00000nam 2200000za 4500 9.866964 CaOODSP 20241203113645 cr ||||||||||| 190111s1986 oncb ot f000 0 eng d CaOODSP eng eng fre n-cn--- En13-5/86-79E-PDF Jeffries, Dean Stuart. Evaluation of the regional acidification of lakes in eastern Canada using ion ratios [electronic resource] / by D.S. Jeffries. Burlington, Ont. : National Water Research Institute, [1986] v, 19 p. : maps NWRI contribution ; no. 86-79 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographic references : p. 17-19. "The ionic composition of lakewaters changes in response to acidic deposition. The alteration is usually manifested as decreased acid neutralizing capacity (ie alkalinity), and increased sulphate (and sometimes calcium + magnesium) concentrations. Given the predictable nature of these changes, it is possible to evaluate the geographic extent of the influence of acidic deposition by calculating appropriate ion ratios for lakes spread across eastern Canada. This report presents the results of such an evaluation in which ratios (alkalinity 3 ion : calcium + magnesium, sulphate = calcium + magnesium, and alkaninity : sulphate) were calculated for a large, high quality data base containing information for over 7000 lakes across all regions of eastern Canada. Contour maps illustrating the variability in the ratio values were prepared"--Executive summary, p. iii. Text in English, abstracts in English and French. gccst Water management gccst Water quality gccst Acid rain Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 86-79. (CaOODSP)9.844121 PDF 1.68 MB https://publications.gc.ca/collections/collection_2019/eccc/En13-5-86-79-eng.pdf