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Relevance of pedotopographical indicators in the assessment of spatial distributions of soil depth and soil water resources under forest stands : General Methodology
Ridremont, François; Deraedt, Deborah; Robert, Tanguy et al.
2013Final conference AMICE
 

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Keywords :
water resources; soil depth; topography; forest; indicator; Time Domain Reflectometry; Digital Elevation Model; LiDAR; ressources en eau; profondeur du sol; topographie; forêt; indicateur; Reflectométrie temporelle; Modèle Numérique de Terrain
Abstract :
[en] Water resources constitute one of the most decisive factors of the adaptation of forest ecosystems facing climate changes. The assessment of soil water resources should lead a better understanding of forest sites vulnerability to water stress and provide appropriate management recommendations for the choice of trees species and sylvicutlural techniques. This study aims to assess the relevance of pedotopographical indicators in the assessment of spatial distributions of soil depth and soil water resources under forest stands. The study area is located in the shale-slate stones pedological context of the Belgian Ardenne ecoregion. It falls within the constrasted relief of the Houille watershed and is 90% covered by forests. The estimation of spatial and profile distributions of water resources will be based on a multi-year monitoring of real time soil moisture content using TDR technology : subsurface (15 cm) on systematic sampling and profile (. 70 cm) on 32 local sites equipped with TDR pvc tubes. Additional laboratory analysis will be conducted to determine soil properties influencing soil water content (texture, organic matter content...). Directly impacting soil water content, soil depth and stoniness will be investigated in contrasting topographic conditions by (i) two traditional and destructive methods : 32 soil pits & 160 holes with auger soil; and (ii) an electromagnetic and non intrusive method : 5120m of Ground Penetrating Radar traces with 200 and 500 MHz antennas. The identification of soil and terrain attributes, able to explain distribution of soil water content and soil depth, will be done by digital cartographic resources exploitation : (i) Digital Elevation Model with different spatial resolutions (Lidar, 1 m2; Erruissol DEM, 100 m2; Aster DEM, 9.103m2) and (ii) Digital Soil Map of Wallonia. It is expected that the results could lead to the development of operational tools to ensure the forest site . tree species adequacy in order to increase resilience of forest ecosystems to ecological drifts.
Disciplines :
Environmental sciences & ecology
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Ridremont, François ;  Université de Liège - ULiège > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels
Deraedt, Deborah ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Robert, Tanguy ;  Université de Liège - ULiège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Degré, Aurore  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Systèmes Sol-Eau
Claessens, Hugues ;  Université de Liège - ULiège > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels
Language :
English
Title :
Relevance of pedotopographical indicators in the assessment of spatial distributions of soil depth and soil water resources under forest stands : General Methodology
Alternative titles :
[fr] Pertinence d'indicateurs pedo-topographiques dans l'évaluation de la distribution spatiale de la profondeur du sol et des ressources en eau sous peuplements forestiers : méthodologie générale
Publication date :
March 2013
Number of pages :
A0
Event name :
Final conference AMICE
Event organizer :
INTERREG IVB ENO
Event place :
Sedan, France
Event date :
March 13th-15th 2013
By request :
Yes
Audience :
International
Name of the research project :
INTERREG IVB ENO - AMICE
Available on ORBi :
since 04 April 2014

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