00000nam 2200000za 4500 9.862586 CaOODSP 20241203113644 cr ||||||||||| 181001s1975 oncd #ob f000 0 eng d CaOODSP eng eng fre n-cn-on En36-503/89E-PDF En36-503/89 Maguire, R. J. (R. James) Effects of ice cover on dissolved oxygen in Silver Lake, Ontario [electronic resource] / R.J. Maguire and N. Watkin. Ottawa : Environment Canada, Inland Waters Directorate, Water Resources Branch, 1975. v, 3 p. : graphs Technical bulletin - Inland Waters Directorate ; no. 89 Contract # KL 327-4-8069. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Weekly sampling was performed at the deepest point (23 m) of Silver Lake for a few chemical parameters during the late fall and winter of 1973-74. The amount of dissolved oxygen in most of the water column decreased by about 2 ppm during the winter. At the bottom, the decrease in dissolved oxygen amounted to 4-5 ppm, and the level of hydrogen sulfide increased significantly. This decrease in the amount of dissolved oxygen is probably due to the prevention of atmospheric mixing by the ice and snow cover. In general, the amounts of orthophosphate, nitrate, chloride and total organic carbon remained constant during the winter, as did the values of specific conductance and pH"--Abstract, p. v. Includes abstract in French. gccst Air gccst Ice gccst Lakes Watkin, N. Canada. Environment Canada. Canada. Inland Waters and Lands Directorate. Canada. Water Resources Branch. Technical bulletin (Canada. Inland Waters Directorate) no. 89. (CaOODSP)9.861123 PDF 539 KB https://publications.gc.ca/collections/collection_2018/eccc/en36-503/En36-503-89-eng.pdf