TremblayPrevost2009

Reference

Tremblay, Y., Rousseau, A.N. Plamondon, A.P., Lévesque, D., Prévost, M. (2009) Changes in stream water quality due to logging of the boreal forest in the Montmorency Forest, Québec. Hydrological Processes, 23(5):764-776.

Abstract

Summer stream water quality was monitored before and following the logging of 50% of the boreal forest within threesmall watersheds (<50 ha) nested in the ‘Ruisseau des Eaux-Vol´ees’ Experimental Watershed, Montmorency Forest (Quebec,Canada). Logging was conducted in winter, on snow cover according to recommended best management practices (BMPs)to minimize soil disturbance and protect advance growth. A 20-m forest buffer was maintained along perennial streams. Inwatershed 7.2, cut-blocks were located near the stream network and logging was partially allowed within the riparian bufferzone. In watersheds 7.5 and 7.7, logging occurred farther away from the stream network. Observations were also made forwatershed 7.3 that collected the runoff from watersheds 7.2 and 7.5, and watershed 7.6, the uproad portion of watershed7.7. The control watershed 0.2 was contiguous to the impacted watersheds and remained undisturbed. Following clearcutting,changes in summer daily maximum and minimum stream temperatures remained within ±1 °C while changes in diurnalvariation did not decrease by more than 0.5 °C. Concentrations of NO3- greatly increased by up to 6000% and concentrationsof KC increased by up to 300% during the second summer after logging. Smaller increases were observed for Fetotal (upto 71%), specific conductance (up to 26%), and Mg2C (up to 19%). Post-logging pH decreased slightly by no more than7% whilePO43- concentration remained relatively constant. Suspended sediment concentrations appeared to increase duringpost-logging, but there was not enough pre-logging data to statistically confirm this result. Logging of moderate intensity andrespecting established BMPs may account for the limited changes of water quality parameters and the low exceedances of thecriteria for the protection of aquatic life. The proximity of the cutover to the stream network and logging within the riparianzone did not appear to affect water quality

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@ARTICLE { TremblayPrevost2009,
    AUTHOR = { Tremblay, Y., Rousseau, A.N. Plamondon, A.P., Lévesque, D. and Prévost, M. },
    TITLE = { Changes in stream water quality due to logging of the boreal forest in the Montmorency Forest, Québec. },
    JOURNAL = { Hydrological Processes },
    YEAR = { 2009 },
    VOLUME = { 23 },
    NUMBER = { 5 },
    PAGES = { 764-776 },
    ABSTRACT = { Summer stream water quality was monitored before and following the logging of 50% of the boreal forest within threesmall watersheds (<50 ha) nested in the ‘Ruisseau des Eaux-Vol´ees’ Experimental Watershed, Montmorency Forest (Quebec,Canada). Logging was conducted in winter, on snow cover according to recommended best management practices (BMPs)to minimize soil disturbance and protect advance growth. A 20-m forest buffer was maintained along perennial streams. Inwatershed 7.2, cut-blocks were located near the stream network and logging was partially allowed within the riparian bufferzone. In watersheds 7.5 and 7.7, logging occurred farther away from the stream network. Observations were also made forwatershed 7.3 that collected the runoff from watersheds 7.2 and 7.5, and watershed 7.6, the uproad portion of watershed7.7. The control watershed 0.2 was contiguous to the impacted watersheds and remained undisturbed. Following clearcutting,changes in summer daily maximum and minimum stream temperatures remained within ±1 °C while changes in diurnalvariation did not decrease by more than 0.5 °C. Concentrations of NO3- greatly increased by up to 6000% and concentrationsof KC increased by up to 300% during the second summer after logging. Smaller increases were observed for Fetotal (upto 71%), specific conductance (up to 26%), and Mg2C (up to 19%). Post-logging pH decreased slightly by no more than7% whilePO43- concentration remained relatively constant. Suspended sediment concentrations appeared to increase duringpost-logging, but there was not enough pre-logging data to statistically confirm this result. Logging of moderate intensity andrespecting established BMPs may account for the limited changes of water quality parameters and the low exceedances of thecriteria for the protection of aquatic life. The proximity of the cutover to the stream network and logging within the riparianzone did not appear to affect water quality },
}

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