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Peatland Hydrological Dynamics in Northern Minnesota

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Peatland Hydrological Dynamics in Northern Minnesota

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2015-09

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Abstract

I investigated peatland water table elevation responses to large precipitation events and long precipitation-free periods for a fen, poor fen, and bog, and pore water chemistry trends in a fen boundary zone, in northern Minnesota. Water table change compared to both precipitation and dry periods was slower in the fen than the poor fen or bog, a response attributed to connections between the fen and the regional groundwater aquifer. Water table change compared to larger dry periods remained consistent over a 51-year period and among peatlands. Calcium-silicon ratios in fen pore water were collected along transects perpendicular to the fen boundary. Larger calcium-silicon ratios at edge of the fen were interpreted as originating from a regional aquifer source, with minimal influence from vegetative calcium uptake and upland subsurface runoff. The extent of the fen-upland boundary zone was demarcated where calcium-silicon ratios matched average fen and stream outlet calcium-silicon ratios.

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University of Minnesota M.S. thesis. September 2015. Major: Natural Resources Science and Management. Advisors: Randall Kolka, Diana Karwan. 1 computer file (PDF); vii, 89 pages.

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Roush, Benjamin. (2015). Peatland Hydrological Dynamics in Northern Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/175492.

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