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Full-Text Articles in Physical Sciences and Mathematics
The Impact Of Dams On Nitrogen Cycling In The Messalonskee Stream, Rebecca K. Forgrave
The Impact Of Dams On Nitrogen Cycling In The Messalonskee Stream, Rebecca K. Forgrave
Honors Theses
The Messalonskee Stream in central Maine has five hydroelectric dams on 16.6km. Each dam drastically changes the flow regime of the stream, dividing it into segments with different patterns of sediment settling and organic matter retention. I investigated how these disruptions impact nitrogen cycling, specifically nitrification rates above and below each dam. I expected higher nitrification rates above the dams, where levels of organic matter are higher, and lower rates below the dam where scouring removes organic matter and fine sediment from the streambed. I measured sediment nitrification rates with a nitrapyrin-inhibition assay and potential drivers of nitrification including sediment …
Impact Of The Keystone Xl Pipeline On North American Crude Oil Prices, Shawn Ian Stuart
Impact Of The Keystone Xl Pipeline On North American Crude Oil Prices, Shawn Ian Stuart
Honors Theses
This paper determines the economic impact of the TransCanada Keystone XL pipeline project. As the Keystone XL pipeline is extremely controversial it is beneficial to determine the impact on North American crude oil prices. Determining the economic impact the Keystone XL pipeline will have on crude oil prices will be a large detriment of whether the pipeline is economically beneficial. By using spot crude prices from different regions around North America and adding capacity of crude oil transmission from western Canada to southeast United States this paper determines the changes in regional spot crude oil prices. As the economic conditions …