Delta Marsh preliminary concept engineering report.
Material type:
TextPublication details: Manitoba : 1980Online resources: Abstract: Prior to construction of the Fairford dam in 1961 the levels of Lake Manitoba fluctuated naturally between elevation 810 an 816; the result had been that the marsh was one of the finest waterfowl breeding areas on the Canadian Prairies. Since 1961 the level of the Lake has varied from approximately elevation 812 to 813 with an average summer level at elevation 812.5. The consequence of this severe restriction to level fluctuations has been an overall deterioration of the Delta Marsh as a waterfowl breeding area. The Fairford dam reduces flood levels on Lake Manitoba; as a consequence there is a need to artificially increase marsh levels. Water levels can be increased either by pumping, gravity flow from surface runoff or diverting flow from the Portage Diversion.On occasion it is also necessary to lower water levels and drain areas;this can be accomplished either by gravity flow or pumping. It can be appreciated that schemes for regulating levels can involve large capital expenditur
| Item type | Current library | Collection | Call number | Status | Notes | Date due | Barcode |
|---|---|---|---|---|---|---|---|
Electronic Report
|
Electronic Library | Non-fiction | ESG (Browse shelf(Opens below)) | Available | April 30 1980 | 902 | |
|
Electronic Report
|
Electronic Library | Non-fiction | ESG (Browse shelf(Opens below)) | Available | April 15 1980 | 903 |
Browsing Electronic Library shelves Close shelf browser (Hides shelf browser)
CD# 2 file ESG001.PDF - ESG002.PDF
Prior to construction of the Fairford dam in 1961 the levels of Lake Manitoba fluctuated naturally between elevation 810 an 816; the result had been that the marsh was one of the finest waterfowl breeding areas on the Canadian Prairies. Since 1961 the level of the Lake has varied from approximately elevation 812 to 813 with an average summer level at elevation 812.5. The consequence of this severe restriction to level fluctuations has been an overall deterioration of the Delta Marsh as a waterfowl breeding area. The Fairford dam reduces flood levels on Lake Manitoba; as a consequence there is a need to artificially increase marsh levels. Water levels can be increased either by pumping, gravity flow from surface runoff or diverting flow from the Portage Diversion.On occasion it is also necessary to lower water levels and drain areas;this can be accomplished either by gravity flow or pumping. It can be appreciated that schemes for regulating levels can involve large capital expenditur