BelleauPlamondonLagaceEtAl1992

Référence

Belleau, P., Plamondon, A.P., Lagace, R., Pepin, S. (1992) Hydrodynamics of a drained black spruce stand. Canadian Journal of Forest Research, 22(8):1063-1070.

Résumé

The depth of the water table was measured before and after the digging of drainage ditches with 20-, 40-, and 60-m spacings in a black spruce wild holly bog. The peat is mesic with the exception of the top 10 cm which is fibric. The hydraulic conductivity of the 20- to 40-cm layer is low in relation with other Quebec sites under study. The extremely low conductivity under the 40-cm depth and the impermeable mineral soil layer at the bottom of the ditches creates the horizontal profile between ditches. The mean water table depths during the 3 years of the study were 42, 29, and 22 cm, respectively, for the 20-, 40-, and 60-m spacings. The corresponding lowering of the water table was in the order of 25, 13, and 6 cm. The water table was maintained 100, 70, and 40% of the time below the 20 cm deep root zone for the 20-, 40-, and 60-m spacings respectively, compared with 23% for the undrained situation (by simulation). The water table is significantly lowered below the 40-cm threshold for the 20-m spacing only.

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@ARTICLE { BelleauPlamondonLagaceEtAl1992,
    AUTHOR = { Belleau, P. and Plamondon, A.P. and Lagace, R. and Pepin, S. },
    TITLE = { Hydrodynamics of a drained black spruce stand },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 1992 },
    VOLUME = { 22 },
    PAGES = { 1063-1070 },
    NUMBER = { 8 },
    ABSTRACT = { The depth of the water table was measured before and after the digging of drainage ditches with 20-, 40-, and 60-m spacings in a black spruce wild holly bog. The peat is mesic with the exception of the top 10 cm which is fibric. The hydraulic conductivity of the 20- to 40-cm layer is low in relation with other Quebec sites under study. The extremely low conductivity under the 40-cm depth and the impermeable mineral soil layer at the bottom of the ditches creates the horizontal profile between ditches. The mean water table depths during the 3 years of the study were 42, 29, and 22 cm, respectively, for the 20-, 40-, and 60-m spacings. The corresponding lowering of the water table was in the order of 25, 13, and 6 cm. The water table was maintained 100, 70, and 40% of the time below the 20 cm deep root zone for the 20-, 40-, and 60-m spacings respectively, compared with 23% for the undrained situation (by simulation). The water table is significantly lowered below the 40-cm threshold for the 20-m spacing only. },
    KEYWORDS = { WATER-TABLE; PEATLAND; TRANSMISSION },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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