caa a22 4500 469029196 CHVBK 20180323132738.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00406960 doi (NATIONALLICENCE)springer-10.1007/BF00406960 Bodo Byron Water Resources Branch, Environment Ontario, 1 St. Clair Ave. W., M4V 1K6, Toronto, Canada aut Statistical analyses of regional surface water quality in southeastern Ontario [Elektronische Daten] [Byron Bodo] Historical records from Ontario's Provincial Water Quality Monitoring Network (PWQMN) for rivers and streams were analyzed to assess the feasibility of mapping regional water quality patterns in southeastern Ontario which spans two major geologic zones, the Precambrian Shield and the St. Lawrence Lowlands, thus serving as a paradigm for much of Ontario. Despite biases toward the populated Lowlands and associated pollution problems, general spatial trends are evident via the analysis of intervariable relations, individual parameter maps and multivariate analysis. Using a robust algorithm designed to identify outliers and abstract underlying bivariate relations, a linear regional hardness-alkalinity relation was derived, where most anomalies proved to be mine drainage impacted sites. Regionally, multivariate ordination reveals that central tendencies of common indicators of ionic strength and nutrient richness correlate positively and that site clusters broadly reflect the transition from oligotrophic Shield waters to eutrophic conditions of heavily agricultural Lowland streams. Results suggest that on the Shield more precisely delineated aquatic regions may be realized by applying GIS to integrate river and synoptic lake survey data. Further synthesis with bedrock and surficial geology, physiography, pedology and other temporally invariant spatial attributes should yield regional patterns of background quality from which locally ‘attainable' water objectives might be defined. Additional synoptic surveys of sedimentary Lowland streams may be required as most available sites relflect anthropogenic pollution. Kluwer Academic Publishers, 1992 Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 165-187 0167-6369 23:1-3<165 1992 23 10661 https://doi.org/10.1007/BF00406960 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00406960 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bodo Byron Water Resources Branch, Environment Ontario, 1 St. Clair Ave. W., M4V 1K6, Toronto, Canada aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 165-187 0167-6369 23:1-3<165 1992 23 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer