Flight height: 26,200 feet a.s.l.; lens focal length: 153.22 mm
Date: August 1, 1976
Scale: 1:46,900 (approx.)
Location: Townships 8 and 9; Ranges 12 and 13 WI
Map sheets: 1:250,000 62G Brandon
1:50,000 62G/11 Glenboro
Vegetation of the Assiniboine Valley and Assiniboine Delta in the Area of Spruce Woods Provincial Park
On panchromatic (black and white) air photographs the green leaves of deciduous trees produce a dark-grey tone. In this area the Assiniboine River 1 has incised itself into the sands of the Assiniboine Delta. River cliffs 2 and point bars 3 exist at several locations. Several abandoned channels 4 are also visible, one of which, known locally as BigIsland5, is of recent origin.
Riverine gallery forest—very dark-grey toned—is located along both sides of the AssiniboineValley (6 and 7) as well as along the valley floor 8 when it has not been removed for agriculture. In this area the forest includes cottonwood (Populus deltoides), Manitoba maple (Acer negundo), green ash (Fraxinus pennsylvanica), basswood (Tilia americana), and willow (Salix spp). Elms (Ulmus americana) are also found but “many are dying from Dutch elm disease which reached Winnipeg from North Dakota in 1975”[i] The sand dune areas north and south of the river have a mixed vegetation cover. The dark-toned areas 9 are areas of deciduous woodland, principally aspen (Populus tremuloides) with occasional patches of white spruce (Picea glauca). One area in the centre 10 is being cleared of trees. Light-toned areas 11 are grass covered.
Most of this area lies within SpruceWoodsProvincialPark and has been left in its natural state. However, some land on the valley floor 12 as well as an area in the southwest 13—outside the park—has been cleared for agriculture. The area is devoid of settlements, and only a few minor roads 14 and paths 15 can be identified.