Download Atlas of Alberta Lakes by Patricia Mitchell, Ellie E. Prepas PDF

By Patricia Mitchell, Ellie E. Prepas

The Atlas of Alberta Lakes specializes in a hundred of Alberta's finest, preferred or such a lot studied lakes. It presents the entire details lake clients, scientists and lake managers may need. an intensive advent explains the clinical phrases and ideas utilized in each one bankruptcy and features a full-page colour map displaying the positioning of the lakes in accordance with drainage basins.

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Extra info for Atlas of Alberta Lakes

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Rocky peaks are barren of all vegetation and glaciers top many mountains. No alpine lakes are discussed in detail in the Atlas, but runoff and glacial meltwater from the Alpine Ecoregion provide inflow to several lakes and to most of the large onstream reservoirs such as Ghost and St. Mary reservoirs and Gleniffer Lake. West from Calgary and north and west from Edmonton are the boreal group of ecoregions. The Boreal Mixedwood Ecoregion lies north of the Aspen Parkland and covers most of the northern half of the province.

During years of low precipitation, there may be insufficient water entering a lake to offset evaporation, and the lake level will decline in spite of a weir. Similarly, during years of excessive precipitation, the level may temporarily rise above the level of the artificial outlet. For large lakes with small outlets, the time required for water to run out of the lake may be several weeks or months, and there is little that can be done to relieve flooding during that time. For most regulated lakes in Alberta, the new elevation after the weir is built is not greatly different from the natural one, usually less than 1 m higher, and rarely as much as 3 m higher.

All lakes described in the Atlas have hard water: Table 4. Mean (X) and range concentrations of major ions in the surface waters of the lakes in the Atlas. 3-114) Slightly saline lakes 113 (20-188) Moderately saline lakes Saline lakes World Average Freshwater Seawater 379(239-501) 34(10-66) 46(19-55) 21(9-31) 7172(1473-21851) 166(50-396) 154(107-206) 21(14-28) 8 10810 3 390 5 1300 30 410 Figure 17. A frequency distribution of total alkalinity indicates that the alkalinity of most lakes in the Atlas is between 100 and 200 mg/L CaCO3.

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