This paper presents an experimental setup to study the SPAC (Soil-Plant-Atmosphere Continuum) and the mechanisms of water extraction by vegetation. The infiltration column was equipped with TDR probes and High-Capacity Tensiometers to monitor the profiles of volumetric water content and suction respectively. A balance was used to monitor the evaporation/evapotranspiration rate. Experiments were run in parallel on a bare sample and a soil sample vegetated with grass respectively. Two different evaporation/evapotranspiration regimes were imposed by considering natural and forced ventilation. The experimental setup was able to cap-ture the transition from the energy-limited to the water–limited regime. The profiles of water content and suc-tion recorded by TDR probes and the high-capacity tensiometers where coherent with the different stages in the evapotranspiration process. The response of the TDR probes has also been successfully validated by com-parison with measurements of water content by oven-drying.
|Number of pages||6|
|Publication status||Published - 3 Aug 2018|
|Event||7th International Conference on Unsaturated Soils - HKUST, Hong Kong, China|
Duration: 3 Aug 2018 → 5 Aug 2018
|Conference||7th International Conference on Unsaturated Soils|
|Period||3/08/18 → 5/08/18|
- infiltration column
- unsaturated soil
- soil-plant-atmosphere continuum
- soil atmosphere interaction
- evapo transpiration
Data for: "An Infiltration column to investigate experimentally the response of the Soil-Plant-Atmosphere Continuum"