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Temperature and dissolved oxygen in the Oldman River following construction of the Oldman River Dam

Description

The intent of this report is to summarise and interpret water temperature and dissolved oxygen data that have been collected at sites along the Oldman River during the summer months of 1991-2001,... More ≫

Description

The intent of this report is to summarise and interpret water temperature and dissolved oxygen data that have been collected at sites along the Oldman River during the summer months of 1991-2001, following the construction of the Oldman River Dam. The effects of the impoundment of the Oldman River on water temperature and dissolved oxygen in the 327 km from the Oldman River Dam to the confluence of the Oldman and Bow rivers are assessed. Predictions made prior to the impoundment of the Oldman River are evaluated and compared with post impoundment records. As well, the pre-impoundment implementation of the WQRRS model is examined as the basis for the establishment of current minimum flows.

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Investigations of streambed oxygen demand, Athabasca River, October 1994 to March 1995

Description

Streambed oxygen demand (SOD) is thought to account for a significant fraction of the total oxygen demand in the Athabasca River in the winter. SOD was sampled in the Athabasca River from October... More ≫

Description

Streambed oxygen demand (SOD) is thought to account for a significant fraction of the total oxygen demand in the Athabasca River in the winter. SOD was sampled in the Athabasca River from October 1994 to March 1995 with objectives of obtaining a series of measurements from upstream of Hinton to the Calling River area, and investigation temporal change in SOD at key sites.

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Oxygen conditions in the Athabasca River system, with emphasis on winters 1990-93

Description

This report presents the findings of dissolved oxygen monitoring and surveys on the Athabasca River system in the years 1990-93. Dissolved oxygen has been monitored by means longitudinal synoptic... More ≫

Description

This report presents the findings of dissolved oxygen monitoring and surveys on the Athabasca River system in the years 1990-93. Dissolved oxygen has been monitored by means longitudinal synoptic surveys, recording oxygen meters, and a network of regular sampling sites.

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Sediment oxygen demand during the winter in the Athabasca River and the Wapiti-Smoky River system, 1990

Description

Sediment Oxygen Demand (SOD) is an important variable in the oxygen balance of rivers, in particular during the winter under low flow and extensive ice-cover. In 1989, a method to measure SOD... More ≫

Description

Sediment Oxygen Demand (SOD) is an important variable in the oxygen balance of rivers, in particular during the winter under low flow and extensive ice-cover. In 1989, a method to measure SOD in-situ was developed and used to measure winter SOD rates in the Athabasca River. The main objectives of the 1990 study were to determine if SOD rates increased over the winter and to determine the longitudinal trend of SOD in the Athabasca River and the Wapiti-Smoky River system.

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An evaluation of interference by pulp mill effluent in the Azid-Winkler oxygen technique

Description

Bleached kraft pulp mill effluent contains a wide range of organic and inorganic compounds. This report examines if these compounds interfere with Azide-Winkler iodometric method of measuring... More ≫

Description

Bleached kraft pulp mill effluent contains a wide range of organic and inorganic compounds. This report examines if these compounds interfere with Azide-Winkler iodometric method of measuring dissolved oxygen.

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Athabasca River winter reaeration investigation : final report

Description

Proposed and existing pulp mill developments in the Athabasca River Basin impact on winter dissolved oxygen conditions in the rivers that receive their effluent. In 1987, Alberta Environment... More ≫

Description

Proposed and existing pulp mill developments in the Athabasca River Basin impact on winter dissolved oxygen conditions in the rivers that receive their effluent. In 1987, Alberta Environment started using water quality models to simulate dissolved oxygen levels. This information was used to formulate effluent standards and for management of basin water quality. This report describes the theory of air to liquid gas exchange, methods to measure reaeration, the procedure designed to measure under ice reaeration, results of the field study, and conclusions from the study.

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