Evaluation of Legacy Forest Harvesting Impacts on Dominant Stream Water Sources and Implications for Water Quality Using End Member Mixing Analysis

A - Papers appearing in refereed journals

Fines, R. W., Stone, M., Webster, K. L., Leach, J. A., Buttle, J. M., Emelko, M. B and Collins, A. L. 2023. Evaluation of Legacy Forest Harvesting Impacts on Dominant Stream Water Sources and Implications for Water Quality Using End Member Mixing Analysis. Water. 15 (15), p. 2825. https://doi.org/10.3390/w15152825

AuthorsFines, R. W., Stone, M., Webster, K. L., Leach, J. A., Buttle, J. M., Emelko, M. B and Collins, A. L.
Abstract

Forests are critical water supply regions that are increasingly threatened by natural and anthropogenic disturbance. Evaluation of runoff-generating processes within harvested and undisturbed headwater catchments provides insight into disturbance impacts on water quality and drinking water treatability. In this study, an extensive hydrologic dataset collected at the experimental Turkey Lakes Watershed (TLW) located on the Canadian Shield was used to quantify sources of stormflow in legacy clear-cut (24-years post harvesting) and forested (control) headwater catchments using an end member mixing analysis (EMMA) model. Stream water, groundwater, soil water, and throughfall water quality were evaluated during spring snowmelt, stormflow, and fall wet-up. Groundwater chemistry was similar to stream water chemistry in both catchments, suggesting that groundwater is a major contributor to stream flow. The water chemistry in small wetlands within the study catchments was comparable to stream water chemistry, suggesting that wetlands are also important contributors to stream flow. Differences in wetland position between the legacy clear-cut and control catchments appeared to have a greater influence on source contributions than legacy harvesting. Results from this study provide insight into runoff-generation processes that reflect event/seasonal flow dynamics and the impacts on water quality.

KeywordsTurkey Lakes Watershed; Forested headwater catchments; Hillslope channel connectivity; Runoff-generation processes; Principal component analysis; Wetlands; Solutes
Year of Publication2023
JournalWater
Journal citation15 (15), p. 2825
Digital Object Identifier (DOI)https://doi.org/10.3390/w15152825
Web address (URL)https://www.mdpi.com/2073-4441/15/15/2825
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition - Work package 3 (WP3) - Sustainable intensification - optimisation at multiple scales
Canadian Forest Service’s Sustainable Forest Management program
forWater NSERC Network for Forested Drinking Water Source Protection Technologies
Accepted author manuscript
Output statusPublished
Publication dates
Online04 Aug 2023
Publication process dates
Accepted30 Jul 2023
PublisherMDPI
ISSN2073-4441
Other fileEvaluation%20of%20Legacy%20Forest%20Harvesting%20Impacts%20on%20Dominant%20Stream%20Water%20Sources%20and%20Implications%20for%20Water%20Quality%20Using%20End%20Member%20Mixing%20Analysis.pdf

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