Assessing The Use Of Poplar Tree Systems As A Landfill Evapotranspiration Barrier With The SHAW Model  

Oleh:

Preston, G. M. ; McBride, R. A.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 22 no. 4 (Aug. 2004), page 291-305.
Topik: Municipal solid waste landfill; remediation; poplar tree system; evapotranspiration barrier; SHAW model; deep drainage; leachate; wmr 706–3
Fulltext: 291.pdf (319.58KB)

Isi artikel

The use of poplar tree systems (PTS) as evapotranspiration barriers on decommissioned landfills is gaining attention as an option for leachate management. This study involved fieldtesting the Simultaneous Heat and Water (SHAW) model for its ability to reliably estimate poplar transpiration, volumetric soil water content, and soil temperature at a landfill located in southern Ontario, Canada. The model was then used to estimate deep drainage and to ascertain the influence of a young PTS on the soil water balance of the landfill cover. The SHAW model tended to underestimate poplar transpiration [mean difference (MD) ranged from 0.33 to 3.55 mm on a daily total basis] and overestimate volumetric soil water content by up to 0.10 m3 m–3. The model estimated soil temperature very well, particularly in the upper 1 m of the landfill cover (MD ranged from –0.1 to 1.6 ×°C in this layer). The SHAW model simulations showed that deep drainage decreased appreciably with the presence of a young PTS largely through increased interception of rainfall, and that PTS have a good potential to act as effective evapotranspiration barriers in northern temperate climate zones.

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