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G.J. Arcement

Publications and source records attributed to G.J. Arcement.

3 recordsLinked to original sources
USGS1990

Water resources data, Louisiana, water year 1989

Water resources data for the 1989 water year for Louisiana consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground water. This report contains records for water discharge at 60 gaging stations; stage only for 14 gaging stations and 7 lakes; water quality for 35 surface-water stations (including 12 gaging stations), and 84 wells; and water levels for 232 observation wells. Also included are data for 104 crest-stage and flood-profile partial-record stations. Additional water data were collected at various sites not involved in the systematic data-collection program, and are published as miscellaneous measurements. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Louisiana.

Louisiana↗
USGS1987

Roughness coefficients for densely vegetated flood plains

Although much research has been done on Manning 's roughness coefficients for stream channels, very little has been done on the selection of roughness values for densely vegetated flood plains. In this report four method for determining roughness coefficients for flood plains are examined and evaluated. Field data were collected at 13 sites on wide, densely vegetated flood plains where verified n values were known. The ' vegetation density ' of representative sample areas was measured at each site for use in determining roughness coefficients. The vegetation density method, proved to be useful in determining n values for wide, densely wooded plains. By measuring the area occupied by tree trunks and vegetation in a representative sample area, the vegetation density can be determined. Using the vegetation density in an equation developed from Manning 's formula, the Manning 's n can be determined for the representative sample area. (USGS)

Water-Resources Investigations Report↗