Testing the influence of topography and material properties on catchment-scale soil moisture patterns using remotely sensed vegetation patterns in a humid temperate catchment, northern Britain


Autoria(s): Milledge D.G.; Warburton J.; Lane S.N.; Stevens C.J.
Data(s)

2013

Resumo

In order to evaluate the relationship between the apparent complexity of hillslope soil moisture and the emergent patterns of catchment hydrological behaviour and water quality, we need fine-resolution catchment-wide data on soil moisture characteristics. This study proposes a methodology whereby vegetation patterns obtained from high-resolution orthorectified aerial photographs are used as an indicator of soil moisture characteristics. This enables us to examine a set of hypotheses regarding what drives the spatial patterns of soil moisture at the catchment scale (material properties or topography). We find that the pattern of Juncus effusus vegetation is controlled largely by topography and mediated by the catchment's material properties. Characterizing topography using the topographic index adds value to the soil moisture predictions relative to slope or upslope contributing area (UCA). However, these predictions depart from the observed soil moisture patterns at very steep slopes or low UCAs. Copyright (c) 2012 John Wiley & Sons, Ltd.

Identificador

http://serval.unil.ch/?id=serval:BIB_B96CF99A726B

doi:10.1002/hyp.9292

http://onlinelibrary.wiley.com/

Idioma(s)

en

Fonte

Hydrological Processes, vol. 27, pp. 1223-1237

Tipo

info:eu-repo/semantics/article

article