00000nam 2200000zi 4500 9.870562 CaOODSP 20241203113647 m o d f cr bn||||||||| 190326s1991 onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-ab n-cn-sn x7x8 En13-5/91-02E-PDF Esterby, S. R., author. Testing for trend in water quality monitoring data / S.R. Esterby, A.H. El-Shaarawi, LC. Keeler and H.O. Block. Burlington, Ontario : National Water Research Institute = Institut national de recherche sur les eaux, [1991] 1 online resource (4 unnumbered pages, 24 pages, 6 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 91-02 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Methods for time trend detection and estimation, suitable for water quality data sets such as that from the Bow and South Saskatchewan Rivers, are considered here. Several features of the data set determine the class of methods which can be used. The record length is moderate (about 10 years) and the sampling interval within the year is long enough so that the presence of serial correlation is unlikely (van Belle and Hughes, 1984, suggest that the interval should be at least two weeks). The sampling and analytical techniques are consistent over the period of interest or the effect of changes can be removed in the statistical analysis. Features, such as seasonality and missing data, are present and must be taken into account"--Introduction, page 1. Includes management perspective and abstract in French. gccst Water quality gccst Rivers El-Shaarawi, A. H., author. Keeler, L. C., author. Block, H. O., author. Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. National Water Research Institute (Canada). Rivers Research Branch. Canada. Inland Waters Directorate. Western and Northern Region. Water Quality Branch. National Water Research Institute (Canada) NWRI contribution ; no. 91-02. (CaOODSP)9.844121 PDF 2.21 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-91-02-eng.pdf