New Directions in Water Resources Planning for the U.S. Army Corps of Engineers (1999) / Chapter Skim
Currently Skimming:
2 The Water Resources Development Act of 1986 and Other Legislative and Adminstrative Initiatives
2 The Water Resources Development Act of 1986 and Other Legislative and Adminstrative Initiatives
Pages 19-32
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From page 19... ...
This was not the first time Congress mandated cost sharing between the federal government and local sponsors. The 1936 Flood Control Act, for example, required nonfederal sponsors to provide land easements for some flood darnage reduction projects, and other cost-shanng arrangements date back even further (e.g., to the 1920s for projects along the Lower Mississippi River)
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Changes initiated by WRDA '96 are not included in either. The committee was especially interested in determining if these cost-shanug criteria confined any biases against nonstruch~ flood damage reduction projects.
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WRDA 1986 and Other Legislative and Administrative Initiatives 21
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22 New Directions in Water Resources Planning
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- ._ O ~ =. ~· -e ~0 S: O ~oi ~Q O ~ · ~ ~ ~ 3 0 ~ ~ ~ .~ c~ 00 ;> ~ s~ ·~; ~ O .= ~ 3 ~ c ° 0 ° ~L, ~§ 00 ~ WRDA 1986 and Other Legislative and Administrative Initiatives ~o ~ o ~ ~ cn ~ o u)
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Water resource engineers and planning agencies have historically designed dams and other flood damage reduction structures according to a standard "base flood", such as the 100-year flood or the probable maximum flood (PMF)
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From page 29... ...
, mandates two kinds of risk analysis for flood damage reduction studies, one applied to flood events and the other to economic and hydraulic variables. For flood events, regulations state that when standard freeboard (vertical levee height added to the design flood stage level)
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Environmental Risk Assessment and Restoration Projects An emerging challenge to Corps planning is the use of enviromnental risk assessment, especially as it relates to environmental restoration projects. The Corps has a substantial history of evaluating the environmental impacts of water projects.
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Treatment of uncertainties in ecological restoration projects is very different Dom uncertainties in flood damage reduction projects. Hydrologic uncertainty of AREA 1986 and Other Legislative and Administrative Initiatives 31
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From page 32... ...
These changes, in turn, can change the reliability of Corps projects. For example, the degree of protection afforded by a Corps flood Siam age reduction project can change if flood events occur more or less frequently in the fixture.
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