00000nam 2200000za 4500 9.862911 CaOODSP 20241203113644 cr ||||||||||| 181009s1972 oncb ob f000 0 eng d CaOODSP eng eng fre n-cn-sn En36-515/59E-PDF Van Everdingen, R. O. Observed changes in groundwater regime caused the creation of Lake Diefenbaker, Saskatchewan [electronic resource] / R.O. Van Everdingen. Ottawa : Inland Waters Branch, Dept. of the Environment, 1972. vi, 65, [3] p. : chart, ill., maps. Technical bulletin ; no. 59 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 23). "Measurements between 1964 and 1971 of piezometric levels in 35 piezometers installed in 9 groups in a multiple aquifer system and in unconsolidated sediments in a section across the valley of the South Saskatchewan River near Riverhurst, Saskatchewan, have revealed increased piezometric pressures as a result of the creation of Lake Diefenbaker. The increases in pressure, which vary with the water level in the reservoir, reflect a hydraulic connection between the aquifers and the reservoir, and not a classical loading effect. The stability of the area immediately downstream from the dam may have been adversely affected by these pressure increases. Groundwater discharge rates have been reduced significantly, and some loss of water from the reservoir appears to take place"--Abstract, p. vi. Includes abstract in French. Groundwater flow Saskatchewan--Diefenbaker, Lake Canada. Environment Canada. Canada. Inland Waters Branch. Technical bulletin (Canada. Inland Waters Branch) no. 59. (CaOODSP)9.861115 PDF 4.97 MB https://publications.gc.ca/collections/collection_2018/eccc/En36-515-59-eng.pdf