caa a22 4500 469029293 CHVBK 20180323132739.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00406962 doi (NATIONALLICENCE)springer-10.1007/BF00406962 Trend evaluation of water quality parameters in the Niagara and St. Lawrence Rivers [Elektronische Daten] [I. Tsanis, A. El-Shaarawi] Physical and chemical (nutrients and major ions) indicators of water quality monitored by Environment Canada between 1977 and 1987 in the Niagara River at Niagara-on-the-Lake and in the St. Lawrence River at Wolfe Island are analyzed for seasonal and annual variations. Parametric methods such as moving averages and linear regression and nonparametric methods (Spearman's rank coefficient) are used to test for the existence of trends in these data. The results indicate that specific conductivity, sodium and chloride have decreased significantly over the period of study. During the same period there is no significant trend for either discharge and nutrients. Kluwer Academic Publishers, 1992 Tsanis I. Department of Civil Engineering, McMaster University, Hamilton, Ontario, Canada aut El-Shaarawi A. Rivers Research Branch, Basin Integration & Modelling, National Water Research Institute, Burlington, Ontario, Canada aut Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 205-218 0167-6369 23:1-3<205 1992 23 10661 https://doi.org/10.1007/BF00406962 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00406962 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tsanis I. Department of Civil Engineering, McMaster University, Hamilton, Ontario, Canada aut NATIONALLICENCE 700 1- El-Shaarawi A. Rivers Research Branch, Basin Integration & Modelling, National Water Research Institute, Burlington, Ontario, Canada aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 205-218 0167-6369 23:1-3<205 1992 23 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer