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Poster De Conférence Année : 2012

Spatio-temporal modeling of soil erosion and soil carbon content at the landscape scale in the context of global change

Résumé

The soil erosion and the decrease in soil organic carbon (SOC) content have been identified in 2006 by the European Commission as two of the major threats on European soils. Soil erosion and SOC are closely related, and their spatial variability and temporal dynamics are strongly affected by natural and anthropogenic processes occurring at the landscape scale. This study aims to model simultaneously the soil depth evolution (erosion and accumulation) and the SOC dynamics at the landscape scale over 100 years. The study area was situated within a complex agricultural hedgerow landscape (NW France), with varying soil parent material, slopes, soil depth, field size and land use. We estimated in a previous study the initial depth of soil and SOC stocks. We used a soil evolution model, coupling a SOC dynamics model based on RothC and a soil erosion and accumulation model called Landsoil model. We modeled the soil evolutions under two climate scenarios: a stationary scenario where climate is similar to that observed in the past 30 years, and a climate change scenario corresponding to the A1B emissions scenario of the Intergovernmental Panel on Climate Change. Moreover, different scenarios of land use and farming practices were applied. We will discuss the combined effects of land use, farming practice and climate on soil evolution (soil depth and SOC), considering both the general evolution of the soil properties at the study site scale and their spatial distribution.
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Dates et versions

hal-01209222 , version 1 (02-10-2015)

Identifiants

  • HAL Id : hal-01209222 , version 1
  • PRODINRA : 274504

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Marine Lacoste, Valérie Viaud, Didier Michot, Christian Walter. Spatio-temporal modeling of soil erosion and soil carbon content at the landscape scale in the context of global change. Eurosoil 2012 - Soil Science For The Benefit of Mankind and Environment, Jul 2012, Bari, Italy. 2012. ⟨hal-01209222⟩
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