological connectivity was chosen to perform this metric over six land use scenarios at high spatial resolution (1 × 1 m of cell size). The current scenario (year 2012) was simulated with three flow accumulation algorithms (MD, MD8 and D8). MD8 was linked with the most frequent hydrological response of the sub-catchment (rainfall intensity and stream flow during 7 years) and generated the most representative pattern of connectivity, especially in the linear landscape elements (LLE). This algorithm was chosen to simulate five past scenarios (1945, 1956, 1973, 1980 and 2006). In all scenarios, the highest connectivity appeared related to trails and roads, as well as to streams and gullies, whereas the lowest appeared related to stonewalls in 1945 and 1956 to hillslopes in 1973, and the following afforestation. Changes in connectivity mainly depended on the changes in the vegetation factor and in a minor way in the total length, spatial location and type of LLE. Afforestation promoted lower and more stable connectivity at both local and catchment scales.
Descripción 24 Pags.- 7 Figs.- 3 Tabls. The definitive version is available at: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-145X
Versión del editorhttp://dx.doi.org/10.1002/ldr.2531
URI http://hdl.handle.net/10261/137075
DOI10.1002/ldr.2531
ISSN1085-3278
E-ISSN1099-145X
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