Surface and subsurface flow in eucalyptus plantations in north-central Portugal

Title:

Surface and subsurface flow in eucalyptus plantations in north-central Portugal

Creator:

Boulet, Anne-K., Prats, Sergio A., Malvar, Maruxa C., González-Pelayo, Oscar, Coelho, Celeste O.A., Ferreira, Antonio J.D., and Keizer, Jan J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:dcf1e23e-63a9-4f6b-b480-42a5f9bfa7ce
uuid:dcf1e23e-63a9-4f6b-b480-42a5f9bfa7ce
doi:10.1515/johh-2015-0015

Subject:

overland flow, subsurface flow, streamflow, soil moisture, and Eucalypt

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In the Baixo Vouga region of north-central Portugal, forests occupy half of the territory, of which two thirds are Eucalypts plantations. The hydrological implications of this large-scale introduction of eucalypt are unknown and the aim of this exploratory study, realized in the Caramulo Mountains, was to describe overland flow (OLF), subsurface flow (SSF) and stream flow (Q) in a catchment dominated by Eucalyptus plantations. The main conclusions are that annual OLF rate is low, spatially heterogeneous between 0.1% and 6% and concentrated during the wet season as saturation excess, particularly as return flow. Infiltration-excess OLF due to the strong soil water repellence (SWR) is dominant during dry season, but produces residual runoff amount. SSF is the principal mechanism of runoff formation. It originates from matrix flow and pipe flow at the soil-bedrock interface, principally during the wet season. Matrix flow is correlated with soil moisture (SM) content, with a threshold of 25 %. Pipe flow starts with saturation of soil bottom but without saturation of the entire soil profile, due to a large network of macropores. Stream flow response is highly correlated with matrix flow behaviour in timing and intensity. SWR induces a very patchy moistening of the soil, concentrates the fluxes and accelerates them almost 100 times greater than normal percolation of the water in the matrix.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

193-200

Source:

Journal of hydrology and hydromechanics | 2015 Volume:63 | Number:3

Harvested from:

CDK

Metadata only:

false