Chapter
Apr 26, 2012
Ghost Shrimp Bioturbation and Effective Contaminated Sediment Cap Design
Author: Carl StiversAuthor Affiliations
Publication: Dredging '02: Key Technologies for Global Prosperity
Abstract
This paper reviews the current understanding of ghost shrimp natural history on the west coast of North America including preferred habitat types and bioturbation activities. From this information, cap design criteria and guidelines to protect against ghost shrimp bioturbation are presented that can be applied to a variety of capping situations. Design criteria and guidelines include: required cap thickness in various situations, water depths and environments that often have high rates of ghost shrimp bioturbation, and cap materials that reduce or prevent ghost shrimp burrowing activities or maximum depths. For cap thickness guidelines, the importance of differentiating between bioturbation that causes significant sediment turnover and observations of maximum ghost shrimp burrowing depths is also discussed. Natural history information is also used to better define reasonable requirements for long term monitoring of ghost shrimp presence and activities at capping projects.
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© 2003 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Carl Stivers
Senior Aquatic Scientist, Anchor Environmental, L.L.C., 1411 4th Ave, Suite 1210, Seattle, WA 98101
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