26 resultados para survey construction

em University of Michigan


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Includes bibliographical references.

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Cover title: Occupational employment statistics for Illinois, selected nonmanufacturing industries, 1984.

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Description based on: 16th annual revision (1964)

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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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At head of title: Serial No. 141. Department of Commerce. U.S. Coast and Geodetic Survey. E. Lester Jones, director.

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"For submission to U.S. Army Construction Engineering Research Laboratories, Champaign, Illinois"

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Mode of access: Internet.