A preliminary analysis of level ditching at Cygnet Lake / A. Ritter.
Material type:
TextPublication details: AB : 1977.Description: 1 v. ; 28 cmOnline resources: Abstract: Cygnet Lake (17-38-38 W4) has had a history of drainage. The most recent was in 1975 when the outlet channel was improved and a stabilization structure constructed in response to a request by area landowners (Cygnet Lake Drainage District). An inlet channel from Sylvan Lake was started the same year. The purpose of this channel is, in part, to supply water to offset summer evaporation at Cygnet Lake which is a provincial bird sanctuary. Ducks Unlimited constructed a series of sinuous level ditches on the crown land portion of Cygnet Lake in the fall of 1975. Spoil material was deposited on alternate sides of the ditches in order to create loafing and nesting islands. These were seeded by helicopter on May 4, 1976 (see Alberta Annual Biological Report, 1976) with a mixture of timothy (Phleum pratense) alsike (Trifolium hybridum) and sweet clover (Melilotus sp.). The 2.5 miles (4.0km) of level ditching created an additional 9.0 acres (3.7 ha) of open water and the spoil material resulte
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Electronic Report
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Includes bibliographical references.
Cygnet Lake (17-38-38 W4) has had a history of drainage. The most recent was in 1975 when the outlet channel was improved and a stabilization structure constructed in response to a request by area landowners (Cygnet Lake Drainage District). An inlet channel from Sylvan Lake was started the same year. The purpose of this channel is, in part, to supply water to offset summer evaporation at Cygnet Lake which is a provincial bird sanctuary. Ducks Unlimited constructed a series of sinuous level ditches on the crown land portion of Cygnet Lake in the fall of 1975. Spoil material was deposited on alternate sides of the ditches in order to create loafing and nesting islands. These were seeded by helicopter on May 4, 1976 (see Alberta Annual Biological Report, 1976) with a mixture of timothy (Phleum pratense) alsike (Trifolium hybridum) and sweet clover (Melilotus sp.). The 2.5 miles (4.0km) of level ditching created an additional 9.0 acres (3.7 ha) of open water and the spoil material resulte