Accession Number : ADA118078

Title :   Review of Environmental Consequences of Waterway Design and Construction Practices as of 1979.

Descriptive Note : Final rept.,


Personal Author(s) : Thackston,Edward L ; Sneed,Robert B

PDF Url : ADA118078

Report Date : Apr 1982

Pagination or Media Count : 97

Abstract : Waterway projects designed and constructed by the Corps of Engineers (CE) include dikes, revetments, levees, and channel modifications for flood control and navigation purposes. A review of existing CE design guidance in the form of Engineer Manuals (EMs) and personal contacts with CE field offices was performed to appraise current practices regarding consideration of environmental effects in the design and construction of waterway projects. A computer-assisted review of the technical literature was also performed in order to determine observed adverse environmental effects of waterway projects. Possible adverse effects presented in the literature included wetlands drainage, loss of native vegetation, cutoff of oxbows and meanders, water table drawdown, increased erosion and sedimentation, and change of aesthetics. Alternatives to traditional channel modification were identified through the literature review. Structural alternatives to channel modification include levees, floodways, reservoirs, and land treatment measures. Additional alternatives include various forms of floodplain management; floodplain zoning; construction of bypass channels around sensitive wetland areas; construction of numerous, very small, water-retention structures; and substitution of clearing and snagging, or only snagging, for complete channelization.

Descriptors :   *Environmental impact, *Construction, *Waterways, Channels(Waterways), Dikes, Levees, Revetments, Flood control, Flood plains, Environmental engineering, Adverse conditions, Environmental protection, Army planning, Army Corps of Engineers

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE