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

By Patricia Mitchell, Ellie E. Prepas

The Atlas of Alberta Lakes specializes in a hundred of Alberta's finest, hottest or such a lot studied lakes. It offers all of the details lake clients, scientists and lake managers may need. an in depth creation explains the medical phrases and ideas utilized in every one bankruptcy and features a full-page colour map displaying the positioning of the lakes based on drainage basins.

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Or average. A decline or increase in water level may continue for several consecutive years, depending on the predominant weather patterns. Over the period of record for most lakes, however, the water level shows neither a downward nor an upward trend (Fig. 12). Some Alberta lakes have no permanent inlet or outlet creeks. Gull, Garner and Dillberry lakes are examples. The water level in these lakes is controlled by a balance between precipitation, diffuse or subsurface runoff, groundwater inflow/outflow and evaporation.

Concentrations of dissolved oxygen in lakes in the Atlas range from 0 to above 20 mg/L. Oxygen enters lake water from three sources: from the air, as a byproduct of photosynthesis and with groundwater. Most oxygen inputs are in the top layers of the lake. Oxygen from the atmosphere enters the lake only at the surface. Under ice-cover, no oxygen can enter the lake from the air. Oxygenated groundwater is more likely in shallow water than in deep water. Photosynthesis, and thus the addition of oxygen by green plants, takes place only in the euphotic zone during daylight hours.

20). Studies during the 1980s on 20 lakes located from north of Peace River to south of Kinsella, Alberta, indicate that maximum ice thickness can vary from a minimum of 40 cm to almost 1 m, although the average maximum ice thickness is approximately 60 cm. In Alberta, the duration of ice cover is approximately five months, ranging from more than six months in the mountain lakes and in the northeastern part of the province, to no more than four months in saline lakes and many shallow lakes and reservoirs in southern Alberta.

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