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Lesser Slave Lake AB
Canada

Concurrent low flows in the Athabasca River Basin


Year: 1989

Abstract:
A hydrologic parameter that has become synonymous with water quality evaluations of rivers is the term “7Q10”. This term represents the annual minimum 7-day discharge at a particular location along a river, below which flows would be expected to occur in only 10% of the years. The complement to this definition is that there is a 90% chance in any year that the average 7-day flow would never be less than the 7Q10 value. Areal variability in climatic and physiographic parameters throughout the Athabasca River basin produces a number of possible low flow scenarios. The question is then: what is the likely flow at one location if the flow at another is known to be the 7Q10 flow? The statistical analysis that answers this question is called conditional probability. It is an approach whereby the distribution of flow at one location is mathematically related to flow at another. Scenarios of expected concurrent flow along the Athabasca River are developed on the assumption that a 7Q10 event occurs at either Hinton, Whitecourt, Athabasca, or Fort McMurray. While expected flows represent the most probable situations, it is possible that a 7Q10 event can occur from a totally different flow pattern than expected. The likelihood of these other scenarios is outlined where appropriate. Both annual and open water scenarios are provided. A number of interesting flow patterns are evident. The premise that low flow events throughout the Athabasca River basin cannot be treated as independent events is confirmed. In the annual flow case, concurrent 7Q10 flows can span the reach from the Lesser Slave River to Lake Athabasca. In the open water case, there is a reasonable chance that concurrent low flows could extend from Whitecourt to Athabasca or from Athabasca to Fort McMurray. All scenarios point to the value in basin-wide assessments of low flow.

Concurrent low flows in the Athabasca River basin


Year: 1989

Abstract:
A hydrologic parameter that has become synonymous with water. qua 1ity eva 1uati ons of ri vers is the term 117Q101l. Thi s term represents the annual minimum 7-day discharge at a particular location along a river, below which flows would be expected to occur in only 10% of the years. The complement to this definition is that there is a 90% chance in any year that the average 7-day flow would never be less than the 7Q10 value. Areal variability in climatic and physiographic parameters throughout the Athabasca River basin produces a number of possible low flow scenarios. The question is then: what is the likely flow at one 1ocation if the flow at another is known to be the 7Q10 flow? The statistical analysis that answers this question is called conditional probability. It is an approach whereby the distribution of flow at one location is mathematically related to flow at another. Scena r; os of expected concurrent flow along the Athabasca River are developed on the assumption that a 7Q10 event occurs at either Hinton, Whitecourt, Athabasca, or Fort McMurray. While expected flows represent the most probable situations, it is possible that a 7Q10 event can occur from a totally different flow pattern than expected. The likelihood of these other scenarios is outlined where appropriate. Both annual and open water scenarios are provided. A number of interesting flow patterns are evident. The premise that low flow events throughout the Athabasca Ri ver bas i n cannot be treated as independent events is confirmed. In the annual flow case, concurrent 7Q10 flows can span the reach from the Lesser Slave River to Lake Athabasca. In the open water case, there is a reasonable chance that concurrent low flows could extend from Whitecourt to Athabasca or from Athabasca to Fort All scena ri os poi nt to the value in basin-wide assessments of low flow.

Contributions of Cree knowledge: naketehtamasoyahk ote nekan nitaskenan (caring for the land for the future)


Author(s): Geertsema, K. A.

Year: 2008

Abstract:
Aboriginal peoples in many parts of the world have developed ways of monitoring, amassing information, understanding and making associations about the local ecosystems they depend upon for subsistence resources. Appropriately, using their Traditional Ecological Knowledge (TEK), and ecosystem monitoring expertise may facilitate sustainable ecological systems. Systematic ecosystem monitoring is incidental to the sustainability of local ecosystem integrity and health. In areas disturbed by significant industrial, land and resource development, the capacity to "monitor" changing ecosystem conditions is crucial. This research demonstrates how five Aboriginal (Cree) communities in northern Alberta, Canada incorporate "systematic" ecosystem monitoring elements to assess local ecosystem condition and changes. The systematic ecosystem monitoring elements are described, including the use of "cultural keystone species" as condition indicators, the diagnostic measures used, the temporal and spatial elements, and how Cree Land Based Experts interpret and make associations about the health of fish, wildlife, plants, landscape habitat, water and air. This research reports on the observations of populations and condition of a number of cultural keystone species, hydrological yield and quality, and critical wildlife habitat affected by the cumulative effects of forestry, oil and gas, and a contaminant treatment facility development in the study area. The work also discusses the implications and ramifications to local Cree people to these changing ecological conditions. Finally, this research suggests how local Aboriginal peoples, their Traditional Ecological Knowledge (TEK), and their ecosystem monitoring expertise, can be of applied use within ecosystem management, and cumulative effects frameworks.

Dolphus Davis interview


Author(s): Davis, D.

Year: 1977

Abstract:
12 p. transcript of an interview with Dolphus Davis, conducted by Rose Saddleback on August 4, 1977. Tape number IH.271, transcript disc 27. History of Lesser Slave Lake Reserves, and details of the history of Swan River Reserve.

Ecological land classification south-east of Lesser Slave Lake, Alberta using airbourne and LANDSAT remote sensing


Author(s): Karpuk, E. W.

Year: 1978

Abstract:
Examination of the capabilities of LANDSAT satellite data and colour infrared aerial photography for an ecological survey of a boreal forest environment south-east of Lesser Slave Lake.

Factors affecting Métis identity in the Lesser Slave Lake area of northern Alberta


Author(s): Driben, P.

Year: 1975

Abstract:
This paper examines two identity- maintaining mechanisms at the East Prairie Métis Colony, and offers a brief comment on the feelings and emotions associated with Métis identity.

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