10 resultados para Sand mining -- Environmental aspects -- Queensland -- North Stradbroke Island

em University of Michigan


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Bibliography: p. 19-21.

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Pt. 2 has subtitle: Hearings before the Committee on Energy and Natural Resources, United States Senate, One Hundredth Congress, first session, on the status of the Department of Energy's effects to address issues concerning the defense materials production reactors ... October 27 and 29, 1987.

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This report summarizes the impact of Hurricane Allen (August 1980) on dune configuration, sand accretion or erosion, and changes in the vegetation on north Padre Island. Four experimental foredunes, the result of grass plantings from 1969 to 1973, and an unplanted control section were monitored in 1975-1977 and also in 1981. The 1981 posthurricane data were compared where possilbe, with the previous studies. Foredune elevation surveys were completed in March 1981; accompanying vegetation transects were made in July 1981. Hurrican Allen causes erosion of the dune face of all the experimental dunes, but caused a breach in only one dune. The beach elevations had returned to approximately prehurricane heights by the time the area was resurveyed. The unplanted control dune provided little resistance to waves generated by the storm and a large quantity of sand was deposited inland.

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Presented at EPA Symposium on Environmental Aspects of Fuel Conversion Technology, May 14, 1974.

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[Negative by J.G. Brown, Slide by Geo. D. Fuller; Department of Botany, ]

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Engineers; together with "Notes of papers on the working of mines, metallurgy, etc., from the Transactions of colonial and foreign societies etc."

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Caption: From Sleeping Bear; South Manitou; North Manitou

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verso: Sand bar at extreme north end of Grand Island where north stream flows into Lake Superior at low gradient