Spatial interaction between collapsed pipes and landslides in hilly regions with loess-derived soils

Auteur(s) et Affiliation(s)

VERACHTERT, E.

Dep. of Earth and Environmental Sciences, K.U., Leuven, Belgique

Dep. of Transition Energy and Environment, Flemish Inst. for Technological Research (VITO), Mol, Belgique

VAN DEN EECKHAUT, M.

Climate Risk Management Unit, Inst. for Environment and Sustainability Joint Research Centre (IRC), Ispra, Italie

Dep. of Earth and Environmental Sciences, K.U., Leuven, Belgique

POESEN, J.

Dep. of Earth and Environmental Sciences, K.U., Leuven, Belgique

DECKERS, J.

Dep. of Earth and Environmental Sciences, K.U., Leuven, Belgique

Description :
This study aims at a better understanding of the interaction between collapsed pipe (CP) occurrence and landslide (LS) occurrence in the Flemish Ardennes (Belgium) by comparing their respective spatial patterns. At least 24,5% of the 139 sites with CP were related to the occurrence of an observed LS. Poorly drained LS may create favourable conditions for pipe development. Outside LS, natural and anthropogenic (e.g. broken field drains, road drainage) causes may result in concentrated subsurface flow, resulting in pipe development. No evidence was found that pipe development enhanced LS, probably because the subsurface drainage discharge generated upslope of the LS is too low. Even when pipes become blocked, it is more likely that new pipes develop and new collapses occur than they trigger or reactivate LS. A conceptual model is presented summarizing all elements that influence piping erosion in the Flemish Ardennes, including the role of LS.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 8, p. 826-835, nombre de pages : 10, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais