caa a22 4500 469029137 CHVBK 20180323132738.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00406963 doi (NATIONALLICENCE)springer-10.1007/BF00406963 Detection of water quality changes along a river system [Elektronische Daten] [S. Esterby, A. El-Shaarawi, H. Block] Water quality monitoring networks are generally multi-purpose, and thus the data generated are expected to provide information on a set of objectives. Two questions that are fundamental to these objectives are the detection of long term trends and of differences between locations. The extent to which these questions can be answered and the types of statistical methods which can be used are considered in a case study of conventional parameters sampled monthly for nine years. Regression and nonparametric methods, which explicitly account for seasonality, are compared for both the determination of change over time and of differences between locations. Changes over time in the form of step changes and differences between locations which depend upon season were found. Kluwer Academic Publishers, 1992 Esterby S. Lakes Research Branch, National Water Research Institute, L7R 4A6, Burlington, Ontario, Canada aut El-Shaarawi A. Rivers Research Branch, National Water Research Institute, L7R 4A6, Burlington, Ontario, Canada aut Block H. Water Quality Branch, Western and Northern Region, T2P 2M7, Calgary, Alberta, Canada aut Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 219-242 0167-6369 23:1-3<219 1992 23 10661 https://doi.org/10.1007/BF00406963 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00406963 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Esterby S. Lakes Research Branch, National Water Research Institute, L7R 4A6, Burlington, Ontario, Canada aut NATIONALLICENCE 700 1- El-Shaarawi A. Rivers Research Branch, National Water Research Institute, L7R 4A6, Burlington, Ontario, Canada aut NATIONALLICENCE 700 1- Block H. Water Quality Branch, Western and Northern Region, T2P 2M7, Calgary, Alberta, Canada aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 23/1-3(1992-12-01), 219-242 0167-6369 23:1-3<219 1992 23 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer