Global ETD Search

1	The long now: Re-framing prairie rivers Workman, Trent W. 06 May 2016 (has links) Spring flooding regularly occurs in the plain along the Assiniboine River’s low-lying terminus in eastern Manitoba as the river attempts to accommodate snowmelt drained from the central plains territory of North America. The annual insensitive response to the changing state of the river is a physical expression of competing understandings of time made manifest in the landscape. Can the consideration of time shift our understanding of flooding in the prairie context? How can a deep sense of time be expressed in our reaction to the design of the land? Shifting to thinking of a time-sensitive response to flooding, I aim to construct a hybrid cartography that addresses the relationship between observer and understanding fundamental to relevant critical projects in the landscape. This approach aims to understand the geographic and temporal context to reveal deep synchronicities ignored by rational approaches to both fluvial engineering and design. / May 2016 Landscape Architecture Time Geology Glacial Lake Agassiz Flooding Manitoba
2	Holocene paleohydrology from Lake of the Woods and Shoal Lake cores using ostracodes, thecamoebians and sediment properties Mellors, Trevor 07 September 2010 (has links) Ten sediment cores (2.0-8.5 m long) from various locations in Lake of the Woods (LOTWs) and Shoal Lake (SL) were recovered in August 2006, using a Kullenberg piston corer. From the study of the macrofossils (primarily ostracodes and thecamoebians) and the sediments in six processed cores, variations in paleoconditions were observed both spatially and temporally, and the timing of these changes were identified in over 10,000 years of postglacial history. Ostracodes disappeared from the LOTWs record from about 9000 to 7600 calendar years before present (BP) (about 5800 in SL), after LOTWs became isolated from glacial Lake Agassiz. Thecamoebians appeared in many cores around 2000 calendar years BP, with the earliest appearance at 9200. Buried paleosols in three cores indicate portions of the lake dried on several occasions during the Hypsithermal, perhaps indicating the region’s future climate response. One core contained a pink clay bed indicative of the Marquette readvance about 11,300 years (BP), and the subsequent input of water from the Superior basin. Ostracodes Thecamoebians Isostatic Rebound Climate Instability Lake of the Woods Shoal Lake Holocene Hypsithermal Laurentide Ice Sheet Lake Agassiz Marquette Readvance Charcoal Paleohydrology Sediments
3	Holocene paleohydrology from Lake of the Woods and Shoal Lake cores using ostracodes, thecamoebians and sediment properties Mellors, Trevor 07 September 2010 (has links) Ten sediment cores (2.0-8.5 m long) from various locations in Lake of the Woods (LOTWs) and Shoal Lake (SL) were recovered in August 2006, using a Kullenberg piston corer. From the study of the macrofossils (primarily ostracodes and thecamoebians) and the sediments in six processed cores, variations in paleoconditions were observed both spatially and temporally, and the timing of these changes were identified in over 10,000 years of postglacial history. Ostracodes disappeared from the LOTWs record from about 9000 to 7600 calendar years before present (BP) (about 5800 in SL), after LOTWs became isolated from glacial Lake Agassiz. Thecamoebians appeared in many cores around 2000 calendar years BP, with the earliest appearance at 9200. Buried paleosols in three cores indicate portions of the lake dried on several occasions during the Hypsithermal, perhaps indicating the region’s future climate response. One core contained a pink clay bed indicative of the Marquette readvance about 11,300 years (BP), and the subsequent input of water from the Superior basin. Ostracodes Thecamoebians Isostatic Rebound Climate Instabily Lake of the Woods Shoal Lake Holocene Hypsithermal Laurentide Ice Sheet Lake Agassiz Marquette Readvance Charcoal Paleohydrology Sediments

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