NDLI: Sulphate Flux from an Upland Forested Catchment in South-Central Ontario, Canada

Content Provider	Springer Nature Link
Author	Eimers, M. Catherine Dillon, Peter J. Schiff, Sherry L.
Copyright Year	2004
Abstract	Net SO$_{4}$ export from forested catchments will delay the response of downstream surface waters to decreases in S-deposition. In the Muskoka-Haliburton region of south-central Ontario, net SO$_{4}$ export from wetland-dominated catchments is largely explained by release of stored S from swamps, although similar net export from upland catchments requires an alternate explanation. To investigate possible sources and controls of SO$_{4}$ export in upland systems, SO$_{4}$ input-output budgets were calculated for a small (3.45 ha) upland, forested catchment in Haliburton County over an eight yr period. Temporal patterns of SO$_{4}$ concentrations in soil leachate were significantly correlated with patterns in stream water, but expected relationships with deposition were weak. Instead, SO$_{4}$ concentrations in surface soil leachate (LFH) appeared to be related to changes in soil moisture, and SO$_{4}$ concentrations in LFH leachate increased dramatically in the summer, when warm dry periods were broken by rainstorms. Higher SO$_{4}$ concentrations in organic surface soils were translated vertically down the soil profile; however, SO$_{4}$ concentrations at the base of the soil profile (B-horizon) were much less variable than in the LFH, and appear to be modified by processes occurring in the mineral soil, likely adsorption/desorption reactions. Deposition is the major source of SO$_{4}$ to catchments in this region, but SO$_{4}$ export in stream water exceeded input via bulk deposition by at least 40% in every year of record. Net SO$_{4}$ export from upland catchments appears to be a result of SO$_{4}$ release through mineralization of organic compounds and desorption from subsurface mineral soil.
Starting Page	3
Ending Page	21
Page Count	19
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	152
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogeology Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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