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17 May 2011
Status : this preprint was under review for the journal HESS but the revision was not accepted.
Technical Note: Development of an automated lysimeter for the calculation of peat soil actual evapotranspiration
S. Proulx-McInnis , A. St-Hilaire , A. N. Rousseau , S. Jutras , G. Carrer , and G. Levrel
A limited number of publications in the literature deal with the measurement of actual evapotranspiration (AET) from a peat soil. AET is an important parameter in the description of water pathways of an ecosystem. In peatlands, where the water table is near the surface and the vegetation is composed of nonvascular plants without stomatal resistance, the AET measurement represents a challenge. This paper discusses the development of an automated lysimeter installed between 12 and 27 July 2010, at a 11-ha bog site, Pont-Rouge (42 km west of Quebec City, Canada). This system was made of an isolated block of peat, maintained at the same water level as the surrounding water table by a system of submersible pressure transmitters and pumps. The change in water level in millimetres in the isolated block of peat was used to calculate the water lost through evapotranspiration (ET) while accounting the precipitation. The rates of AET were calculated for each day of the study period. Temperature fluctuated between 17.2 and 23.3 °C and total rainfall was 43.76 mm. AET rates from 0.6 to 6.9 mm day−1 were recorded, with a ΣAET/ΣP ratio of 1.38. The estimated potential ET (PET) resulting from Thornthwaite's semi-empirical formula suggested values between 2.8 and 3.9 mm day−1 . The average AET/PET ratio was 1.13. According to the literature, the results obtained are plausible. This system, relatively inexpensive and simple to install, may eventually be used to calculate AET on peaty soils in the years to come.
Received: 19 Feb 2011 – Discussion started: 17 May 2011
Publisher's note : Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
S. Proulx-McInnis , A. St-Hilaire , A. N. Rousseau , S. Jutras , G. Carrer , and G. Levrel
Status: closed
Status: closed
AC : Author comment | RC : Referee comment | SC : Short comment | EC : Editor comment
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Status: closed
Status: closed
AC : Author comment | RC : Referee comment | SC : Short comment | EC : Editor comment
- Printer-friendly version
- Supplement
S. Proulx-McInnis , A. St-Hilaire , A. N. Rousseau , S. Jutras , G. Carrer , and G. Levrel
S. Proulx-McInnis , A. St-Hilaire , A. N. Rousseau , S. Jutras , G. Carrer , and G. Levrel
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