Sound way to save fish
Article Abstract:
A four zone assessment approach for fish passage monitoring during the pumped-storage operation reveals that fishes in the zone near trash racks and zone of immediate hydraulic influence are prone to maximum entrainment. The blueback herring is the most abundant fish in these zones and is affected the most by pumped-storage operation. The extended zone has maximum water pumped-back and entrains threadfin shad and juvenile gizzard. The draft tube zone constitutes the interior physical structure of the dam and requires least fish protection. The approach was created and performed by the Army Corps of Engineers.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1996
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Do-nothing cleanups
Article Abstract:
The focus of restoring polluted soil and ground water has shifted to intrinsic remediation or allowing nature to do the process. Intrinsic remediation involves the analysis of biological and geochemical processes that prevent contaminants from spreading and promote their natural breakdown. After determining the acceptable risk level, institutional controls that limit access to the polluted site and thus prevent exposure, is applied. The process offers a low-cost solution for sites that meet certain criteria. Case histories are discussed.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1996
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Electrokinetic cleanups
Article Abstract:
The electrokinetic phenomena in soils is one of the more contemporary techniques developed in waste remediation and management. Electrokinetic remediation involves the coupling of electrical potentials with hydraulic and chemical potentials in soils together with electrolysis reactions. This process has various resulting phenomena, but of special concern to waste control is electro-osmosis, the removal of lead from soils. The feasibility of this process is certain, but studies remain limited.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1992
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