caa a22 4500 469029315 CHVBK 20180323132739.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00406955 doi (NATIONALLICENCE)springer-10.1007/BF00406955 The predicted effect of SO2 emission controls on the water quality of eastern Canadian lakes [Elektronische Daten] [D. Jeffries, D. Lam, I. Wong, R. Bloxam] Changes in SO inf4 sup2- deposition predicted to occur in response to implementation of announced SO2 emission control programs in Canada and the U.S.A. have been used as input to water chemistry models thereby giving an estimate of the changes in lake acid neutralizing capacity (ANC) and pH that can be expected from these programs. Eastern Canada has been divided into 22 subregions for the purpose of this analysis. Relative to the current level (1982-86) of SO inf4 sup2- deposition (Scenario 1), the effect of the Canadian SO2 emission control program alone (Scenario 2) is compared to that obtained when controls are implemented throughout North America (Scenarios 3 and 4). SO2 emission reduction will effect a shrinkage of the high wet SO inf4 sup2- deposition field in NE North America such that under Scenario 4 conditions, almost no area will remain in Canada that receives >20 kg ha-1 yr-1. The greatest decrease in deposition and resulting change in lake chemistry occurs in southern Ontario and southwestern Quebec. ANC distributions shift to higher concentrations and the percentage of lakes having pH<6 decreases in these areas. The Atlantic Provinces will obtain only a minor benefit from the control programs, i.e. experiencing only a small decrease in deposition and improvement in water quality. High sensitivity of the terrain in many parts of Atlantic Canada means that large numbers of lakes will remain acidic (i.e. ANC<0) and/or have pH<6 (an important biological threshold) even after full implementation of the current plans for SO2 control in Canada and the U.S. Kluwer Academic Publishers, 1992 Jeffries D. Rivers Research Branch, National Water Research Institute, P.O. Box 5050, L7R 4A6, Burlington, Ontario, Canada aut Lam D. Rivers Research Branch, National Water Research Institute, P.O. Box 5050, L7R 4A6, Burlington, Ontario, Canada aut Wong I. Rivers Research Branch, National Water Research Institute, P.O. Box 5050, L7R 4A6, Burlington, Ontario, Canada aut Bloxam R. Air Resources Branch, Ontario Ministry of Environment, 125 Resources Road, East Wing, M9W 5L1, Rexdale, Ontario, Canada aut Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 99-113 0167-6369 23:1-3<99 1992 23 10661 https://doi.org/10.1007/BF00406955 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00406955 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jeffries D. Rivers Research Branch, National Water Research Institute, P.O. Box 5050, L7R 4A6, Burlington, Ontario, Canada aut NATIONALLICENCE 700 1- Lam D. Rivers Research Branch, National Water Research Institute, P.O. Box 5050, L7R 4A6, Burlington, Ontario, Canada aut NATIONALLICENCE 700 1- Wong I. Rivers Research Branch, National Water Research Institute, P.O. Box 5050, L7R 4A6, Burlington, Ontario, Canada aut NATIONALLICENCE 700 1- Bloxam R. Air Resources Branch, Ontario Ministry of Environment, 125 Resources Road, East Wing, M9W 5L1, Rexdale, Ontario, Canada aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 99-113 0167-6369 23:1-3<99 1992 23 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer